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Group Title: Research report - Bradenton GCREC - BRA1987-7
Title: Evaluation of herbicides for cabbage
CITATION PAGE IMAGE ZOOMABLE PAGE TEXT
Full Citation
STANDARD VIEW MARC VIEW
Permanent Link: http://ufdc.ufl.edu/UF00067775/00001
 Material Information
Title: Evaluation of herbicides for cabbage fall 1985
Series Title: Bradenton GCREC research report
Physical Description: 9 leaves : ; 28 cm.
Language: English
Creator: Gilreath, J. P ( James Preston ), 1947-
Gilreath, Phyllis
Gulf Coast Research and Education Center (Bradenton, Fla.)
Publisher: Gulf Coast Research & Education Center, IFAS, University of Florida
Place of Publication: Bradenton FL
Publication Date: 1987
 Subjects
Subject: Cabbage -- Diseases and pests -- Control -- Florida   ( lcsh )
Herbicides -- Testing -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: J.P. Gilreath and P.R. Gilreath.
General Note: Caption title.
General Note: "March 1987."
Funding: Florida Historical Agriculture and Rural Life
 Record Information
Bibliographic ID: UF00067775
Volume ID: VID00001
Source Institution: Marston Science Library, George A. Smathers Libraries, University of Florida
Holding Location: Florida Agricultural Experiment Station, Florida Cooperative Extension Service, Florida Department of Agriculture and Consumer Services, and the Engineering and Industrial Experiment Station; Institute for Food and Agricultural Services (IFAS), University of Florida
Rights Management: All rights reserved, Board of Trustees of the University of Florida
Resource Identifier: oclc - 73703618

Table of Contents
    Copyright
        Copyright
    Introduction
        Page 1
    Results
        Page 2
    Tables
        Page 3
        Page 4
        Page 5
        Page 6
        Page 7
        Page 8
        Page 9
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






Gulf Coast Research & Education Center
IFAS, University of Florida
5007 60th Street East
Bradenton, Florid S..
S. | Central Sc'e ce
Bradenton GCREC Research Report BRA1987-7 Library


1987


Evaluation of Herbicideb for Car-gge 198q7
Fall 1985

J. P. Gilreath and P. R. GVIl Wfeg of Florida

Pre- and posttransplant applications of herbicides were evaluated for weed control
and phytotoxicity to nonmulched 'Conquest' cabbage in the fall of 1985. Ten plants
were transplanted 1.5 feet apart in a single row on 30 inches wide, 6 inches high
raised beds on 7 Oct. 1985. Single bed plots were 20 feet long with rows (beds)
spaced 4.5 feet apart on centers and were arranged in a randomized complete block
design with 4 replications. Soil in the experimental area was an EauGallie fine
sand with a pH of 6.0 and 0.7% organic matter content and was not fumigated. Four
Ib.a.i./acre of Dyfonate 8E insecticide was applied to the soil surface and
incorporated with a rototiller on 1 Oct. 1985 to control mole crickets which were
present in very high numbers prior to application. Irrigation was supplied
throughout the season by seepage irrigation. Fertilization consisted of 1500
lb./acre of 6-6-6 and 425 lb./acre of Osmocote 14-14-14 slow release fertilizer
applied and incorporated 1 Oct. 1985 and a side dressing of 100 lb./acre of
ammonium nitrate applied 20 Nov. 1985. Normal disease and insect control practices
were maintained for the season.

Treatments evaluated were as follows and were applied with a CO2 back pack sprayer.
Pretransplant treatments were applied 7 October 1985. Posttransplant applications
of Cinch (treatments 3 and 12), Cinch + Dacthal (treatment 4), and Cinch + Goal
(treatment 5) were made 8 October 1985. A second application of Bolero was applied
to plots assigned to treatment 11.


Treatment


Rate (Ib.a.i./A)


Method of application


1. Weedy check
2. Hand weeded check
3. Cinch
4. Cinch +
Dacthal
5. Cinch +
Goal
6. Dacthal
7. Goal
8. Bolero
9. Bolero
10. Bolero
11. Bolero +
Bolero
12. Cinch


0.75
0.60
8.0
0.60
0.50
8.0
0.5
6.0
8.0
10.0
10.0
2.0
1.5


1Associate Professor of Weed Science and
Extension Service, respectively.


posttransplant
posttransplant
as a tank mix
posttransplant
pretransplant
pretransplant
pretransplant
pretransplant
pretransplant
pretransplant
pretransplant
posttransplant (layby)
posttransplant


Extension Agent I, Fla. Cooperative


-


--






RESULTS


Slight reductions in crop plant vigor were observed with Cinch alone (0.75 Ib.ai/A)
and Goal alone, while Cinch at 1.5 lb.a.i./A and a combination of Goal + Cinch was
quite injurious (Table 1).

At the beginning of the season, the principal weeds were goosegrass (Eleusine
indica) and pigweed (Amaranthus viridus), whereas, by the second evaluation date,
the population was 35% goosegrass, 10% bermudagrass (Cynodon dactylon), 50%
pigweed, and 5% eclipta (Eclipta alba). All herbicide treatments provided good to
excellent early season control of goosegrass and pigweed, except 10 lb. a.i./A
Bolero and Dacthal which provided very poor control of goosegrass (Table 1). This
trend for control of goosegrass continued through to harvest (Table 2). None of
the herbicides provided adequate control (rating of 7.0 or greater) of
bermudagrass. Only Cinch and the combination of Cinch + Dacthal provided late
season control of pigweed comparable to hoeing. Control of eclipta was not
acceptable with Dacthal or Bolero.

Marketable cabbage heads were harvested 3 times beginning 13 December 1985 and
culls were also harvested in the last harvest. Bolero (8 lb.) and Cinch (1.5 lb.)
reduced the number of heads cut in the first harvest, whereas only Cinch (1.5 lb.)
decreased the weight of heads when compared with hoeing (Table 3). There were no
differences among treatments for number or weight of marketable or cull heads at
either of the other 2 harvests (Tables 4 and 5). When combined over the three
harvest season, no herbicide treatment reduced the number of marketable or cull
heads or the weight of culls; however, significantly less weight of marketable
heads was produced in plots treated with Cinch (both rates), Goal + Cinch, and
Dacthal (Table 6). It was interesting to note that Cinch + Dacthal did not produce
a similar decrease in marketable head weight. Total head production (number) was
significantly lower with Bolero (8 lb.) and the high rate of Cinch (Table 7) than
was observed with hoeing. Total weight of heads produced (both marketable and
cull) was decreased (relative to hoeing) in plots treated with Cinch (both rates),
Goal + Cinch, and Dacthal.

Although several of the treatments were injurious in this experiment, even the
labeled standard, Dacthal, reduced yield. Since many of these treatments provided
weed control either comparable or superior to Dacthal, it appears these treatments
are worth examining again and may possibly be acceptable to the grower industry
even with the potential for injury.

Mention of a specific proprietary product does not constitute an endorsement by the
authors, the University of Florida, or the Cooperative Extension Service.
Individuals desiring information regarding currently labeled herbicides for a crop
are encouraged to contact their county extension agent.








Table 1. Effect of herbicide treatment on
transplanted 'Conquest' cabbage. Bradenton, FL.


plant vigor and weed control in
28 October 1985.


Rate Vigor Weed control rating
Treatment (lb.a.i./A) rating ELEINY AAVIY


Weedy check -- 10.0 ax 0.0 d 0.0 b

Hoed check -- 10.0 a 10.0 a 10.0 a

Cinchw 0.75 8.0 b 9.9 a 8.6 a

Cinchw 1.5 5.2 d 10.0 a 9.8 a

Cinch + 0.60 8.8 ab 10.0 a 9.5 a
SDacthalw 8.0

Goalv + 0.50 6.6 c 10.0 a 10.0 a
Cinchw 0.60

Dacthalv 8.0 9.5 a 4.8 c 9.1 a

Goalv 0.50 8.0 b 10.0 a 10.0 a

Bolerov 6.0 9.6 a 10.0 a 10.0 a

Bolerov 8.0 9.1 ab 10.0 a 10.0 a

Bolerov 10.0 9.4 a 7.5 b 8.0 a

Bolerov + 10.0 8.8 ab 10.0 a 10.0 a
Bolerow 2.0


ZPlant vigor was evaluated using a pretransformed 0 to 10 rating scale where 0
indicates all plants were dead and 10 represents no injury.

YWeed control was evaluated using a pretransformed 0 to 10 rating scale where 0
indicates no control and 10 represents complete control. Weeds present were
ELEIN (Eleusine indica, goosegrass) and AMAVI (Amaranthus viridis, pigweed).

XTreatment means within columns followed by the same letter are not significantly
different at the 5% level as determined by Duncan's new multiple range test.

WApplied posttransplant.

VApplied pretransplant.









Table 2. Effect of herbicide treatment on weed control in transplanted 'Conquest'
cabbage. Bradenton, FL. 2 December 1985.


Rate Weed control ratingZ
Treatment (lb.a.i./A) ELEINY CYNDA AMAVI ECLAL


Weedy check --- 0.0 dx 0.8 c 0.0 e 2.8 c

Hoed check -- 10.0 a 10.0 a 10.0 a 10.0 a

Cinchw 1.5 10.0 a 6.0 b 7.8 abc 8.6 ab

Cinchw 0.75 10.0 a 6.6 ab 7.6 abc 8.4 ab

Cinch + 0.60 9.9 a 3.2 bc 8.4 ab 8.9 ab
Dacthalw 8.0

Goalv + 0.50 9.5 a 4.6 bc 7.2 bc 7.6 ab
Cinch" 0.60

Dacthalv 8.0 4.5 c 3.2 bc 7.2 bc 5.9 b

Goalv 0.50 9.6 a 2.8 bc 7.1 bc 7.4 ab

Bolerov 6.0 9.3 a 3.7 bc 6.0 bc 6.5 b

Bolerov 8.0 8.6 ab 5.4 b 2.8 d 2.5 c

Bolerov 10.0 7.0 b 5.2 b 2.5 d 6.8 b

Bolerov + 10.0 9.6 a 3.8 bc 5.6 c 6.5 b
Bolerow 2.0



ZWeed control was evaluated using a pretransformed 0 to 10 rating scale where 0
indicates no control and 10 represents complete control.

YELEIN = goosegrass, CYNDA = bermudagrass, AMAVI = pigweed, and ECLAL =
yerba-de-tago, also known as Eclipta alba.

XTreatment means within columns followed by the same letter are not significantly
different at the 5% level as determined by Duncan's new multiple range test.

WApplied posttransplant.

VApplied pretransplant.








Table 3. Effect of herbicide treatment on yield of transplanted 'Conquest'
cabbage. Bradenton, FL. 13 December 1985.


Rate Marketable heads
Treatment (lb.a.i./A) Number Weight (lb.)


Weedy check -- 1.5 d 4.2 c

Hoed check 7.8 a 31.7 a

Cinchw 0.75 5.5 abc 21.1 ab

Cinchw 1.5 3.8 cd 10.6 bc

Cinch + 0.60 6.8 ab 23.7 a
Dacthalw 8.0

Goalv + 0.50 5.2 abc 20.2 ab
Cinchw 0.60

Dacthalv 8.0 6.8 ab 21.4 ab

Goalv 0.50 6.2 abc 26.4 a

Bolerov 6.0 7.2 ab 27.3 a

Bolerov 8.0 4.8 bc 27.7 a

Bolerov 10.0 6.5 ab 23.2 a

Bolerov + 10.0 7.5 ab 29.6 a
Bolerow 2.0



ZTreatment means within columns followed by the same letter are not significantly
different at the 5% level as determined by Duncan's new multiple range test.

WApplied posttransplaht.

VApplied pretransplant.









Table 4. Effect of herbicide treatment on yield of transplanted
cabbage. Bradenton, FL. 19 December 1985.


'Conquest'


Rate Marketable heads
Treatment (lb.a.i./A) Number Weight (lb.)


Weedy check -- 2.8 a 5.1 a

Hoed check 1.8 a 6.2 a

Cinchw 0.75 2.0 a 4.6 a

Cinchw 1.5 3.8 a 9.3 a

Cinch + 0.60 2.5 a 8.1 a
Dacthalw 8.0

Goalv + 0.50 2.0 a 5.5 a
Cinchw 0.60

Dacthalv 8.0 1.8 a 5.8 a

Goalv 0.50 2.5 a 7.5 a

Bolerov 6.0 1.8 a 7.4 a

Bolerov 8.0 2.5 a 8.2 a

Bolerov 10.0 3.0 a 8.4 a

Bolerov + 10.0 2.5 a 8.3 a
Bolerow 2.0


ZTreatment means within columns followed by the same
different at the 5% level as determined by Duncan's

WApplied posttransplant.

YApplied pretransplant.


letter are not significantly
new multiple range test.








Table 5. Effect of herbicide treatment on yield of transplanted 'Conquest'
cabbage. Bradenton, FL. 30 December .1985.


Rate Marketable heads Cull heads
Treatment (Ib.a.i./A) Number Wt.(lb.) Number Wt.(lb.)


Weedy check -- 4.0 az 6.3 a 1.2 a 1.1 a

Hoed check -- 0.8 a 1.3 a 0.0 a 0.0 a

Cinchw 0.75 1.2 a 3.2 a 0.5 a 0.3 a

Cinchw 1.5 0.5 a 1.2 a 0.0 a 0.0 a

Cinch + 0.60 0.5 a 1.2 a 0.0 a 0.0 a
Dacthalw 8.0

Goalv + 0.50 1.5 a 3.0 a 0.5 a 0.3 a
Cinchw 0.60

Dacthalv 8.0 0.5 a 0.8 a 0.0 a 0.0 a

Goalv 0.50 0.5 a 1.2 a 0.0 a 0.0 a

Bolerov 6.0 0.0 a 0.0 a 0.8 a 0.4 a

Bolerov 8.0 0.5 a 1.4 a 0.0 a 0.0 a

Bolerov 10.0 0.2 a 0.5 a 0.2 a 0.1 a

Bolerov + 10.0 0.0 a 0.0 a 0.0 a 0.0 a
Bolerow 2.0



ZTreatment means within columns followed by the same letter are not significantly
different at the 5% level as determined by Duncan's new multiple range test.

WApplied posttransplant.

VApplied pretransplant.









Table 6. Effect of herbicide treatment on seasonal total
!Conquest' cabbage. Bradenton, FL. December 1985.


yield of transplanted


Rate Marketable heads Cull heads
Treatment (lb.a.i./A) Number Wt.(lb.) Number Wt.(lb.)


Weedy check -- 8.2 az 15.6 d 1.2 a 1.1 a

Hoed check -- 10.2 a 39.2 a 0.0 a 0.0 a

Cinch' 0.75 8.8 a 29.0 bc 0.5 a 0.3 a

Cinchw 1.5 8.0 a 21.2 cd 0.0 a 0.0 a

Cinch + 0.60 9.8 a 32.9 ab 0.0 a 0.0 a
Dacthalw 8.0

Goalv + 0.50 8.8 a 28.6 bc 0.5 a 0.3 a
SCinchw 0.60

Pacthalv 8.0 9.0 a 28.0 bc 0.0 a 0.0 a

Goalv 0.50 9.2 a 35.1 ab 0.0 a 0.0 a

polerov 6.0 9.0 a 34.7 ab 0.8 a 0.4 a

Bolerov 8.0 7.8 a 37.4 ab 0.0 a 0.0 a

Bolerov 10.0 9.8 a 32.2 ab 0.2 a 0.1 a

Bolerov + 10.0 10.0 a 38.0 ab 0.0 a 0.0 a
Bolerow 2.0


eTreatment means within columns followed by the same letter are not significantly
different at the 5% level as determined by Duncan's new multiple range test.
"Applied posttransplant.

VApplied pretransplant.









Table 7. Effect of herbicide treatment on seasonal total yield
tConquest' cabbage. Bradenton, FL. December 1985.


of transplanted


Rate Total heads
iTreatment (lb.a.i./A) Number Wt.(lb.)


Weedy check -- 9.5 abcz 16.6 e

Hoed check -- 10.2 a 39.2 a

Cinch' 0.75 9.2 abc 29.2 bcd

Cinchw 1.5 8.0 bc 21.2 de

Cinch + 0.60 9.8 abc 32.9 abc
i Dacthalw 8.0

Goalv + 0.50 9.2 abc 29.0 bcd
Cinchw 0.60

Dacthalv 8.0 9.0 abc 28,0 cd

Goalv 0.50 9.2 abc 35.1 abc

Bolerov 6.0 9.8 abc 35.1 abc

Bolerov 8.0 7.8 c 37.4 abc

Bolerov 10.0 10.0 ab 32.2 abc

Bolerov + 10.0 10.0 ab 38.0 ab
Bolerow 2.0


ZTreatment means within columns followed by the same
different at the 5% level as determined by Duncan's

WApplied posttransplant.

VApplied pretransplant.


letter are not significantly
new multiple range test.




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