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Florida citrus spray guide
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Permanent Link: http://ufdc.ufl.edu/UF00049911/00004
 Material Information
Title: Florida citrus spray guide
Series Title: Circular
Physical Description: v. : ; 23 cm. (fold.)
Language: English
Creator: University of Florida -- Institute of Food and Agricultural Sciences
Publisher: Florida Cooperative Extensive Service, Institute of Food Agricultural Sciences, University of Florida
Place of Publication: Gainesville Fla
Creation Date: 1986
Publication Date: 197 -
Frequency: annual
regular
 Subjects
Subjects / Keywords: Citrus -- Diseases and pests -- Periodicals   ( lcsh )
Spraying and dusting in agriculture -- Periodicals -- Florida   ( lcsh )
Pests -- Control -- Periodicals   ( lcsh )
Genre: serial   ( sobekcm )
 Notes
Statement of Responsibility: University of Florida, Institute of Food and Agricultural Sciences.
Dates or Sequential Designation: 197 -
General Note: Desciption based on: 1980 edition.
Funding: Circular (Florida Cooperative Extension Service)
 Record Information
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: aleph - 000917306
oclc - 08265115
notis - AEM7601
System ID: UF00049911:00004
 Related Items
Preceded by: Florida citrus spray and dust schedule.

Table of Contents
    Historic note
        Historic note
    Front Cover
        Page i
    Front Matter
        Page ii
    Main
        Page 1
        Page 2
        Page 3
        Page 4
        Page 5
        Page 6
        Page 7
        Page 8
        Page 9
        Page 10
        Page 11
        Page 12
        Page 13
        Page 14
        Page 15
        Page 16
Full Text





HISTORIC NOTE


The publications in this collection do
not reflect current scientific knowledge
or recommendations. These texts
represent the historic publishing
record of the Institute for Food and
Agricultural Sciences and should be
used only to trace the historic work of
the Institute and its staff. Current IFAS
research may be found on the
Electronic Data Information Source
(EDIS)

site maintained by the Florida
Cooperative Extension Service.






Copyright 2005, Board of Trustees, University
of Florida





January 1986


Circular 393-L


Florida Citrus Spray Guide




1986

J.L. Knapp, D.P.H. Tucker, and J.W. Noling


Effective and Safe Use of Agricultural Chemicals
In Citrus Production
FOR USE IN COMMERCIAL GROVES ONLY


HUMIE LSIRIY

A\PR 11 1986

\.F.A.S. Univ. of Fiorid
... .......------~"" ~'~


Before using any pesticide:
Read the complete label and the general
instructions in this guide.












Florida Cooperative Extension Service
Institute of Food and Agricultural Sciences
University of Florida, Gainesville
John T. Woeste, Dean for Extension


UNIVERSITY OF FLORIDA


''















This program was compiled by J.L. Knapp, Extension IPM
Specialist--Citrus; D.PH. Tucker, Extension Horticulturist;
and J.W. Noling, Extension Nematologist; respectively, the
University of Florida's Institute of Food and Agricultural Sci-
ences (IFAS) Citrus Research and Education Center
(CREC)-Lake Alfred, FL; in cooperation with the University
of Florida Gainesville, CREC-Lake Alfred, and the
Agricultural Research and Education Center (AREC)-Fort
Pierce; and with the Horticultural Research Laboratory,
United States Department of Agriculture-Orlando, FL.

Federal and State regulations set general and specific stand-
ards that applicators must meet before they can use restricted
pesticides. The core manual entitled "Apply Pesticides Prop-
erly A Guide For Pesticide Applicators," should be studied
and followed by anyone using pesticides.

Products mentioned in this guide are subject to changing
EPA rules, regulations, and restrictions. Information pre-
sented is current at the date of publication.

Additional information regarding pests, their identifica-
tion, biology, and management, as well as pesticide safety
and ground and aerial application may be found in IFAS
publication SP-14, Florida Citrus Integrated Pest and Crop
Management Handbook.

See IFAS publication ENT-55C for a complete list of agri-
cultural chemicals labeled for use on Florida citrus.


For additional information, consult your
County Extension Director or Citrus
Agent.


The assistance of the Florida Agricultural Research Insti-
tute in providing information and review is appreciated.











Table 1. Pesticide regulations"'


Pesticide
Acaraben
(Chlorobenzilate)


Waiting Time Until
Reentry Harvest
0' NTL'


Other Use Requirements
RESTRICTED PESTICIDE.


Aliette 0W NA Non-bearing citrus only. Do not exceed 4 applications/season.
Carzol SP 0' 7 days Allow 30 days between applications. Do not apply more than 5 Ibs
during a 12 month period. Moderately toxic to honey bees4
Comite 0W 7 days Only 2 applications per year.
Copper 0' NTL3
Cygon 4 days 15 days Only 2 applications to mature fruit.
Dimethoate 4 days 15 days Registered for oranges, grapefruit, lemons, and tangerines. Highly
toxic to honey bees'
Diazinon 01 21 days Highly toxic to honey bees5
Difolatan O3 NTL' Do not apply when mature fruits are on tree.
Ethion 24 hrs 24 hrs 90 days between applications on grapefruit, orange, tangelo, and
tangerine. Only 2 applications per season on tangerines and tangelos.
24 hrs 21 days Lemons and limes; do not apply more than once per season.
Guthion RESTRICTED PESTICIDE. Only 2 applications per season.
(Azinphos-Methyl) Highly toxic to honey bees.
I application/season 24 hrs 7 days
2 applications/season 24 hrs 28 days
Kelthane 03 7 days None.
(dicofol)
Lead Arsenate 0' NTL3 Grapefruit only 1-6 weeks after bloom.
Lorsban 2 days 21 days Allow 30 days between applications. Highly toxic to honey bees'
Only 2 applications per season.
Malathion 03 7 days Highly toxic to honey bees5
Metasystox-R 48 hrs 7 days Registered for oranges, grapefruit, and lemons. Only 2 applications


NA
0
0
03
03


48 hrs


180
180
NTL3
NA
NTL3
NA
0o
NTL3
14 days


60 days
21 days


per season. Moderately toxic to honey bees4
Limited to one application per season.
RESTRICTED USE PESTICIDE. Limited to one application per season.


RESTRICTED PESTICIDE:
Registered for oranges, grapefruit, lemons, limes, and tangerines.
Non-bearing citrus only.
RESTRICTED PESTICIDE.
None.
RESTRICTED PESTICIDE2 Registered for oranges, grapefruit, and lemons.
Only 2 applications per season. One application per season to
lemons if mixed with oil. 45 days between applications.
When applied with oil. Highly toxic to honey bees'
RESTRICTED PESTICIDE2 Registered for oranges, grapefruit, and lemons.
Moderately toxic to honey bees4


Nemacur 15G
Nemacur 3
Oil
Paraquat
Plictran
Ridomil
Sim-Trol
Sulfur
Supracide


Systox


continued


Table 1. Pesticide regulations










Table 1. Pesticide regulations"' continued

Waiting Time Until
Pesticide Reentry Harvest Other Use Requirements

Temik O3 0 RESTRICTED PESTICIDE2 Registered for oranges, grapefruit, and limes.
O3 30 days RESTRICTED PESTICIDE' Registered for lemons. Permit required prior to
purchase and application. Note use restrictions on permit.

Vapam 03 NA Preplant soil fumigant.
Vendex 03 7 days Registered for oranges, grapefruit, and lemons. Only 4 applications
in any 12 month period. Only dilute sprays on lemons.

Vorlex 03 NA Reset site fumigation only.
'Extracted from federal and state regulations, and from registered labels.
2Restricted pesticides require a certification license to purchase and apply under federal and Florida state law.
'Reentry and harvest prohibited until sprays have dried or dust has settled unless label specifies differently. NTL = No time limitation. As much time as possible
should lapse between application and harvest or worker entry.
4Do not apply while bees are actively foraging.
5Will kill bees for 24 hours after application.
6Read product label for use precautions regarding worker safety, wildlife, and environmental concerns.

Table 2. Citrus rust mite treatment guide for control on Florida citrus

Pesticide Rate/500 gal Comments Other Pests
Dilute Spray Controlled
Acaraben 4EC 2.5 pts Length of control may be less in the
(Chlorobenzilate) summer spray. Do not use in spray
solution above pH 8. Do not exceed
5 pts per acre.

Carzol SP 0.5 lb Do not use in the summer spray. Do Up to 4 wks
not use in spray solution above pH 8. control of
Do not let tank mix set overnight, adult Diaprepes
Do not tank mix with Sorba-Spray. (Apopka Weevil)

Comite 6.55EC 1.0-1.5 pts Leaf distortion and/or fruit spotting Spider mites
may occur when used in the spring or
it may occur if tank mixed with oil or
applied within 2 weeks prior to or
following an oil application. Do not
use in spray solution above pH10.

Ethion 4EC 2.5-3.75 pts Use high rate in spring and summer. Spider mites, Scale
(25WP also available) as dilute spray
Ethion + Oil 3.75 pts Summer use only. If applied as a Scale
+ 0.5% concentrate spray, use exact rate Spider mites
to prevent excessive leaf drop and/or
fruit burn. Also see oil combinations
with fungicides for greasy spot control.

Dicofol 4EC 3.0 pts Do not use in groves with citrus snow Spider mites
Dicofol 1.6EC 1.0 gal scale unless scalicide is added. Do not
Kelthane MF 3.0 pts use in spray solutions above pH 8.
Kelthane 1.6EC 1.0 gal
Oil (FC435-66) 1% See comments under scale insects. Scale, Whiteflies,
Spider mites, Greasy
spot, Loosening
sooty mold

continued










Table 2. Citrus rust mite treatment guide for control on Florida citrus continued

Pesticide Rate/0S gal Comments Other Pests
Dilute Spray Controlled

Plictran 50WP 20-30 oz Fall application only. Do not tank mix Spider mites
with oil or apply within 4 weeks of an oil
application. If possible, avoid application
during "feather" growth flush. Do not
apply to lemon when yellow fruit is present.
Sulfur 25 lbs Limit to one application per season
(Dust also available) where supplemental rust mite control
is needed between main sprays.
Repeated use increases citrus red
mite and armored scale populations.
Do not combine with oil or apply
within 3 weeks of oil as fruit burn may
occur. May cause eye irritation to
applicators and fruit harvesters.
Vendex 50WP 20-40 oz Do not apply at rates greater than Texas citrus mite,
20 oz/500 gallons to fruit less than Citrus red mite
one inch in diameter when tank
mixed with oil or within 10 days
of an oil spray. Tank mixing with 1%
or more oil results in reduced
residual activity.
Vendex 4L 1.25-2.5 pts No restrictions regarding applications
with oil as above. Tank mixing with 1%
or more oil results in reduced
residual activity.

Table 3. Spider mites treatment guide for control on Florida citrus

Pesticide Rate/500 gal Comments Other Pests
Dilute Spray Controlled
Comite 6.55EC 1.0-1.5 pts Leaf distortion and/or fruit spotting Rust mites
may occur when used in the spring or
it may occur if tank mixed with oil or
applied within two weeks prior to or
following an oil application. Do not use
in spray solution above pH10.
Cygon 4EC 2.5-5.0 pts Citrus red mite only. Aphids
Dimethoate 2.67EC 4.0 pts Scale (except citrus
snow & black)
Ethion 4EC 2.5 pts Rust mites
(25WP also available) Citrus snow scale
Ethion + Oil 3.75 pts + Summer use only. If applied as a Scale
0.5% concentrate spray, use recommended Rust mites
rate to prevent excessive leaf drop
and/or fruit burn. Also see oil
combinations with fungicides
for greasy spot control.
Dicofol 4E 3.0 pts Do not use in groves with citrus Rust mites
Dicofol 1.6EC 1.0 gal snow scale unless scalicide is
Kelthane MF 3.0 pts added. Do not use in spray solutions
Kelthane 1.6EC 1.0 gal above pH8.
continued










Table 3. Spider mites treatment guide for control on Florida citrus continued

Pesticide Rate/0S gal Comments Other Pests
Dilute Spray Controlled

Oil (FC435-66) 0.5-1.0%c See comments under scale insects. Whiteflies &
loosening sooty
mold. Higher rate
for scale (except
snow scale), rust
mites & greasy spot

Plictran 50WP 20-30 oz Fall application only. Do not tank mix Rust mites
with oil or apply within 4 weeks of an
oil application. Avoid application during
"feather" growth flush. Do not apply
to lemon when yellow fruit is present.

Vendex 50WP 20-40 oz Texas citrus mite only. Do not apply Rust mites
at rates greater than 20 oz/500 gal to
fruit less than one inch in diameter
when tank mixed with oil or within
10 days of an oil spray. Tank mixing
with I % oil results in reduced residual
activity.

Vendex 4L 1.25-2.50 pts No restrictions regarding applications
with oil as above.Tank mixing with I%
oil results in reduced residual activity.


Table 4. Scale insects treatment guide for control on Florida citrus

Pesticide Rate/500 gal Comments Other Pests
Dilute Spray Controlled

Cygon 4EC 2.5-5.0 pts Does not control citrus snow scale Citrus red mites,
Dimethoate 2.67EC 4.0 pts or black scale. Aphids
Diazinon 4EC 5.0 pts For control of citrus snow scale only. Grasshoppers
(50W also available) Crickets
Ethion 4EC 3.75 pts Dilute spray only. Snow scale only. Rust mites
(25WP also available)
Ethion + Oil 3.75 pts + Summer spray only. If applied as a Rust mites
0.5% concentrate spray, use exact Spider mites
rate to prevent excessive leaf drop
and/or fruit burn. Also see oil
combinations with fungicides
for greasy spot control.

Guthion 2L 5.0 pts Do not use spray solutions above Rust mites
(Azinphos-Methyl) pH8. Use wettable powder formulation Whiteflies
(50WP also available) when tank mixing with oil. Mealybugs
Lorsban 4EC 2.5 pts Do not exceed 7 pts/acre. Do not Mealybugs
tank mix with Difolatan. Orangedog
Katydids

Malathion 5EC 10.0 pts Glover and yellow scale. Does not Plant bugs
control chaff or black scale. Crickets


continued










Table 4. Scale insects treatment guide for control on Florida citrus continued

Pesticide Rate/500 gal Comments Other Pests
Dilute Spray Controlled

Oil (FC435-66) 1% Does not control citrus snow scale. Do Rust mites
not apply if trees are wilting or in a Whiteflies
near wilt state. Do not apply within Spider mites
3 weeks of sulfur. Oil applied after Greasy spot
October may increase susceptibility Loosens sooty mold
of trees to cold damage and may reduce
crop the following year. Oil applied
in the fall may inhibit solids formation
and retard fruit coloring.
Can be tank mixed with any
recommended mite material
except where prohibited under
the comment section.

Supracide 2EC 2.5 pts Does not control Florida red scale Whiteflies
or brown soft scale. Miticide should
be added for rust mite control.

Table 5. Insects, other than scales treatment guide for control on Florida citrus

Pests Pesticide Rate/500 gal Comments Other Pests
Dilute Spray Controlled
Aphids Cygon 4EC 2.5-5.0 pts Citrus red mite,
Dimethoate 2.67 EC 4.0 pts scale insects
except citrus snow
and black
Metasystox-R 5.0 pts

Systox 2 5.0 pts
Mealybugs Apply before fruit becomes infested.
Application after the fruit has set will
kill exposed mealybugs but not those
that have settled under the button.
Guthion 2L 5.0 pts See restrictions under scale. Scale
(Azinphos-Methyl) Rust mites
(50WP also available) Whiteflies
Lorsban 4EC 2.5 pts Do not exceed 7 pts/acre. See scale insects.
Do not tank mix with Difolatan. Katydids
Orangedog
Whiteflies Apply postbloom after the adult
females have deposited their eggs,
followed by a summer application.
Oil (FC435-66) 0.5-1.0% See restrictions under scale. Spider mites
Loosens sooty mold.
Use 1.0% rate for
scale (except citrus
snow) and rust
mites. See oil
under Table 6 for
greasy spot control.
continued










Table 5. Insects, other than scales treatment guide for control on Florida citrus continued

Pests Pesticide Rate/500 gal Comments Other Pests
Dilute Spray Controlled

Guthion 2L 5.0 pts Do not use spray solutions above pH8. Scale
(Azinphos-Methyl) Use wettable powder formulation when Rust mites
(50WP also available) tank mixing with oil.
Supracide 2EC 2.5 pts Miticide should be added for Scale
rust mite control.

Grasshoppers Diazinon AG500 2.0 pts Will not control medium- to large- Crickets
sized lubbers.

Crickets Diazinon AG500 2.0 pts Grasshoppers
See scale insects

Guthion 2L 5.0 pts Plant bugs
(Azinphos-Methyl) Scale
(50WP also available) Rust mites
Whiteflies

Malathion 5EC 10.0 pts See scale insects
Plant bugs

Plant Bugs Guthion 2L 5.0 pts Crickets
(Azinphos-Methyl) Scale
(50WP also available) Rust mites
Malathion 5EC 10.0 pts Crickets
See scale insects

Orangedog Bacillus thuringiensis Follow label Small trees only. Do not exceed
16,000 IU/MG recommendations 400 gal per acre.
Lorsban 4EC 2.5 pts Do not exceed 7 pts/acre. Katydids
Do not tank mix with Difolatan. Mealybugs
See scale insects

Katydids Lorsban 4EC 2.5 pts Do not exceed 7 pts/acre. Orangedogs
Do not tank mix with Difolatan. Mealybugs
See scale insects

Table 6. Fungus diseases fruit and/or foliage treatment guide for control on Florida citrus
Rate/
Market Disease 500 gal
Disease Variety Destination Pressure' Timing Treatment Dilute Comments
Scab Temples Fresh and Heavy Late Difolatan 6 lbs This is the more essential treat-
and process Dormant2 80 Sprills ment. Difolatan applied at 2/3 petal
Murcotts fall will aid in melanose control;


+

% petal Difolatan
fall 80 Sprills


however, a postbloom copper
treatment will also be required for
melanose control.


6 lbs


Light %/ petal Difolatan
fall 80 Sprills


6 lbs


Same as above.


continued









Table 6. Fungus diseases fruit and/or foliage-- treatment guide for control on Florida citrus continued


Market
Disease Variety Destination

Grapefruit Fresh
and (Mature Crop
Minneola Harvested)
Tangelos


Disease
Pressure' Timing Treatment
Heavy Late Difolatan
Dormant 80 Sprills34


Light Late Difolatan
Dormant 80 Sprills


6 Ibs


Fresh (Mature 2-3 wks Copper 3.0-4.0 A miticide should be added to the
Crop Not after lbs spray when copper is applied. The
Harvested) petal fall (metallic) residual control of the miticide
+ may be shortened.
2-3 wks Copper 3.0-4.0
later lbs
(metallic)
Process No control
necessary
Melanose5 All3 Fresh Late April Copper 3.0-4.0 Also helps to control scab. A miti-
to early lbs cide should be added to the spray
May6 (metallic) when copper is applied. The
residual control action of the miti-
cide may be shortened.
2-4 wks Difolatan 6 lbs May cause injury to rind. Do not
postbloom 80 Sprills tank mix with oil or apply within
60 days of oil or an oil-based sub-
stitute.
Process No control
necessary
Greasy Grapefruit Fresh Light to July7 Copper 1.5-2.0 lbs
Spot heavy + (metallic)
Oil 0.5%
All other Fresh Light July7 Oil 1%
varieties8
Heavy July7 Copper 1.5-2.0 lbs
+ (metallic)
Oil 0.5%
All Process Light to July7 Oil 1%
moderate
Copper 1.5-2.0 lbs
(metallic)
Heavy July7 Copper 1.5-2.0 lbs
+ (metallic)
Oil 0.5%
Copper 1.5-2.0 lbs
(metallic)


continued


Rate/
500 gal
Dilute


Conments


12 lbs








Table 6. Fungus diseases fruit and/or foliage treatment guide for control on Florida citrus continued
Rate/
Market Disease 500 gal
Disease Variety Destination Pressure' Timing Treatment Dilute Comments
Alternaria Dancy Late Difolatan 6 lbs Apply either routinely late dor-
Brown Tangerines Dormant to 80 Sprills mant or only at first appearance of
Spot 2 petal disease symptoms on spring
fall flush, if infection appears.
+
Late April- Copper 3.0-4.0 lbs Both of these copper sprays are
early May (metallic) necessary even if Difolatan has
+ been applied previously.
Late May- Copper 3.0-4.0 lbs
early June (metallic)

Minneola Same as for Dancy tangerines except do not apply Difolatan after first sign of
Tangelos shoot emergence.24
' Based arbitrarily on heaviest infection during the preceding 5-year period.
2 First sign of shoot emergence, usually in late February.
3 Mature groves only, unless excessive dead wood.
SDifolatan 80 Sprills can be phytotoxic to tender foliage of grapefruit and Minneola tangelos.
5 Recommendations are based on disease control to prevent fruit blemish only. Control of lesions on foliage is not practical.
6 A better assurance of control is provided by applying one spray 2-3 weeks after petal fall and a second spray 2-3 weeks later.
7If application requires longer than 30 days, begin treatment in late June and continue into early August. To obtain greasy spot control on
summer flushes that grow out after July, another application would be required in August or September. These later growth flushes are
affected much less by greasy spot than are those of the spring and early summer. A second application is seldom necessary. Oil alone
is usually inadequate for control of greasy spot rind blotch (pink pitting) which has to be controlled on fruit intended for fresh market.
SGreasy spot is usually more severe on grapefruit, Pineapple, and Hamlins than on Valencias, Temples, Murcotts, and tangerines.

Table 7. Preharvest fungicide treatment to control postharvest decay stem end rot and green mold'
Rate
Pesticide Lb/Acre Timing
Benlate 1.0-2.0 Within 3 weeks of harvest
' This treatment provides protection against decay initiated in the degreening room that is not effectively controlled by subsequent
postharvest fungicide treatments.

Table 8. Phytophthora treatment guide for control on Florida citrus


Material
Aliette 80WP
(Non-bearing only)



Ridomil 2E
(Non-bearing only)


Rate Method of Application
5.0 lbs/100 gal. Do Foliar spray to runoff.'
not exceed 5 lb/A


Comments
Protectant and
curative. Do not
tank mix with other
products.


2 gal/acre of treated Surface spray on weed free area, followed
surface immediately by V2" irrigation.


4-6 oz/100 gal


Soil drench; apply 5 gal of mix in water ring.2


Protectant and
curative.

Do not tank mix
with herbicides.


Difolatan 80 Sprills 0.5 lb/l gal water Trunk paint.3 Protectant.
Copper-Wettable Powder 0.5 lb (metallic) Trunk paint.3 Protectant.
Cu/l gal water
Copper-Count N 1 qt in 3 qts water Trunk paint.4 Protectant.
SApply at leaf flush. Do not exceed 4 applications per year.
2 Apply every 4 months for maximum control; in most cases a late spring and late summer application should be sufficient.
Apply in May prior to summer rains and/or in the fall prior to wrapping trees for freeze protection.
4 Do not apply to green bark; may cause gumming.








Table 9. Soil treatments Florida citrus

Material Rate Method of Application Months Before Pest Controlled
Planting


A. Preplant:
Methyl bromide


Vapam


Vorlex


B. Postplant
Nemacur 15G


Temik 15G


400-650 lb/acre
1.0-1.5 lb/100 ft2


100 gal/acre
1 qt/100 ft2


1 1/8-3 1/ pts/100 ft2
4-16 oz/site



67-133 lb/acre


33 lbs/acre


Inject 7-8 inches deep, tarp immediately for
2-3 days.


Soil drench, tarp, or water seal for maximum
effect.


Chisel inject 6-8 inches deep.
Injection gun


Broadcast: Apply specific dosage per acre as
a broadcast application. Incorporate immedi-
ately after application.
BAND: Apply proportionately less product
per acre based on band width. (Example: To
treat trees planted on 20 ft centers with a 10 ft
band centered on the tree row, apply one-half
product rate.) Center the treated band on the
tree row using minimum band width to "the
drip line." Incorporate immediately after
application.

BURROWING NEMATODE BARRIER:
Apply as a 16 ft band on the positive side of
the barrier at the rate of 133 lbs/acre.

Apply in band along drip line on both sides of
tree row by spreading granules uniformly and
immediately working into soil (preferred
method) or shank 2 to 3 inches deep using 4 to
6 shanks on 12 inch centers. Band width
should equal one fourth tree row spacing.


Activity against all
nematodes. Higher rate
controls Phytophthora
and weeds. Root sprout-
ing.

Activity against all
nematodes. Higher rate
controls Phytophthora
and weeds. Root sprout-
ing.

Citrus nematodes, Phyto-
phthora, and weeds and
root sprouting.


Postplant Citrus nematode
Burrowing nematode.


Postplant Citrus nematode
Citrus rust mite
Whiteflies
Aphids


Table 10. Lead Arsenate Spray Florida Grapefruit'
CAUTION: Excessive rates, improper timing, and fluctuating environmental conditions can result in phytotoxicity,
crop loss, and/or erratic results. Maximum allowable per acre rate may be insufficient for adequate response on large,
vigorous trees.

Variety Time of Application Formulation Maximum per Acre Rate
White 1-6 wks postbloom 4F2 10.8 pts
96WP 5.4 lbs

Pink & Red 1-6 wks postbloom 4F2 5.2 pts
96WP 2.6 lbs
'Fresh market reduces acidity for early season market.
Process market reduces acidity for midseason market.
2Do not spray while mature fruit from previous season is present.










Table 11. Growth regulator sprays Florida citrus
CAUTION: Growth regulators may cause serious problems if misused. Excessive rates, improper timing, and
fluctuating environmental conditions can result in phytotoxicity, crop loss, and/or erratic results. Read label
instructions carefully for precautions and additional information. Some formulations of 2,4-D are highly volatile, and
under certain environmental conditions may drift onto susceptible crops in surrounding areas. Extensive damage can
result with almost certain legal implications.

Variety and Time of Growth Regulator Rate per 500
Activity Application and Formulation gal Dilute


Midseason oranges.
Temples and grapefruit.
Reduction of preharvest
drop. Should not be applied
to nonbearing trees.

Navel orange. Reduction of
summer drop.


Seedless grapefruit.
Delay of rind aging process
and peel color development
at maturity. Combine with
2,4-D for fruit drop control.

Tangerines and tangerine
hybrids. Orlando tangelos.
Enhancement of peel color
formation and reduction of
plugging.

Tangelos.
Improvement of fruit set.
Can result in small size and
leaf drop.

Non-bearing citrus.
Inhibition of trunk sprout
growth.


Nov-Jan


2,4 dichlorophenoxyacetic acid (2,4-D iso-
propyl ester). Ester formulation preferable.


6-8 wks after bloom. Do
not apply during periods
of leaf flush.


Nov-Jan


5-10 days before harvest
provided fruit meets min-
imum internal quality
requirements and shows
10-20% color break.


Full bloom


Prior to sprout growth.
Caution may inhibit
sprouting desired for tree
recovery following freeze
damage.


2,4 dichlorophenoxyacetic acid (2,4-D iso-
propyl ester)


Gibberellic acid, GA3, (Pro-Gibb 3.91% liq-
uid concentrate)


Ethephon (Ethrel, 2 Ib/gal liquid concentrate)


Gibberellic acid, GA3, (Pro-Gibb 3.91% liq-
uid concentrate)



Naphthaleneacetic acid, NAA, (Tre-Hold
1.0% liquid concentrate)


2.8 liquid oz of 3.76 lb/
gal formulation (20 ppm)


2.1 liquid oz of 3.76 lb/
gal formulation (15 ppm)


20oz (10 ppm)


4.0 pts (3/ pts-Orlando
tangelos) Do not add sur-
factant. Dilute sprays
only.


10-30 oz (5-15 ppm)


Apply to trunk only
as thorough spray or
light brush application.
Excessively heavy appli-
cation may result in tree
damage.


Tangerines and Murcotts.
Fruit thinning. Activity
is temperature dependent.
Severe overthinning may
result from applications
made to trees of low vigor
and/or under stress
conditions.


Mid May


Naphthaleneacetic acid, NAA, (Fruit Fix 800
g/gal liquid amine formulation)


2-5 pts
(100-260 ppm)
Use lower rates on
Murcotts.










Table 12. Pounds of copper, zinc, manganese, and boron compounds to equal the standard dosage' per 500 gallons of water

Compounds Metallic Content Shown on Label (%)
5.0 20.5 34-36 48-50 52-56 75 80 85-90
Copper 11.7 8.5 7.0 5.0 4.3
Zinc 24.02 9.3 6.2 -
Manganese 8.5 7.0 4.5 -
Boron 1.25 -
SStandard dosage required to correct deficiencies, based on the element content per 500 gal, is 3.75 lb for copper; 5.0 lb for zinc;
3.75 lb for manganese; and 0.25 lb for boron.
2 This rate is equal to 2.0 gal of the 5% liquid formulation which will provide 1 lb zinc. Few liquid formulations of minor elements such
as zinc have been shown to satisfactorily correct moderate to severe deficiency symptoms at element rates below those considered
standard. They have also not shown the residual activity of the recommended insoluble formulations. In combination with oil they may
also be phytotoxic, especially when concentrated.

Table 13. Per acre dilute gallonage requirements and per acre pesticide calculations

Recommended Recommended Pesticide
dilute rate pesticide/ rate/acre
Tree Height Example gal/acre 500 gal (pts)' (pts)
18' + larger Ig. grapefruit 1500 2 6
14' to 16' Ig. orange 1000 2 4
med. grapefruit
10' to 12' med. orange 750 2 3
sm. grapefruit
less than 10' sm. orange 500 2 2
' Based on a recommend rate of 2 pts per 500 gallons.
Table 14. Example of dilute vs. concentrate sprays
WARNING: Danger of pesticide overexposure to the applicator increases as the concentration of spray increases as
outlined in this table. Provide appropriate training and protective clothing.
If the dilute pesticide recommendation is 2 pts per 500 gal and 1000 gal per acre are required for thorough coverage (Table 13), then:
X' Fraction Total Pesticide/ Pesticide/ Acres/
Cone. of of Dilute gallons/ 500 gal acre 500 gal
Pesticide Gallonage2 acre (pts) (pts)3'4
IX (Dilute) 1 1000 2 4 0.5
2X Modified 1/2 500 4 4 1
Dilute
3X 1/4 250 6 3 2
6X 1/8 125 12 3 4
7.5X 1/10 100 15 3 5
15X 1/20 50 30 3 10
X refers to the concentration of pesticide in the spray tank (not the gallonage per acre) when compared to a dilute mixture, i.e., I X equals
2 pts per 500 gallons, 3X equals (3 x 2) or 6 pts per 500 gallons. See columns one and four.
2 Fractions refer to the amount of spray applied per acre when compared to the dilute recommendation, i.e., IX or dilute equals 1000
gallons per acre, 1/4 of this volume is equal to 250 gallons of water per acre. See columns two and three.
SPesticide per acre is reduced at 3X and greater concentrations since there is no appreciable runoff when applying this reduced gallonage
per acre. This allows for the use of less material and reduces chance of over tolerance residues.
4 Per acre rate of pesticide can be calculated by determining dilute gallonage requirements based on tree height (Tables 13 and 14).

Table 15. Gallons of oil concentrates to use for each 500 gallons of dilute spray

If % oil in the stock is and the percentage oil desired in the spray tank is:
0.5% 1.0%
gal
97+ 2.55 5.10
90-92 2.75 5.50
83-84 3.00 6.00










Table 16. Weeds treatment guide for control in Florida citrus


Herbicide (Preemergence -
Soil Residual)
Hyvar X 80WP

Hyvar L
Trees 4 years and older


Rate per Treated Acre; Time of Application
3.0-4.0 lbs

3.0-4.0 qts
Do not exceed a total of 8.0 lbs or 8 qts per year.
Higher rates may be required for heavier soil
types and for certain established perennial grass
species. Apply prior to weed emergence or early
postemergence.


Weeds Controlled' and Comments
Annual broadleaf weeds, annual and peren-
nial grasses. Has postemergence activity,
particularly with surfactant. Do not tank mix
Hyvar L with acidic herbicides such as
Roundup or with liquid fertilizers.


Trees established 1-4 years


2.0-4.0 lbs
2.0-4.0 qts
Use lower rates for trees 1-2 years old.


Trees established for less than I
year



Karmex 80WP


2.0-3.0 Ibs
2.0-3.0 qts
Do not apply more than 6.0 lbs or 6.0 qts within
a 6-months period.
2.0-6.0 Ibs. Do not exceed a total of 8.0 lbs per
year on deep sandy soils. Do not exceed 4.0 Ibs
on mature trees, or 2.0 lbs per application on
trees less than I year old on shallow, poorly-
drained soils. Apply prior to weed emergence or
early postemergence.


Annual broadleaf weeds and annual grasses.
Contact activity enhanced by addition of
surfactant. Foliage contacted by Karmex may
develop a bleached or bronzed appearance.


Krovar II 80WP
(Hyvar X + Karmex 2:1)


Trees 4 years and older


Trees established for 1-4 years.


Trees established for less than I
year.


4.0-8.0 Ibs. Do not exceed 12.0 Ibs per year.
Apply prior to emergence of weeds or early
postemergence.

3.0-6.0 Ibs. Use lower rates on trees 1-2 years
old.

2.0-4.0 Ibs. Do not apply more than 6.0 lbs
within a 6-month period. Do not exceed 8.0 Ibs
per year.


Annual broadleaf weeds, annual vines,
annual grasses, and perennial grasses.
Contact activity enhanced by surfactant.


Krovar I 80WP
(HyvarX + Karmex 1:1)


Trees 3 years and older


Trees established 1-3 years


Trees established for less than I
year


4.0-8.0 lbs. Do not exceed a total of 12.0Jbs per
year. Apply prior to weed emergence or early
postemergence.



2.0-4.0 Ibs. Use lower rates on younger trees. Do
not exceed 8.0 lbs per year.

2.0-4.0 lbs. Do not apply more than 6.0 lbs
within a 6-month period or more than 8.0 lbs per
year.


Annual broadleaf weeds, annual vines,
annual grasses, and perennial grasses. Extra
Karmex increases activity on broadleaf
weeds. Contact activity enhanced by
surfactant.


continued










Table 16. Weeds treatment guide for control in Florida citrus continued

Herbicide (Preemergence -
Soil Residual) Rate per Treated Acre; Time of Application Weeds Controlled' and Comments

Sinbar 80WP

Trees established for more than 1 3.0-4.0 Ibs. Do not exceed a total of 8.0 Ibs per Annual broadleaf weeds, annual grasses, and
year year. perennial grasses.
Apply prior to weed emergence or early Contact activity enhanced by surfactant. Has
postemergence. greater safety factor than Hyvar X.

Trees established for less than 1 2.0-3.0 lbs. Do not apply more than 6.0 Ibs
year within a 6-month period. Do not exceed 8.0 lbs
per year.
Princep
80WP 4.0-12.0 lbs
4L 0.75-2.5 gal
Caliber 90 WDG 3.6-10.6 lbs

Sim-Trol 4L 0.75-2.5 gal
Do not exceed a total of 12.0 lbs or 2.5 gal per Annual broadleaf weeds, annual vines, and
year. Do not exceed 4.0 lbs or 1.0 gal on poorly- annual grasses. Does not control perennial
drained soils. Do not use on trees established for grasses. Has no contact activity.
less than 1 year. Use lower rates on trees
established for less than 4 years.
Apply only prior to weed emergence unless
mixed with a postemergence contact or systemic
herbicide.
Treflan 4EC 1.0-2.0 qts. A second application may be made Annual broadleaf weeds, annual grasses. Has
in 4-6 months. Apply as preplant or immediate no contact activity. Must be incorporated
postplant treatment prior to weed emergence. within 8 hours of application by rainfall or
irrigation. Highly insoluble and strongly
adsorbed to soil particles.
Treflan4EC 12.0-16.0oz per500 gal water. Apply 10gal per Do not tank mix Treflan with systemic
(Water ring treatment) tree assuming a ring diameter of 4 feet. insecticides and fungicides.
Apply prior to weed emergence as Treflan does Preferably these products should be applied
not control existing weeds. Apply during second at planting time when they will more likely
or third watering after soil has settled following move directly into the root zone.
planting, not at planting time.
Evik 80WP 8.0-12.01bs. Donotexceed a totalof 15.01bsper Controls emerged regular guineagrass (not
year. Use lower rates on younger trees. Apply narrow leaf type). Add surfactant for
early postemergence. For spot treatment with maximum contact activity, but do not exceed
hand boom use 4.0-6.0 lbs per 100 gal with I pt/100 gal. Avoid excessive contact with
added surfactant. young tree foliage. Residual weed control
activity limited.


Solicam 80WP & 80DF
May be applied to bearing and
non-bearing citrus established for
less than 1 year


4.0-5.0 Ibs. Do not exceed a total of 10.0 Ibs per
year. For best results apply prior to weed
emergence as Solicam does not have contact
activity.


continued


Annual grasses and certain broadleaf weeds.
Spectrum of broadleaf weeds controlled
increased by tank mixing with Princep/
Sim-Trol or Karmex. Suppresses established
nutsedge and perennial grasses. Control
requires repeated applications. Dense weed
growth should be controlled with contact or
systemic herbicides prior to Solicam
application to allow its maximum contact
with the soil surface. Tank mixes with
Paraquat or Roundup may be used where
weed growth is low growing and sparse.
Solicam activity is highly dependent on good










Table 16. Weeds- treatment guide for control in Florida citrus continued

Herbicide (Preemergence -
Soil Residual) Rate per Treated Acre; Time of Application Weeds Controlled and Comments
soil moisture following application, i.e.,
rainfall or irrigation. Contact with tree
canopy can result in a bleached appearance of
foliage and some distortion of young growth
flushes.

Solicam 80WP and 80DF 2.3 oz per 500 gal water.
(Water ring treatment) Apply 10 gal per tree assuming a ring diameter of
4.0 ft. Adjust rate according to ring diameter and
amount of water. Apply prior to weed
emergence. See product label for details. Apply
at second or third watering not during
planting operation.

Herbicide (Non-selective
Postemergence Systemic) Rate per Treated Acre; Time of Application Weeds Controlled' and Comments


1.0-4.0 qts
Lower rates are effective against certain seedling
annual weed species. Apply as needed to control
emerged weed growth. Repeated applications of
higher rates may be required to control some
perennial grass and vine species. Apply in active
stage of growth when grasses are about 18 inches
tall with enough top growth for good spray
interception. Perennial species, especially
grasses, are most susceptible at seedhead or early
bud stages. For perennial species, especially
vines, fall applications are usually most
effective.


Partial or total control of most weed species
following single or repeated applications. Has
no soil residual activity. Weeds germinating
after application will not be controlled.
Visible effects of herbicide on most annual
weeds occur in 2-4 days, but may not occur
for 7 days or more on many perennial species.
Extremely cool or cloudy weather may delay
visual effects. Do not apply when weeds are
growing under stress conditions such as
drought. When tank mixed with some
residual herbicides, Roundup loses some of its
activity. Such antagonism, more pronounced
with difficult-to-control perennial species,
may be overcome with increased rates of
Roundup. The activity of Roundup is
enhanced when applied in lower volumes
provided adequate coverage is achieved.
Foliage should be sprayed to wet, not runoff.
Apply 20-80 GPA, using higher volumes for
more dense vegetation. Low volume
applications of 5-20 GPA using lower rates of
1-2 qts/acre will provide control of annual
broadleaf weeds and grasses and burndown
or partial control of perennial species. Repeat
applications will usually be necessary.
Application rates required for flatwoods
areas have been found to be somewhat higher
than those for the "ridge" area. Roundup can
be used at 6 to 8 oz/acre for growth suppression
of bahia grass in tree row middles in spring
following the first mowing. Repeat
applications at 4 oz/acre can be used at 45-60
day intervals or when growth appears to have
resumed. For the selective control of tall
growing grass species in row middles, rope or
carpet wick applications may be made using
solution concentrations of 25 to 33 percent by
volume. If tank mixes include wettable
powder formulations, do not use volumes less


Roundup 4L


continued










Table 16. Weeds treatment guide for control in Florida citrus continued

Herbicide (Non-selective
Postemergence Systemic) ,,,,,,,, Rate per Treated Acre; Time of Application Weeds Controlled' and Comments

than 40 GPA. For spot treatment with
handgun equipment, use a 1-2% by volume
solution; i.e., I gal Roundup per 100 gal water
= 1% solution. Although the commercial
formulation contains surfactant, extra
non-ionic surfactant should be added at
volumes exceeding 50 GPA. Rainfall or
irrigation occurring within 2-4 hours of
application will reduce effectiveness of
Roundup. Heavy rainfall within 4 hours may
necessitate re-application.
AVOID CONTACT WITH CITRUS
FOLIAGE AND GREEN BARK.

Herbicide (Non-selective
Postemergence Contact) Rate per Treated Acre; Time of Application Weeds Controlled' and Comments
Paraquat Plus 2L 1.0-2.0 qts. Apply as required alone or in com- Destroys all green weed tissue contacted.
Gramoxone 2L bination with residual herbicide to emerged Rapid regrowth can be expected from
weeds. Apply before weed growth becomes too perennial species. Has no soil residual
dense as thorough spray coverage is required. activity for control of germinating seedlings.
Rainfall or irrigation within 2 hours of
application can reduce effectiveness.
Addition of a surfactant is essential for
maximum contact activity.
AVOID CONTACT WITH CITRUS
FOLIAGE AND GREEN STEMS.
(Biological-
Mycoherbicide) Rate per Treated Acre, Time of Application Weeds Controlled' and Comments
DeVine 1.0 pt Specific for the control of milkweed vine or
(Phytophthora (3.2X 10'l ivechlamydosporesperptor6.7X 10 Strangler vine, Morrenia odorata. Vines
palmivora MWV) per ml.) Apply during June through September infected will collapse over a period of 2-10
to emerged vines. Use one application per weeks depending on their size and
season. environmental conditions at and following
application. Apply with standard herbicide
boom using at least 50 GPA. Avoid excessive
contact with foliage and fruit. Soil must be
wet at the time of application. At least 1-2
inches of irrigation prior to treatment,
preferably followed by 1/2 inch 2-3 days
after treatment. Do not use chlorinated water
or mix with wetting agents, fertilizers, or
pesticides. Keep refrigerated prior to use -
do not freeze. Observe label precautions
carefully particularly when applying
DeVine in groves near plantings of certain
vegetable and ornamental crops. Do not use in
conjunction with Ridomil.

For specific weed species controlled by a herbicide, consult the product label.











































































This publication was produced at a cost of $3,228.80, or 29 cents per copy, to provide information on
pesticides recommended for citrus in 1986. 12-11M-85


COOPERATIVE EXTENSION SERVICE, UNIVERSITY OF FLORIDA, INSTITUTE OF FOOD AND AGRICULTURAL SCIENCES, K.R. Tefertiller,
director, in cooperation with the United States Department of Agriculture, publishes this information to further the purpose of the May 8 and
June 30,1914 Acts of Congress; and is authorized to provide research, educational information and other services only to individuals and institu-
tions that function without regard to race, color, sex or national origin. Single copies of Extension publications (excluding 4-H and Youth publica-
tions) are available free to Florida residents from County Extension Offices. Information on bulk rates or copies for out-of-state purchasers is
available from C.M. Hinton, Publications Distribution Center, IFAS Building 664, University of Florida, Gainesville, Florida 32611. Before publicizing this publication
editors should contact this address to determine availability.