Group Title: Mimeo report - University of Florida Everglades Experiment Station ; EES65- 28
Title: Control of soil insects, sweet corn insects, and celery insects
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Permanent Link: http://ufdc.ufl.edu/UF00067481/00001
 Material Information
Title: Control of soil insects, sweet corn insects, and celery insects
Series Title: Everglades Station Mimeo Report
Physical Description: 6 p. : ; 29 cm.
Language: English
Creator: Harris, Emmett D
Everglades Experiment Station
Publisher: Everglades Experiment Station
Place of Publication: Belle Glade Fla
Publication Date: 1965
 Subjects
Subject: Insect pests -- Control -- Florida   ( lcsh )
Genre: non-fiction   ( marcgt )
 Notes
Statement of Responsibility: Emmett D. Harris, Jr.
General Note: "April, 1965."
General Note: Caption title.
 Record Information
Bibliographic ID: UF00067481
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 64198903

Full Text
0O




Everglades Station Mimeo Report EES65-28


CONTROL OF SOIL INSECTS, SWEET CORN INSECTS, AND
S. -. 2/ .
Emmett D. Harris, Jr.


April 1965


The results shown in this report are not intended as ins control re m-
mendations. One should refer to Florida Agricultural Extension S 3D
or consult the County Agent, Experiment Station Entomologist, or Extension Ento-
mologist for vegetable insect control recommendations.

SOIL INSECT CONTROL

Experiment I Insecticide Granules in the Seed Furrow at Planting for Corn Wire-
worm, Melanotus, communis(Gyll.), Control on Florida 104 Sweet Corn. This experi-
ment was planted in mid-February.


Insecticides on
10% Granules

Parathion
Aldrin
Parathion-Aldrin
Paratnion-Aldrin
Thimet
Diazinon
Untreated


Experiment II -
104 Sweet Corn.
The seed furrow


,000
Lbs. of Actual Wireworms per 100 Plants Plants Percent
Insecticide Percent : per Damaged
Super Acre Live Dead Dead : Acre Plants

2 4 5 56 20.7 1.7
2 14 3 18 19.5 9 .5"
2 of each 3 7 70 22.9 2.0
1 of each 5 6 55 .22.3 .3.1
'2 0 4 : 100 21.8 0.5
2 3 5 63 22.5 1.5
21 0 0 20.0 16.9


Methods of Applying Parathion for Corn Wireworm Control-on Florida
Broadcast insecticide applications were made on January 27, 1965.
treatment was made during planting on February 11, 1965. '..


Parathion
Formulation

Emulsion
10% Granules
10% Granules
Untreated


Method of
Application

Broadcast
Broadcast
Seed Furrow


Lbs. of
Parathion
per Acre


Wireworms at 150 Plants
Percent
Live Dead Dead


8 1
'9" 0
S5 9
27 0


11
0
: 64
S0


Prepared for presentation at the Annual Vegetable Crops Field Day held at the
Everglades Experiment Station, May 4, 1965.

Associate Enotmologist, Everglades Experiment Station, Belle Glade, Florida.


1/


2/


,000- -
Plantsi
per
Acre


20.7
21.5
21.8
20.3


Percent
Damaged
Plants


2.8
3.0
1.3
-6.9


_ I __ _~_ _










Experiment III Kepone 4% Field Bait Method and Rate of Application for Corn
Wireworm Control on Florida 104 Sweet Corn. Broadcast bait applications were made
on January 27, 1965. Seed furrow treatments were made during the planting operat-
ion. Two replicates were planted on February 12. Three replicates were planted
on February 16.


Lbs. of ,000
4% Kepone Wireworms at 200 Plants Plants Percent
Method of Field Bait Percent per Damaged
Application per Acre Live Dead Dead Acre Plants

Broadcast 100 21 1 5 19.4 3.6
Broadcast 50 29 0 0 18.9 4.3
Seed Furrow 50 22 12 35 17.7 1.0
Seed Furrow 25 26 7 21 17.8 2.0
Untreated --- 37 1 3 19.1 5.8



When applied in the seed furrow, the bait retarded germination. As seen above
the final stand was slightly reduced. This was apparently due to the bait rather
than the insecticide as germination was retarded with other insecticide baits in
seed furrow treatments that are not reported herein, whereas, granular formulations
of the same insecticides seemed to have no effect on germination.


CORN STEM WEEVIL (Hyperodes humilis (Gyll.)) AND BUDWORM CONTROL ON SWEET CORN


In each of these experiments, Florigold 107 sweet corn was planted on March
25, 1965. It was sprayed twice weekly from March 30, the day after seedling
emergence, until April 19. Since that time it has been sprayed weekly. All of
the budworms collected in these experiments have been fall armyworms, Spodoptera
frugiperda (J. E. Smith). Corn stem weevil damage counts were made the day after
the final twice-weekly spray.

Experiment I SD 9129 Dosages. This insecticide has been applied as a 3.2 pound
per gallon water soluble concentrate and is being compared with a DDT 2 pound per
gallon emulsifiable concentrate.


Percent Budworm Damaged Plants
Lbs. Act. Percent Corn After the After the
Tox. per Stem Weevil Final Twice- First Weekly
Insecticide 100 Gals. Damaged Plants weekly Spray Spray

SD 9129 0.2 20 16 25
SD 9129 0.4 15 3 14
SD 9129 0.6 6 1 13
SD 9129 0.8 6 2 6
DDT 2.0 6 19 42
Untreated -27 79 94









Experiment II SD 8447 Dosages. This insecticide has been applied as a 75%
wettable powder and is being compared with DDT 2 pound/gallon emulsifiable con-
centrate.


Insecticide,

SD 8447
SD 8447
D...D 8447
SD 8447
UnDDTr
Untreated


Lbs. Act.
Tox, per.
100 Gals.

0.5
0.75
1.0
1.25
2.0
-


Percent Cor
Stem Weevi
Damaged Plani

12
1 .-:,
S101
13.
421
'21


Percent Budworm Damaged Plants
in After the ,After the
L Final Twice-. First weekly
ts ...weekly Spray : Spray


2.9
1.2
2.0
0.4
17.9
79.5


30
20.
:13
14
45
94


Experiment III Levels of Toxaphene with DDT


with and without Triton X-100.


Pints per 100 Gallons
Toxa-
phene Triton
DDT 2E 8E. X-100


Percent Corn.
S; Stem.Weevil
Damaged Plants


Percent Budworm
After the
Final Twice-
weekly Spray


Damaged Plants
SAfter the
First Weekly
Spray


4
-4
4 .
4
8
Untreated


24
18
. 27
37
28
97


Triton X-100 resulted in spray damage to
Toxaphene mixture.


the plants when used with the DDT-


Experiment IV Gallonages. Sprays containing 2 quarts of DDT 2E and
toxaphene 8E per 100 gallons were applied at different gallonages by
ground speed of the sprayer.


0.5 pint of
varying the


Average Gallons per Acre
First 3 Later
Sprays Sprays
2 Nozzles: 4,Nozzles
per row per Row


79
69
53
39
25
Untreated check


172
149
112
89
59


mph

2
2.4
3.1
4.0
6.0


:.... Prcdent'Budworm
Percent Corn After the
Stem Weevil Final Twice-
SDamaged Plants weekly Spray


Damaged Plants
After the
First Weekly
Spray.


2
2
0.5
0.5
None
check


0.5
None
0.5
None
None


2
9
6
12
10
35








EARWORM CONTROL ON SWEET CORN


Nearly all of the caterpillars that were observed in these experiments were
corn earworms, Heliothis zea (Boddie). The fall armyworm, Spodoptera frugiperda
(J. E. Smith) occurred infrequently.

Experiment I Miscible Spray Oil (70 SUS at 1000F., 94%unsulfonatable residue)
Levels with DDT 2E. DDT 2E was used at one gallon to 50 gallons of spray per
acre. Experimental applications were made every other day from April 9 to April
25, 1964. The Florigold 107 sweet corn was harvested on April 28, 1964.


Pints of Spray Oil
in 50 Gallons
per Acre


Percent
Worm-free
Ears


Crates of U.S. Fancy
Ears per Acre (Ignoring
Earworm Damage)


1.25
none
Untreated


Experiment II Miscible Spray Oil Levels with DDT 2E. DDT 2E was used at one
gallon to 50 gallons of spray per acre. Experimental applications were made
every other day from May 1 to May 19, 1964. Florigold 107 sweet corn was har-
vested on May 21, 1964. There was some yellowing of the foliage with the highest
level of the miscible spray oil but the quality of the ears seemed to be unaffected.


Pints of Spray Oil
in 50 Gallons
per Acre


Percent
Worm-free
Ears


Crates of U.S Fancy
Ears per Acre (Ignoring
Earworm Damage)


10.0
7.5
5.0
2.5
none
Untreated


216
186
202
238
190
170


Experiment III Levels of Sevin with DDT for Earworm Control. Experimental
applications were made every other day from April 9 to April 25, 1964. Florigold
107 sweet corn was harvested on April 28, 1964.


Insecticide Formulation per 50 Gallons per Acre
Sevin 80%
Sprayable
DDT 2E Powder


1 Gal.


Percent Worm-
free Ears


2.5 lbs.
1.25
0.625
None
2.5


None
Untreated Check








-5-


Experiment IV Screening Trial. Experimental Applications were made every other
day from April 9 to April 25, 1965. Florigold 107 sweet -crn was harvested.on
-April 28, 1964.


Amount to 50 Gallons


Insecticide Formulation


SD 8447 75% WP .
SD 9129 Technical
Triphenyl Tin Hydroxide 20% WP
Thiodan-Methyl Parathion 2-1.5E
DDT 2E
Untreated check


Formulation

1.5 lb.
0.8
1.0
2.67 pints
8


per Acre
Actual
Toxicant

1.125 lb.
0.8 ..
0.4
1.0-0.5
2.0


Percent
Worm-free
Ears


SERPENTINE LEAFMINER CONTROL ON CELERY


Celery was transplanted to the field in late November and sprayed weekly for
serpentine leafminer control. When it became obvious that weekly application did
not give adequate control, a twice-weekly schedule was followed. When the leaf-
miner population began to ebb in untreated plots, a weekly schedule was resumed.

Experiment I Levels of Dibrom 8E with and without Volck Spray Oil.


Pints of
Spray Oil
per
100 Gals.


Mines per 100 Leaflets (Cumulative)
Moderate Slight Very
or or Slight
Severe Worse Worse or Worse


Leafminers
per 100
Leaflets


After Weekly Applications, average of 4 observation dates:


None
1 Gal.
None
1 Gal.


127
108
152
140
178


241
199
288
260
287


313
270
367
345
326


127
111
141
140
167


After Twice-weekly Applications, average of 4 observation dates;


1
1
0.5
0.5
Untreated


0 0.5
0 0.5
0.5 1.5
0 0.5
6.5 52.5


Lbs. of
Dibrom
per 100
Gals.


1
1
0.5
0.5
Untreated


Percent
Dead


None
1 Gal.
None
1 Gal.


121
113
137
95
173


50
29
35
26
121


S99
97
94
92
33












Experiment II Spray Adjuvants with Dibrom BE. Dibrom 8E was used at 1 pint and
each spray adjuvant except Volck Spray oil was used at 8 fluid ounces per 100 gal-
lons. Volck Spray Oil was used at 1 gallon per 100 gallons. Below counts are the
average of two observation dates after twice-weekly sprays.


Adjuvant


None
Ortho Spray Sticker
Triton B-1956
Triton X-100
Volck Spray Oil
Untreated


Mines per 100 Leaflets (Cumulative)
Moderate Slight Very
or or Slight
Severe Worse Worse or Worse


73
100
117
88
72
222


229
277
345
218
228
276


Leafminers
per 100
Leaflets

81
85
106
57
64
201


EES65-28
400 Copies


Percent
Dead

100
95
97
100
100
33




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