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Group Title: Budworm control on sweet corn
Title: Budworm control on sweet corn. Summer 1985
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Permanent Link: http://ufdc.ufl.edu/UF00075813/00004
 Material Information
Title: Budworm control on sweet corn. Summer 1985
Series Title: Budworm control on sweet corn.
Translated Title: Research Report - University of Florida Central Florida Research and Education Center ; 86-05 ( English )
Physical Description: Serial
Language: English
Creator: Leibee, Gary L.
Publisher: University of Florida, Central Florida Research and Education Center
Publication Date: 86-05
 Record Information
Bibliographic ID: UF00075813
Volume ID: VID00004
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 144607564

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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




/ u




University of Florida

CENTRAL FLORIDA RESEARCH AND EDUCATION CENTER

Sanford, Florida

Research Report SAN 86-05 September 1985

BUDWORM CONTROL ON SWEET CORN, SUMMER 1985

Gary L. Leibee


"Bonanza'sweet corn was planted May 23, 1985, in Myakka fine sand
on the University of Florida's Central Florida Research and Education
Center in Sanford. Lasso 15G 3 lb ai/acre and Furadan 15G 2 lb ai/acre
were incorporated in a 10" band at planting time for weed and nematode
control, respectively. Treatments were applied to single-row plots 40'
long with 12" plant spacing. Treatment rows were separated by one
untreated row; row spacing was 30". Treatments were replicated 5 times
in randomized complete blocks separated by 10' weed-free alleys. Sprays
were applied with a C02 pressurized sprayer mounted on an Allis-Chalmers
model G tractor. Three nozzles (D3-45) were used per row; one overhead
and one drop on each side. The delivery rate was 50 gpa with a boom
pressure of about 50 psi and a speed of 3 mph. Sprays were applied on
June 20, 24, and 27, 1985. Twenty plants per plot were rated for damage
on July 1, 1985, as follows: 1=very small amount of damage to whorl,
little etching; 1.5=very small amount of damage to whorl, but much more
etching present than in 1; 2=some feeding damage from larger instars
evident in whorl; 2.5=severe damage to whorl; 3=whorl ragged, tassle
destroyed. Damage ratings were taken when tassles were beginning to
emerge (shoot) from whorl.

The infestation of fall armyworm, SpodoDtera frugiperda, was
considered heavy. Lannate 1.8L at .9 lb ai/acre and the IGRs, UC 84572
and UC 86874, at .05 and .1 lb ai/acre were the only treatments that
gave acceptable control. No phytotoxicity was observed.










Insecticide and lb ai/acre Damage rating*


Untreated check 3.0 a

Water only 3.0 a

Pydrin 2.4EC .2 2.5 b

Lannate 1.8L .9 1.4 d

UC 76963 2.1EC .25 3.0 a

UC 76963 2.1EC .5 3.0 a

UC 76963 2.1EC .75 3.0 a

UC 27BF25 70W 1.0 3.0 a

UC 27BF25 70W 2.0 3.0 a

Furadan 4F .5 3.0 a

UC 84572 .85EC .05 2.1 c

UC 84572 .85EC .1 1.5 d

UC 84572 .85EC .05
+ Lannate 1.8L .2 1.4 d

UC 86874 .42EC .05 1.5 d

UC 86874 .42EC .1 1.6 d



*Means followed by the same letter are not significantly different at
*the 5% level by DMRT. Damage ratings were transformed (squared) prior
to analysis.




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