Group Title: Immokalee AREC Research Report
Title: Vegetable field day
ALL VOLUMES CITATION THUMBNAILS PAGE IMAGE ZOOMABLE
Full Citation
STANDARD VIEW MARC VIEW
Permanent Link: http://ufdc.ufl.edu/UF00094211/00003
 Material Information
Title: Vegetable field day
Series Title: Immokalee AREC Research Report
Physical Description: v. : ; 28 cm.
Language: English
Creator: University of Florida -- Institute of Food and Agricultural Sciences
University of Florida -- Institute of Food and Agricultural Sciences
Agricultural Research Center (Immokalee, Fla.)
Agricultural Research and Education Center (Immokalee, Fla.)
Publisher: University of Florida, Institute of Food and Agricultural Sciences, Agricultural Research Center.
Place of Publication: Immokalee Florida
Immokalee Florida
Publication Date: 1978
Copyright Date: 1973
Frequency: annual
regular
 Subjects
Subject: Vegetables -- Varieties -- Periodicals   ( lcsh )
Vegetables -- Field experiments -- Periodicals -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
periodical   ( marcgt )
 Notes
Issuing Body: Issued by the Agricultural Research Center in Imokalee, Fla., which changed its name to the Agricultural Research and Education Center.
General Note: Description based on: 1973; title from caption.
General Note: Latest issue consulted: 1984.
 Record Information
Bibliographic ID: UF00094211
Volume ID: VID00003
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 433028245
lccn - 2009229391

Full Text

, _. Immokalee ARC Research Report SF73-1 May, 197;


* ... AGRICULTURAL RESEARCH CEiTER
/~ Imaokalee, Florida

of the

INSTITUTE OF FOOD ANiU AGRICULTURAL SCIENCES
UNIVERSITY OF FLORIDA


VEGETABLE FIELD DAY

Wednesday, Hay 10, 1978


******* ******* ** *


D. W. Lander, Collier County Extension Director BODERATOR

1:00 p.m. Assembly and Registration

1:15 p.m. Welcome Dr. P. H. Everett, In-Charge, ARC--Immokalee

1:20 p.m. Dr. 1 2. Waters Comments on research programs at AREC-Bradenton,
ARC-Dover and ARC-Immokalee

. 1;30 p.m. Reports on Current Research

%rs. A. J. Overman nematode research

Dr. D. E. Dougherty Vegetable disease control

Dr. T. A. Zitter Tomato viruses

Dr. U. J. Schuster Leafminer and pinworm on tomato

Dr. J. J. Augustine Tomato varieties and breeding program

Dr. P. H. Lverett Vegetable nutrition and cultural practices

3:00 p.m. Tour of Vegetable Research Plots and Iachinery Demonstration including:

1. Button-Johnson tomato harvester Mr. George Cooper

2. IFAS experimental punch planter for second cropping plastic
mulched beds Dr. Larry Shaw

3. IFAS square bar soil fumigant and liquid fertilizer applicator
for second cropping plastic mulched beds Dr. Wayne Iishoc
*******************

Soft drinks Courtesy of FH'C Agricultural Chemical Division (Howell Heald, igr.)
Truck Courtesy of Agrico Chemical Company (Lee Cross, 11gr.)
Truck Courtesy of Asgrow Florida Company (Skip Miller, ligr.)
Tractor Courtesy of Central Florida Tractor, Inc. (Bob Jacobson, Mgr.)








TOUR OF RESEARCH PLOTS*


Field :C'^


Block no,

1

2





1

2 & 3 south

3 north

4 & 5

6 north

6 south & 7

8

9 north

9 south

10

11

12 south

12 & 13 north

13 south & 14

15


Drip irrigation

Fertilizing through drip irrigation tubes



Field K"

Equipment demonstration

Tomato variety trial il types (obs.)

Tomato variety trial MH types (rep.)

Slow release fertilizers for pepper

Tomato variety trial stakes (rep.)

Tomato variety trial stakes (obs.)

Fungicide evaluation on tomato

Insecticides on tomato

Worm control on tomatoes

Watermelon variety trial

Fungicide evaluation on waterrelon

Fungicide evaluation on melon

Fungicide evaluation on melon

Insecticide/fungicide on 'Horgan' melon

Paraquat for sweet corn weed control


*Results reported in this Field Day Program are preliminary and
do not constitute an official recommendation unless so stated.

I


Page

7







9

10

10

11

14

15

16

17

18

19

20

21

22

23

24








REPORTS OF RESEARCH
Agricultural Research Center Immokalee


***********************


fungicides for Control of Gummy Stem Blight, Downy Mildew, and
Powdery 3Hildew on a Honeyde7--type 1elon (:'Morgan').

D. E. Dougerty

In the spring of 1977 the yields of l'organ' melon were satisfactory in
plots in which gummy stem blight was controlled. Benlate 50T3 at 1/2 lb/A
controlled gunmy stem and powdery mildew. Bravo 6F at 1-1/2 pt/A controlled
downy mildew, guamy stem blight, and gave best control of powdery milder. An
experimental chemical, CGA 43983, showed promise for control of downy mildew.

In an expanded test in the fall of 1977, downy mildew was the most serious
problemm encountered. Bravo 6F 3 pt/A, Ianzate 200 809 3 lb/A, Dithane i -45
837 3 lb/A, and the experimental CGA 43933 50W 1/2 lb/A gave best results for
control of downy mildew. Giving significantly lower yields and less control
of downy mildew although better than the unsprayed check plot were Dyrene 5017
5 lb/A, Difolatan 4F 3 pt/A, and the experimental CC7623 65V 2.3 lb/A. Powdery
mildew did not occur in this crop and gummy stem blight appeared late in the
season, never becoming serious.

All of the named materials mentioned above are cleared on cucurbits.


-3--








Fungicides for Control of Bud Rot or Blossom Hold of Pepper


w D. E. Dougherty

Bud rot or blossom mold of pepper caused by Choanephorn cucurbitarum,
frequently called 'Lotrytis disease' in this area, is a limiting factor in
production of pepper during hot weather. Only copper, maneb, mancozeb, and
zineb appear to be registered for use on pepper and none of these is
specifically recommended for control of bud rot.

In the fall of 1977, 24 materials or combinations of materials were tested
on peppers on this station. Bud rot did not attack that pepper crop so recom-
mendations for disease control cannot be given. Yields, however, were
significantly reduced by some treatments; treatments could be grouped into safe
ana p'Ltotoxic (unsafe) categories. The phytotoxic materials could not be
recommended for disease control where applications through a full season would
be required.

Saf~a
Bravo 6F 2 pt/A
;anzate 3 0- 2 lb/A
;enlate 5y7 1/2 lb/A
Thylate 657 1-1/2 Ib/A plus Agri-ilycin 17 1 Ib/A
laaeb 2.6F 1 qt/A and 2 qt/A
Citcop 4E 2 qt/A alone or in combination with any of the above

* Unsafe:
Botran 75W 1 lb/A or 2 Ib/A with or without Citcop
Dyrene 50W 3-1/2 lb/A with or without Citcop

done of the materials mentioned is registered for control of pepper bud rot.






Tomato Varieties and Breeding Program


Jimmy Augustine

'Walter' continues to be the most widely grown tomato variety on sandy soils
and -Flora-Daae: is the predominant variety on Rockdale soils. There are also
plantings of other University of Florida developed varieties and these include
SFlorida ;-1,' :Tropic,' 'Floradel,o and "Calypso.' In addition, there are a
auimer of trial plantings of varieties developed by commercial seed companies.
Some of these include,

Sir Talt and Improved Aalter by Abbott & Cobb
JP2332A by Asgrow
Royal Flush and Jackpot Ly Ferry- Tbrse
KiT #4, 5, and 12 by Fetoseed

The University of Florida tomato breeding program is continuing to strive
for the improvement of tomato varieties for Floriua. Essentially, the major
objective of the program is to develop a variety which is superior to Walter
and/or Flora-Dade and is adapted for machine-harvest. Other objectives include
the development of superior jointed hand-harvest determinate and indeterminate
types. Also, a limited amount of effort is devoted to the development of
processing and cherry types.

:.ore specifically there are a number of projects undertaken which will
benefit the variety development. These can be divided into pest resistance and
improve horticultural characteristics.

Some of the pest resistance work includes:
1. Late bLight
2. Early blight
3. Bacterial leafspot
4. Bacterial wilt
5. Old land disease
6. Fusarium crown rot
7. Tobacco Mosaic Virus
J. Potato Virus Y
9. Nematode
10. Leaf mold
11. Pinworr
12. Leafiiner

Some of the horticultural characteristics include:
1. High temperature fruit set
2. Low temperature germination
3. Low temperature growth
4. Low temperature fruit set
5. Increased red pigmentation in the fruit
5. Larliness
7. Improved flavor

iany of the above areas of research are a few years away from being in a
commercial variety but whenever incorporation occurs, the new variety will be a
tremendous asset.

The future varieties from this program appear to be just around the corner.
Tiere are a number of breeding lines which do appear to have very good potential
and appear to be superior to Walter and/or Flora-Dade.







TOUR OF RESEARCH PLOTS


Field "C"


DRIP IRRIGATION

Block 1 P. H. Everett


Purpose: To evaluate 3 types of drip tubes and 2 rates of slow release
fertilizer for tomato production on plastic mulch.


Tube type:


(1) Viaflo
(2) ;onotube
(3) Bi-',all


(Dupont)
(Spot System)
(Reed Irrigation)


Fertilizer rates;


(1) 1,000 lb/A (13.3 lb/100 row ft) Osmocote (15-5-21)
(4 month release)
(2) 2,000 lb/A (27.6 1L/100 row ft) Osnocote (15-5-21)
(4 month release)
Osmocote fertilizer spread on bed surface and then mixed
to a 4 depth.


Tube placement: Drip tubes placed down center of bed 2 below surface and 6!
to the side of plant row.


Planting data.


liar. 15, 1973 transplanted to field
Variety 'Halter'
Bed spacing 6' on center
plant spacing 24 down row








FPRTLIZL4G TfCT1ATOES T.iiOUG D.IrI IRMPIGATI0:U TUIES.


31ocL 2 P. i. Everett

Purpose. To evaluate the frequency effect of applying soluble fertilizer
through drip tubes for tomato production.


Schedule of treatments

Tr. no. Treatment
1 5 applications/week of 2 Ib :T/A for 20 applications
then 3 lb J/A for 45 applications

2 3 applications/week of 3 lb U/A for 12 applications
then 6 lb J/A for 24 applications

3 2 applications/week of 4.5 lb :/A for 3 applications
then 9 Ib i/A for 16 applications

4 1 application/week of 9 lb .i/A for 4 applications:
thea 13 lb J/A for 3 applications

5 Osmocote (15-5-21) equivalent to 2000 lb/A (27.6
1L/100 row ft) spread in 24 band on bad surface
then mixed to a 4 depth. Jo soluble fertilizer
through drip tubes.



Soluble fertilizer (19-0-30).: A blend of potassium nitrate and anmonium
nitrate. On the basis of a 90 day crop, 130 lb and 235 lb K20/A will
be applied to each of the first four treatments.

Planting data. liar. 15, 173 -- transplanted to field
Variety :'alter'
ied spacing -- 6' on center
Plant spacing 24 down row








Field "K"


EQUIPMENT DEMONSTRATION

Block 1

1. Button-Johnson fresh market tomato harvester. Mr. George Cooper, Glade
and Grove Supply, Inc., Princeton, FL.

2. IFAS experimental punch planter. Dr. Larry Shaw, Agricultural Engineering
Department, University of Florida, Gainesville, FL.

3. Square bar fumigant and liquid fertilizer applicator. Dr. Wayne Mishoe,
Agricultural Research and Education Center, Belle Glade, FL.

Crop: Florida MH-1 tomatoes

Planting data: 5 week old container grown seedlings transplanted Feb. 24, 1978.

Spacing: Beds 6' on center, plants 20" apart down row.







TOMATO VARIETY TRIAL MACHINE HARVEST TYPES (NON-REPLICATED).

Block 2 & Block 3 (south) J. J. Augustine & P. H. Everett


Purpose: To screen tomato breeding lines for advancement to replicated trials
and for eventual commercial use; also, to make single plant and/or bulk seed
selections for use in the IFAS tomato breeding program.

76 entries 1 plot of each entry.
3 commercial varieties Plot #72 Walter PF
Plot #73 Flora-Dade
Plot #74 Florida MH-1


Planting data:


Jan. 9, 1978 seeded in Speedling trays
Feb.16, 1978 transplanted to field
6' bed centers, 20" between plants (4356 plants/A)


Fertilizer: (1) 500 lb 5-8-8-2/A (6.9 lb/100 row ft) spread in 30" wide band
on pre-bed and bedded over.
(2) 1,000 lb 18-0-25/A (13.8 lb/100 row ft) banded on bed surface
9" to each side of plant row.






TOMATO VARIETY TRIAL MACHINE HARVEST TYPES (REPLICATED).


Block 3 (north) J. J. Augustine & P. H. Everett


Purpose: To compare advanced machine harvest type breeding lines for fruit
yield, size, quality, fruit set, earliness, vine habit, and other charac-
teristics important to machine harvest fresh market tomatoes.

7 entries 3 plots of each entry.


Variety or
breeding line
Fla. MH-1
Flora-Dade
IG-13-Bk
IG-14-2
IG-26-2
IG-28-SpBk
PSX 40175


Seed
source
Foundation Seed
Foundation Seed
IFAS
IFAS
IFAS
IFAS
Petoseed Co.


Planting data: Jan. 9, 1978 seeded in Speedling trays.
Feb. 16, 1978 transplanted to field.
6' bed centers, 20" between plants (4356 plants/A)

Fertilizer: (1) 500 lb 5-8-8-2/A (6.9 lb/100 row ft) spread in 30" wide band on
pre-bed and bedded over.
(2) 1,000 lb 18-0-25/A (13.8 lb/100 row ft) banded on bed surface
9" to each side of plant row.


-10-


Plot
no.
1
2
3
4
5

7







SLOW RELEASE NITROGEN FERTILIZERS FOR PLASTIC MULCHED PEPPER


Blocks 4 & 5 P. H. Everett


Purpose: To compare 3 placements and 3 rates of 6 fertilizers, 5 of which contain
slow release nitrogen, for their effect on plant stand (salt injury), growth
and yield of sweet pepper.

Fertilizer nitrogen sources:
1. Sulfur coated urea (SCU) (32.4% N) slow release N
2. Osmocote (15-5-21) slow release N
3. 10-12-11 blended fertilizer with 50% slow release N from Osmocote (14-14-14)
4. 10-3-18 blended fertilizer with 50% slow release N from IBDU (isobutylidene
diurea)
5. 10-3-18 blended fertilizer with 50% slow release N from Nitroform
6. 18-0-25 (potassium nitrate + ammonium nitrate) 100% fast release

Nitrogen rates:
1. 89 lb/A (low rate)
2. 178 lb/A (medium rate)
3. 267 Ib/A (high rate)

Superphosphate and/or potassium sulfate was used to supply equal amounts of
P and K wihtin each of the 3 nitrogen rates. Therefore, within the low N
rate all treatments received 89-107-160 Ib/A of N-P205-K20, respectively.

Fertilizer placements:
1. All fertilizer mixed into plant bed spread in a 24" wide band on
surface of finished bed then mixed to a depth of 4". Beds were re-pressed.
2. All fertilizer on surface of finished bed spread in a 24" band not
mixed.
3. Half & half 50% of fertilizer in 24" band on pre-bed, then bedded over,
and 50% spread in 24" wide band on surface of finished bed.

Note: Placement No. 3 (half & half) was not used with the 18-0-25.
Instead, 10% of the total fertilizer was spread in a 24" band on
bed surface; the remaining 90% was placed on bed surface in 2
narrow bands 9" to the outside of each pepper row.


-11-





Table of treatments


Plot
no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18


Nitrogen
source
SCU
SCU
SCU
SCU
SCU
SCU
SCU
SCU
SCU
Osmocote 10C
Osmocote 10C
Osmocote 10C
Osmocote 10C
Osmocote 10C
Osmocote 10C
Osmocote 10C
Osmocote 10C
Osmocote 10C


19 10-12-11 50% N from Osmocote 89 Mixed
20 10-12-11 50% N from Osmocote 89 Surface
21 10-12-11 = 50% N from Osmocote 89 1/2 & 1/2
22 10-12-11 50% N from Osmocote 178 Mixed
23 10-12-11 50% N from Osmocote 178 Surface
24 10-12-11 50% N from Osmocote 178 1/2 & 1/2
25 10-12-11 50% N from Osmocote 267 Mixed
26 10-12-11 50% N from Osmocote 267 Surface
27 10-12-11 50% N from Osmocote 267 1/2 & 1/2
28 10-3-18 50% N from IBDU 89 Mixed
29 10-3-18 50% N from IBDU 89 Surface
30 10-3-18 50% N from IBDU 89 1/2 & 1/2
31 10-3-18 50% N from IBDU 178 Mixed
32 10-3-18 50% N from IBDU 178 Surface
33 10-3-18 50% N from IBDU 178 1/2 & 1/2
34 10-3-18 50% N from IBDU 267 Mixed
35 10-3-18 50% N from IBDU 267 Surface
36 10-3-18 50% N from IBDU 267 1/2 & 1/2
37 10-3-18 50% N from Nitroform 89 Mixed
38 10-3-18 50% N from Nitroform 89 Surface
39 10-3-18 50% N from Nitroform 89 1/2 & 1/2
40 10-3-18 50% N from Nitroform 178 Mixed
41 10-3-18 50% N from Nitroform 178 Surface
42 10-3-18 50% N from Nitroform 178 1/2 & 1/2
43 10-3-18 50% N from Nitroform 267 Mixed
44 10-3-18 50% N from Nitroform 267 Surface
45 10-3-18 50% N from Nitroform 267 1/2 & 1/2
46 18-0-25 fast release 89 Mixed
47 18-0-25 fast release 89 Surface
48 18-0-25 fast release 89 1/2 & 1/2
49 18-0-25 fast release 178 Mixed
50 18-0-25 fast release 178 Surface
51 18-0-25 fast release 178 1/2 & 1/2
52 18-0-25 fast release 267 Mixed
53 18-0-25 fast release 267 Surface
54 18-0-25 fast release 267 1/2 & 1/2
55 No added fertilizer


-12-


1%

1%


N-rate
(lb/A)
89
89
89
178
178
178
267
267
267
89
89
89
178
178
178
267
267
267


Fertilizer
placements
Mixed
Surface
1/2 & 1/2
Mixed
Surface
1/2 & 1/2
Mixed
Surface
1/2 & 1/2
Mixed
Surface
1/2 & 1/2
Mixed
Surface
1/2 & 1/2
Mixed
Surface
1/2 & 1/2








Planting data:


Feb. 14, 1978 transplanted to field (container grown
'Early Cal Wonder')
Bed spacing 6' on center
12" between pepper rows
10" between plants in row


Results: Plants showing fertilizer salt damage have been counted each week
since transplanting. After each countdamaged plants were removed
from the plots and were not replaced.


Main effects of treatments


on percent salt damaged plants


Weeks after transplanting
Treatments 2 3, 4 9
- % damaged plants - -
Fertilizer sources
SCU 1.2 4.1 4.3 5.1
Osmocote (slow release N) 0.0 0.4 0.4 1.0
10-12-11 (1/2 Osmocote N) 0.0 0.1 0.2 0.4
10-3-18 (1/2 IBDU N) 0.0 0.1 0.2 1.2
10-3-18 (1/2 Nitroform N) 0.0 0.5 0.6 1.5
18-0-25 (fast release N) 0.5 0.9 1.6 3.0
Check (no fertilizer) 0.0 0.0 0.0 0.0

Fertilizer rates
Low 0.1 0.4 0.6 0.9
Medium 0.1 0.4 1.2 1.4
High 1.5 2.2 2.5 3.8

Fertilizer placements
Mixed in bed 0.3 1.4 1.8 2.2
Bed surface 0.4 1.2 1.4 2.9
Half & half 0.1 0.4 0.4 1.0


In this experiment salt injury has been at a minimum regardless of
treatment. Frequent rains during the first 6 weeks after transplanting pre-
vented high concentrations of salt from accumulating in the planting hole.


-13-








TOMATO VARIETY TRIAL HAND HARVEST TYPES (REPLICATED).

Block 6 (north) J. J. tugustine & P. H. Everett


Purpose: To compare advanced hand harvest type breeding lines having potential
as commercial varieties for fruit yield, size, and quality; vine habit; and
other characteristics important to fresh market tomatoes.

13 entries 3 plots of each entry.


Variety or
breeding line
Walter PF
Flora-Dade
1-5-1
117-2
FP32-1
130-1
Ells8-1
IG-26-2
IG-27A-SpBk
S77(5x6)
FTE 4
FTE 5
Villemaire


Seed
source
Foundation seed
Foundation seed
IFAS
IFAS
IFAS
IFAS
IFAS
IFAS
IFAS
IFAS
Petoseed Co.
Petoseed Co.
Petoseed Co.


Planting data: Jan. 6, 1978 seeded in Speedling trays
Feb. 16, 1978 transplanted to field
6' bed centers, 15" between plants (5808 plants/A)

Fertilizer: (1) 500 Ib 5-8-8-2/A (6.9 lb/100 row ft) spread in 30" wide band
on pre-bed and bedded over.
(2) 1,000 lb 18-0-25/A (13.8 lb/100 row ft) banded on bed surface
9" to each side of plant row.


-14-


Plot
no.


no.







TOMATO VARIETY TRIAL HAPN HARVEST TYPES (NON-REPLICATED).

Block 6 (south) 6 Block 7 J. J. Augustine & P. H. Everett


Purpose: To screen tomato breeding lines for advancement to replicated trials
and for eventual commercial use; also, to make single plant and/or bulk seed
selections for use in the IFAS tomato breeding program.

137 entries 1 plot of each entry.
Plot #1 is Walter PF
Plot #2 is Flora-Dade

Planting data: Jan. 6, 1978 seeded in Speedling trays
Feb. 16, 1978 transplanted to field
6' bed centers, 15" between plants (5808 plants/A)


Fertilizer:


(1) 500 lb 5-8-8-2/A (6.9 lb/100 row ft) spread in 30" wide band
on pre-bed and bedded over.
(2) 1,000 lb 18-0-25/A (13.8 lb/100 row ft) banded on bed surface
9" to each side of plant row.


-15-







FUNGICIDE EVALUATION ON TOMATO

Block 8 D. E. Dougherty


Purpose: To evaluate for control of tomato diseases, particularly late blight,
certain fungicides, some at varying rates of application or varying intervals
of application.

Planting data: Feb. 14, 1978 transplanted to field ('Walter' cv)


Plot
1
2
3
4
8
6
7
5
9
10
11
12
16
13
14
15
17
18
19
20


Treatment
Water
Bravo 500 1 pt/A
Bravo 500 2 pt/A
Bravo 500 3 pt/A
Bravo 500 1 pt/A moving to 2 pt or 3 pt/A if disease severity increases
Bravo 500 1 pt/A plus Citcop 4E 2 qt/A
Bravo 6F 1-1/2 pt/A (equivalent to Treatment 2)
Bravo 6F 3/4 pt/A applied twice weekly
Difolatan 4F 3-1/2 pt/A
Difolatan 4F 2-1/4 pt/A
DPX 3217 with mancozeb 1-1/4 lb/A
Manzate 200 1-1/2 lb/A
Maneb F 2 qt/A
CGA 48988 2E 3/8 lb ai applied weekly
CGA 48988 2E 1/2 lb ai applied bi-weekly
CGA 48988 2E 3/16 lb ai plus Bravo 500 2 pt/A
Top Cop with Sulfur F 4 gal/A
Top Cop Tribasic F 2 qt/A
Citcop 4E 3 qt/A
Dyrene WP 3-1/2 lb/A


All fungicides are applied in 121 gal water/A on a weekly (calendar) basis
with a backpack mistblower.


-16-








INSECTICIDES ON TOMATO (GROUND).

Block 9 (north) D. J. Schuster

Purpose: Evaluate new materials on tomato for control of insects; primarily
the vegetable leafminer, the tomato pinworm, and the southern armyworm.

Planting data: Mar. 15, 1978 transplanted to field (container grown 'Walter')

Weekly treatments begun: Apr. 6, 1978


Plot no. Treatment
1 Check (water)
2 Lannate 1.8L
3 Dimilin 25WP
4 EL-494 50WP
5 UC51762 75WP
6 UC51762 75WP
7 UC51762 75WP
8 CGC 72662 l.EC1
9 Dibrom 8EC +
Parathion 8EC
10 Monitor 4EC
114 day schedule


lb ai/100 gal

0.45
1.00
0.50
0.90
0.45
0.225
1.00
1.00
1.00
1.00


Operation: Insect counts taken at two week intervals.


-17-








WORM CONTROL ON TOMATOES (STAKED).

Block 9 (south) D. J. Schuster

Purpose: Evaluate insecticide combinations on tomato for control of insects;
primarily the tomato pinworm and the southern armyworm.

Planting data: Mar. 15, 1978 transplanted to field (container grown\'Walter')

Weekly treatments begun: Apr. 6, 1978


Treatment
Check (water)
Lannate 1.8L
Dipel WP
Dipel WP
Dipel WP
Lannate 1.8L
Dipel WP
Lannate 1.8L
Dipel WP
Thiodan 2.0L
Thiodan 2.0L
Dipel WP
Thiodan 2.0L
Dipel WP


lb ai/100 gal

0.45
0.50 product
1.00 product
1.50 product
0.225
0.50 product
0.225
0.25 product
1.00
1.00
0.50 product
0.50
0.50 product


Operation: Insect counts taken at two week intervals. Chevron Spray Sticker
added at 0.5 pt/100 gal.


-18-


Plot no.
1
2
3
4
5
6

7

8
9

10


m








WATERMELON VARIETY TRIAL

Block 10 P. H. Everett


Purpose: To compare 2 IFAS breeding lines (Dr. J. M. Crall, ARC-Leesburg) and
3 commercial varieties for melon yield, size and quality.

5 entries 5 plots of each entry.


Plot Variety or Seed
no. breeding line source
1 Fla. 75-1 Dr. Crall (ARC-Leesburg)
2 Fla. 77-1 Dr. Crall (ARC-Leesburg)
3 Jubilee Asgrow
4 Crimson Sweet FMC
5 Charleston Gray Asgrow


Planting data: Feb. 23, 1978 field seeded
Bed spacing 6' on centers
Hill spacing 3'
Thinned to 1 plant/hill

Fertilizer: (1) 500 lb 5-8-8-2/A (6.9 lb/100 row ft) spread in 30" wide band
on pre-bed and bedded over.
(2) 1,500 lb 18-0-25/A (20.7 lb/100 row ft) banded on bed surface
9" to each side of plant row.


-19-








FUNGICIDE EVALUATION ON WATERMELON


Block 11 D. E. Dougherty


To evaluate various fungicides alone and in combination against
mildew and gummy stem blight on watermelon.


Treatment


Lot


1 Water
2 Difolatan 3 pt/A
3 Bravo 6F 2 pt/A
4 Bravo 500 2-3/4 pt/A
5 Maneb F 2 qt/A
6 Manzate 200 3 lb/A plus Benlate 1/2 lb/A
7 CGA 48988 2EC 1/4 lb ai/A plus Benlate
8 CGA 48988 2EC plus BAS 352 1-1/2 Ib/A
9 CGA 48988 2EC plus Bayleton 4 oz ai/A
.0 Top Cop TriBasic 2 qt/A


Planting data:


Feb. 23, 1978 field seeded (Charleston Gray variety)
Mar. 23, 1978 re-seeded


Preliminary results:


Percent improvement over no chemical control of gummy stem blight

Evaluation dates
Plot Treatment 4/12 4/20 4/26
----- %-----
2 Difolatan 25 56 46
3 Bravo 6F 64 76 68
4 Bravo 500 62 66 35
5 Maneb F 36 57 42
6 Manzate 200 plus Benlate 54 43 58
7 48988 plus Benlate 73 62 58
8 48988 plus BAS 352 91 81 47
9 48988 plus Bayleton 36 43 32
10 Top Cop TriBasic (-22) 26 29


-20-


Purpose:
downy


P







FUNGICIDE EVALUATION ON MELON


Block 12 (south 1/3) D. E. Dougherty

Purpose: Last spring race 2 powdery mildew (PM) attacked cantaloupes while
rate 1 PM attacked 'Morgan' melon. The purpose of repeating treatments
10, 11, 12, 13, and 7 of the 'Morgan' fungicide evaluation is to determine
whether fungicides differ in ability to control one race of PM in Florida,
as well as to determine which other diseases might limit commercial
cantaloupe production in the Immokalee area.

Planting data: Feb. 1, 1978 field seeded (Harper Hybrid variety)


Plot Treatment
1 Plain water
2 Afugan 0.05% plus Manzate 200 3 lb/A
3 Bayleton 4 oz ai/A plus Manzate 200
4 Benlate 1/2 lb/A plus Manzate 200
5 Karathane 3/4 lb/A plus Manzate 200
6 Bravo 6F 2 pt/A


All applications are made on a weekly (calendar) basis in 100 gal water/A
with a backpack mistblower.

Preliminary results:


Percent improvement over no chemical for control of gummy stem blight

Evaluation dates
Plot Treatment 4/12 4/20 4/26
-----%-----
2 Afugan plus mancozeb 86 23 38
3 Bayleton plus mancozeb 100 76 51
4 Benlate plus mancozeb 92 72 83
5 Karathane plus mancozeb 64 53 52
6 Bravo 6F 69 44 43


-21-








FUNGICIDE EVALUATION ON MELON.

Blocks 12 and 13 (north 2/3 of both) D. E. Dougherty

Purpose: To evaluate fungicides and combinations bf fungicides in an attempt to
improve disease control on 'Morgan' melon. Afugan, Bayleton, Benlate,
Karathane, and KWG 0599 are being added to already effective Bravo 6F for
increased powdery mildew (PM) control. These materials will also be com-
bined with Manzate 200 and CGA 48988 which do not control PM. In tests with
48988 which controls downy mildew (DM) only, BAS 352 or CC 7623 have been
added to control gummy stem blight.

Planting data: Feb. 23, 1978 field seeded
Mar. 23, 1978 re-seeded


Plot Treatment
1 Plain water
2 Afugan 0.05% plus Bravo 6F 2 pt/A
3 Bayleton 4 oz ai/A plus Bravo 6F
4 Benlate 1/2 lb/A plus Bravo 6F
5 Karathane 3/4 Ib/A plus Bravo 6F
6 KWG 0599 8 oz ai/A plus Bravo 6F
7 Bravo 6F
8 Bravo 500 2-3/4 pt/A
9 Benlate plus Bravo 500
10 Afugan plus Manzate 200 3 lb/A
11 Bayleton plus Manzate 200
12 Benlate plus Manzate 200
13 Karathane plus Manzate 200
14 KWG 0599 plus Manzate 200
15 Bayleton plus CGA 48988 1/4 lb ai/A
16 Benlate plus CGA 48988
17 Afugan plus BAS 352 1-1/2 Ib/A plus CGA 48988
18 Karathane plus BAS 352 plus CGA 48988
19 KWG 0599 plus CGA 48988
20 Afugan plus CC 7623 1.5 Ib ai/A plus CGA 48988


All applications are made on a weekly (calendar) basis in 100 gal water/A
with a backpack mistblower.


-22-








INSECTICIDE/FUNGICIDE COMPATIBILITY ON 'MORGAN' MELON.


Block 13 (south end) and Block 14 D. J. Schuster & D. E. Dougherty

Purpose: To test the compatibility of four new insecticides and three new
fungicides in all combinations. These are the survivors of previous
screenings of fungicides or insecticides alone. Control of melon worm and
pickle worm damage as well as control of powdery and downy mildews and
gummy stem blight will be evaluated.


Planting data:


Feb. 23, 1978 -
Mar. 23, 1978 -


field seeded
re-seeded


Insecticide
Plain water
Orthene 75SP 1 Ib ai
Dipel WP 1 lb ai
Lannate 1.8L 1 Ib ai
Monitor 4ECG'
None
Orthene
Dipel
Lannate
Monitor
None
Orthene
Dipel
Lannate
Monitor
None
Orthene
Dipel
Lannate
Monitor


Fungicide

None
None
None
None
Bravo 6F 3 pt
Bravo
Bravo
Bravo
Bravo
Manzate 200 3 Ib plus Benlate 1/2 Ib
Manzate plus Benlate
Manzate plus Benlate
Manzate plus Benlate
Manzate plus Benlate
CGA 48988 2EC 1/4 lb ai plus Benlate 1/2 lb
48988 plus Benlate
48988 plus Benlate
48988 plus Benlate
48988 plus Benlate


All applications are made on a weekly (calendar) basis in 100 gal water/A
mixed together about 2 hours ahead of application by backpack mistblower.


-23-


Plot
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20








PARAQUAT FOR SWEET CORN WEED CONTROL.


Block 15 D. E. Dougherty & P. H. Everett

Purpose: The purpose of this experiment is to generate data which may be used
by Chevron to add post-emergence weed control in sweet corn to the Paraquat
label. Past experience indicates this use would benefit Florida growers.

Treatments:
1. 0.25 lb (1 pt) Paraquat CL plus 8 oz X-77/A
2. 0.50 Ib (1 qt) Paraquat CL plus 8 oz X-77/A
3. 1.00 lb (2 qt) Paraquat CL plus 8 oz X-77/A
4. Hand weed control
5. No weed control

Corn variety: Silver Queen

Results: Yields of harvested corn will be recorded and compared and samples
will be analyzed for Paraquat residues in the kernals.


-24-




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