Field Tests with Conventional Low-Volume or Ultra-low-Volume Sprays for Control of the Boll Weevil, Bollworm, and Tobacco Budworm on Cotton in 196712345

1968 ◽  
Vol 61 (4) ◽  
pp. 1114-1116 ◽  
Author(s):  
G. B. Cowan ◽  
J. W. Davis
Keyword(s):  
Field Tests ◽  
Boll Weevil ◽  
Tobacco Budworm ◽  
Low Volume

Registration of Five Cotton Germplasm Lines with Resistance to Bollworm, Tobacco Budworm, and Boll Weevil

Crop Science ◽  
1990 ◽  
Vol 30 (1) ◽  
pp. 235-236 ◽  
Author(s):  
T. W. Culp ◽  
C. C. Green ◽  
B. U. Kittrell
Keyword(s):  
Boll Weevil ◽  
Tobacco Budworm

scholarly journals Evaluation of Selected Insecticide Combinations Against Boll Worm/Tobacco Budworm in Louisiana, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 271-271
Author(s):  
K. D. Torrey ◽  
B. R. Leonard ◽  
J. H. Fife ◽  
J. B. Graves
Keyword(s):  
Cotton Seed ◽  
Boll Weevil ◽  
Test Area ◽  
Tobacco Budworm ◽  
Research Station ◽  
Seed Cotton ◽  
Hollow Cone ◽  
Flower Buds ◽  
Damage Data ◽  
High Clearance

Abstract The efficacy of selected insecticides was evaluated against BW/TBW at the Macon Ridge location of the Northeast Research Station. Cotton seed was planted 12 Jun in plots consisting of 4 rows (40 inch centers) X 50 ft. Treatments were arranged in a RCB design and replicated 4 times. Applications were made with a high clearance sprayer calibrated to deliver 6 gpa through Teejet TX-8 hollow cone nozzles (2/row) at 46 psi. Insecticides were applied on 8, 11, 14, 18 Aug and 11 Sep. Treatments were evaluated by examining 50 flower buds (squares) per plot on 11, 14, 22 Aug for evidence of BW/TBW and boll weevil damage. Data reported for boll weevil represent a mean across all sample dates. The plots were mechanically harvested on 16 Oct to determine seed cotton yields. The test area was irrigated by an overhead sprinkler “as needed” during the season, but not within 48 h of treatment applications. Rainfall did not influence the effects of these treatments. Data were analyzed with ANOVA, and means were separated according to DMRT.

Design of an Attract-and-Kill Device for the Boll Weevil (Coleoptera: Curculionidae)2

1990 ◽  
Vol 25 (4) ◽  
pp. 581-586 ◽  
Author(s):  
G. H. McKibben ◽  
J. W. Smith ◽  
W. L. McGovern
Keyword(s):  
Control Method ◽  
Field Tests ◽  
Boll Weevil ◽  
Cottonseed Oil ◽  
Anthonomus Grandis ◽  
Feeding Stimulants ◽  
Cotton Boll ◽  
Green Pigment ◽  
Attract And Kill ◽  
Crude Cottonseed Oil

Polyvinyl chloride (PVC) was used to formulate a mixture of grandlure, feeding stimulants, and a toxicant as a toxic bait for the cotton boll weevil, Anthonomus grandis (Boheman). Field tests with the PVC formulation revealed that certain aspects of boll weevil orientation dictated placement of the bait device on vertically oriented stakes of about 12 - 24 mm diameter. A stake coating was prepared which contained natural shellac as a binder, cyfluthrin, a green pigment, and crude cottonseed oil. This coating was applied to wooden stakes, with aluminum pans underneath to facilitate counting of dead boll weevils. Bait devices prepared in this manner appeared to be very effective in killing boll weevils. Their advantage over live traps is that they are less expensive and require no service once they are deployed. They have the potential for becoming an important control method for the boll weevil, particularly in the early and late season periods.

Efficacy of the Bollgard Gene in Transgenic Cotton Lines Against Bollworm and Tobacco Budworm, 1995

1997 ◽  
Vol 22 (1) ◽  
pp. 433-434
Author(s):  
J.H. Benedict ◽  
D.R. Ring ◽  
J.C. Correa ◽  
R.E. Buehler ◽  
E.M. Johnson ◽  
...  
Keyword(s):  
Insect Pests ◽  
Boll Weevil ◽  
Transgenic Cotton ◽  
Tobacco Budworm ◽  
Corpus Christi ◽  
Lepidopteran Pests ◽  
Control Target ◽  
Main Plot ◽  
Field Plots ◽  
Cotton Fleahopper

Abstract Transgenic cotton lines expressing an insecticidal protein produced by the crylA(c) gene (i.e., BoUgard Gene), or cryllA gene (Monsanto Co.) from Bacillus thuringiensis kurstaki, and the nontransgenic parent line Coker 312 (COK 312), were planted 25 Apr 1995 near Corpus Christi, Texas. Field plots were 4 row (38 inch centers) X 30 ft. Treatments (i.e., cotton lines) were arranged in a split plot RCB and each plot replicated 6 times. The main plot was lepidopteran control (i.e., with or without lepidopteran sprays of Karate (0.03 lb[AI]/acre) to suppress tobacco budworm, bollworm and other lepidopteran pests) and subplots were 6 cotton lines. Plots for lepidopteran suppression were sprayed on 6, 14, 21, 28 Jul with Karate using a backpack, CO2 powered sprayer and a 2 row handheld spray boom. The entire test was planted with in-furrow insecticide and oversprayed as needed for inseason control of insect pests such as thrips, aphids, boll weevil and cotton fleahopper. Efficacy of transgenic cottons to control target lepidopteran pests was determined by examining 20 flower buds and 20 capsules per plot on 5, 12, 19, 26 Jul for bollworm-tobacco budworm feeding injury, and taking lint yields per plot. Supplemental soil moisture was provided by sprinkler and furrow irrigation during the season but not within 48 h following a lepidopteran control spray. The plots were hand-harvested (13 ft 9 inches from middle 2 rows) and seedcotton ginned on a laboratory 10-saw gin.

Usefulness of Two Diphenzyl Benzoyl Urea Insect Growth Regulators Against the Boll Weevil (Coleoptera: Curculionidae)

1991 ◽  
Vol 26 (4) ◽  
pp. 466-473
Author(s):  
D. A. Wolfenbarger ◽  
S. J. Nemec
Keyword(s):  
Growth Regulators ◽  
Field Tests ◽  
Adult Emergence ◽  
Boll Weevil ◽  
Anthonomus Grandis ◽  
Insect Growth Regulators ◽  
Field Cage ◽  
Insect Growth ◽  
Benzoyl Urea ◽  
Untreated Check

Topical applications at submicrogram levels of the insect growth regulators (IGR) penfluron and diflubenzuron prevented the hatch of boll weevil, Anthonomus grandis Boheman, eggs. Neither compound was toxic to the weevil, however field-cage studies showed that diflubenzuron greatly reduced emergence of weevils from squares. In all field tests spray applications were initiated at first one-third grown square (<1 cm dia) and continued for 13 to 17 applications during 51 days, throughout the cotton growing season on a 3–5 day schedule. In 1981, cotton sprayed with penfluron diluted in water plus petroleum oil had significantly greater yields than cotton sprayed with penfluron only. In 1982, diflubenzuron and penfluron diluted in oil and water and applied at 0.07 kg/ha, reduced boll weevil emergence from squares 57 to 78% compared to emergence in untreated plots. In 1983, emergence of adults from bolls was reduced 39% in plots sprayed with diflubenzuron at a rate of 0.28 kg A.I./ha. In 1981, no reduction in adult emergence from bolls only was observed in plots sprayed with penfluron at rate of 0.07 kg A.I./ha; when penfluron was applied at 3 day intervals in oil boll weevil emergence from squares was significantly reduced. Yields of seed cotton were significantly greater in plots sprayed on a 3–5 day schedule with penfluron or diflubenzuron in oil, at a rate of 0.07 or 0.28 kg A.I./ha respectively, when compared to the untreated check; they were 926, 1697 to 1874, and 726 kg/ha in 1981, 1982, and 1983, respectively, In 1981 and 1982, predator populations (mostly Hemiptera and spiders) in plots sprayed with either diflubenzuron or penfluron, with or without oil, were reduced significantly compared to populations in the untreated check.

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