Group Title: ARC-A research report - Agricultural Research Center-Apopka ; RH-75-2
Title: Chemicals for control of diseases of tropical foliage plants
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Permanent Link: http://ufdc.ufl.edu/UF00065974/00001
 Material Information
Title: Chemicals for control of diseases of tropical foliage plants
Series Title: ARC-Apopka research report
Physical Description: 5 leaves : ; 28 cm.
Language: English
Creator: Knauss, J. F ( James Frederick ), 1938-
Agricultural Research Center (Apopka, Fla.)
Publisher: University of Florida, IFAS, Agricultural Research Center
Place of Publication: Apopka FL
Publication Date: 1975
 Subjects
Subject: Foliage plants -- Diseases and pests -- Control -- Florida   ( lcsh )
Pesticides -- Testing -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: J.F. Knauss.
General Note: Caption title.
 Record Information
Bibliographic ID: UF00065974
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 71059288

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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







CHEMICALS FOR CONTROL OF DISEASES OF TROPICAL FOLIAGE PLAmTS


ii i,

"-3


fIaterial

Benl;:"'; 50 WPb


Captan 50 Wb


Daconil 75 WP
6F





Zinc + Manebab


Zineb 75 WPb


Concentration
per
100 gal

8 oz


1 1/2 lb


1 1/2 lb
1 1/2 pt





1 1/2 lb


1 1/2 lb


J. F. Knauss
University of Florida, IFAS
ARC-Apopka Research Report
RH-75-2



FOLIAR FUNGAL DISEASES


Active against Fusarium. Rhizoctonia
and Cerccu:pora. Must be alternated
with other fungicides. Non-phyto-
toxic.

Broad spectrun of activity. Fair
to good control. Non-phytotoxic.

Best choice for broad spectrum com-
pound. Can be very phytotoxic when
tank mixed with other chemicals,
ctherai.se non-phytotoxic. No spread-
er stirc.lk:r need.

Good broad spect.::,m activity.
Relatively ncn-phyototoxic.

Broad spectrum. Moderate to good
control. Non-phytotoxic. Reported
to be discontinued by company.


a
Includes Dithane M-45, Fore, Manzate 200

bAdd spreader-sticker (adjuvant). Plyac (2-4 oz/100 gal) employed at ARC-Apopka.


-AU" a2 1976 /


F. S
COmmerts -IUniv
'f lorq' ,"








-2-


FOLIAR BACTERIAL .DISEASES


Streptomycin
Sulfate 21.2 WPac


Combination of Kocide 101
86 WP & zinc + manebb,c


100 200 ppm


1 1/2 &
1 1/2 lb


Good activity against Erwinia
diseases. Do not increase concen-
tration above 200 ppm as resistance
can occur. May be used for a 10 -
30 min dip of propagative units.

Good activity against Xanthomonas
diseases. May be phytotoxic on
many foliage plants. Should never
be used as general spray for fungal
and bacterial control.


aAvailable as Agri Strep, Agrimycin 17

zinc + maneb = Dithane M-45, FORE, Manzate 200

Add spreader-sticker (adjuvant). Plyac (2-4 oz/100 gal) employed at ARC-Apopka.



SOIL-BORNE FUNGAL DISEASES AND FUNGICIDES FOR DRENCH APPLICATIONS


Rhizoctonia


Banrot 15-25 WP


Benlate 50 WP


Fermate 76 WP


Terrachlor 75 WP


8 12 oz


8 oz


1 1 1/2 lb


3/4 1 1/2 lb


Good activity, also contains
ethazol (Truban or Terrazole) which
is active against Pythium.

Excellent control, must be used in
combination with ethazol or with
Dexon if Pythium or Phytophthora
also present.

Good control, may cause stunting
of seedlings and cuttings.

Good control, should be applied
only once a year. May cause
stunting.











Pythium


Banrot 15-25 WP




Dexon 35 WP'




Ethazol
(Truban 30 WP or
Terrazole 35 WP)

Nurelle 7.2 EC


8 12 oz




8 16 oz.






8 12 oz

1 2 pt


Good activity, also contains methyl
thiophanate which.is active against
Rhizoctonia and Fusarium.

Good control. Also active against
Erwinia spp. Reported to be dis-
continued by company.



Excellent control of Pythium.

New compound due to be available
late 1975. Excellent control, non-
phytotoxic, systemic. Should be
tried and compared to presently-
used compounds.


Phytophthora


Ethazol
(Truban 30 WP or
Terrazole 35 WP)


Nurelle 7.2 EC


8 12 oz

1 2 pt


Moderate to good control.

Excellent control. See above.


Sclerotium rolfsii


Fermate 76 WP


Terrachlor 75 WP


2 3 lb


S1 1 1/2 Ib


Good control. May cause severe
stunting of seedlings and cuttings.

Good control. Should be anplied
only once a year. May cause
stunting.











Broad Spectrwum Drenches


Banrot 15 25 WP




Truban 30 WP +
Benlate 50 WPa


8 12 oz





12 oz + 8 oz


At currently suggested concentrations
will provide control of Pythium,
Rhizoctonia and Fusarium.

Best combination for broad spectrum
control of Pythium, Rhizoctonia,
Fusarium, and Phytophthora.


aIf control of Sclerotium rolfsii is desired also, either Fermate 76 WP (2-3 lb/
100 gal) or Terrachlor 75 WP (1-1 lb/100 gal) must be used in place of Benlate.



Suggestions on Drench Rate (Volume)


How much to apply to a bed or to pots is often a difficult question to answer.
The following suggested rules, if followed, will provide control with the least
phytotoxicity.

Rate (volume) applied per sq. ft.
Type Unit surface area


Mini-pots and shallow flats


3/4 pint/sq. ft.


------------------------------------------

Other pots < 4 inches in diameter
and propagative beds < 4 inches in
depth 1 pint/sq. ft.
-- ---------------------------- --- - - - ----
Pots > 4 inches in diameter and
propagative beds > 4 inches in depth 1.- 2 pints/sq. ft.


NOTE: If mixes or soils contain less than 50 per .cent peat moss never exceed
application rate of 1 pint/sq. ft.








-5-


General Rules for'Soil Fungicide Drench Application

1. Repeat drench applications should be applied no sooner than every 3 months.

2. With all drench applications except Turelle, come back and lightly rinse fungicide
off foliage after application.

3. Where preventative drench is applied to leafy unrooted cuttings, apply drench prior
to sticking cuttings. Have all workers wear Playtex-type rubber gloves when
sticking cuttings.



Fungicide-Bactericide Dips

Although only limited research work on dips has been done on foliage plants, a
10 30 minute dip containing Captan 50 WP (1 2 lb/100 gal) and Streptomycin
sulfate 21.2 WP (200 ppm) + 2 oz Plyac/100 gal. will provide broad spectrum activity.

Benlate 50 WP (1 1 lb/100 gal) can also be included and may provide additional
benefit. Remember to keep the suspension agitated during dipping and to allow the
dipped units to drain and become relatively dry before placing into propagative
beds or pots.


Literature Dealing with Diseases of Tropical Foliage Plants


1. Selected issues of "Florida Foliage Grower". Check index issues for articles
dealing with plant diseases. Obtain From: IFAS Extension Service, University
of Florida, Gainesville. 32611.

2. Plant Pathology Circular Series. Obtain From: Division of Plant Industry,
Doyle Conner Building, Gainesville, Florida. 32602.

3. "The U.C. System for Producing Healthy Container-Grown Plants Manual 23".
Costs $1.00 and is the best buy one can make. Get it! Obtain From:
Agricultural Extension Service, University of California, Berkeley,
California. '94720.




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