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EVALUATION OF NEONICOTINOIDS FOR CONTROL OF BROWN STINK BUGS ON COTTON, 2001

EVALUATION OF NEONICOTINOIDS FOR CONTROL OF BROWN STINK BUGS ON COTTON, 2001 (F75) COTTON: Gossypium hirsutum L., 'Deltapine 20B' EVALUATION OF NEONICOTINOIDS FOR CONTROL OF BROWN STINK BUGS ON COTTON, 2001 M. M. Willrich and R. H. Jones LSU Agricultural Center Department of Entomology 402 Life Sciences Bldg. Baton Rouge, LA 70803 Phone: (225) 578-1839 Fax: (225) 578-1643 E-mail: mwillr1@lsu.edu B. R. Leonard LSU Agricultural Center Northeast Research Station Macon Ridge Location 212A Macon Ridge Rd. Winnsboro, LA 71295 Brown stink bug (BSB): Euschistus servus (Say) Several neonicotinoids were evaluated for their effectiveness against BSB in small-plot trials conducted at the Macon Ridge location of the Northeast Research Station (Franklin Parish). Plots consisted of 4 rows (40 inches) ´ 30 feet and arranged in a RCB design with three replications. Application dates represented blocks in the experimental design. Treatments were applied on 6, 12, and15 Jun to cotton at the four-leaf growth stage with a tractor-mounted sprayer calibrated to deliver 10 gpa through TeeJet 80015 flat-fan nozzles two per row) at 30 psi. Within 2 h after application (HAI), 30 leaves (first fully expanded leaf below the last fully expanded terminal leaf) were collected per plot. Leaves were placed in petri dishes (100 ´ 15 mm) supplied with moistened filter paper immediately upon removal from the plant. Petri dishes were transported back to the laboratory and infested with one adult BSB. Petri dishes were held in the laboratory under ambient conditions. Percent mortality was determined at 24 and 48 HAI. The criterion for mortality was the inability of the insect to assume an upright posture after removal from the petri dish. Data were analyzed with ANOVA and means separated according to DMRT. No rainfall occurred between the time of insecticide application and foliage removal from field plots. Provado, Centric, and Orthene, provided significantly higher mortality of BSB at 24 HAI compared to that on untreated foliage. Provado produced 31.2% mortality, which was significantly lower than that for Centric and Orthene. BSB mortality in Assail- and Calypso-treated plots was not significantly different from that on untreated foliage. At 48 HAI, cumulative mortality of BSB exposed to Centric and Orthene was significantly higher than that for all other treatments in the test. BSB mortality in the other insecticide treated plots was not significantly different than untreated foliage at 48 HAI. No phytotoxicity was observed during the study period. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EVALUATION OF NEONICOTINOIDS FOR CONTROL OF BROWN STINK BUGS ON COTTON, 2001

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Abstract

(F75) COTTON: Gossypium hirsutum L., 'Deltapine 20B' EVALUATION OF NEONICOTINOIDS FOR CONTROL OF BROWN STINK BUGS ON COTTON, 2001 M. M. Willrich and R. H. Jones LSU Agricultural Center Department of Entomology 402 Life Sciences Bldg. Baton Rouge, LA 70803 Phone: (225) 578-1839 Fax: (225) 578-1643 E-mail: mwillr1@lsu.edu B. R. Leonard LSU Agricultural Center Northeast Research Station Macon Ridge Location 212A Macon Ridge Rd. Winnsboro, LA 71295 Brown stink bug (BSB): Euschistus servus (Say) Several neonicotinoids were evaluated for their effectiveness against BSB in small-plot trials conducted at the Macon Ridge location of the Northeast Research Station (Franklin Parish). Plots consisted of 4 rows (40 inches) ´ 30 feet and arranged in a RCB design with three replications. Application dates represented blocks in the experimental design. Treatments were applied on 6, 12, and15 Jun to cotton at the four-leaf growth stage with a tractor-mounted sprayer calibrated to deliver 10 gpa through TeeJet 80015 flat-fan nozzles two per row) at 30 psi. Within 2 h after application (HAI), 30 leaves (first fully expanded leaf below the last fully expanded terminal leaf) were collected per plot. Leaves were placed in petri dishes (100 ´ 15 mm) supplied with moistened filter paper immediately upon removal from the plant. Petri dishes were transported back to the laboratory and infested with one adult BSB. Petri dishes were held in the laboratory under ambient conditions. Percent mortality was determined at 24 and 48 HAI. The criterion for mortality was the inability of the insect to assume an upright posture after removal from the petri dish. Data were analyzed with ANOVA and means separated according to DMRT. No rainfall occurred between the time of insecticide application and foliage removal from field plots. Provado, Centric, and Orthene, provided significantly higher mortality of BSB at 24 HAI compared to that on untreated foliage. Provado produced 31.2% mortality, which was significantly lower than that for Centric and Orthene. BSB mortality in Assail- and Calypso-treated plots was not significantly different from that on untreated foliage. At 48 HAI, cumulative mortality of BSB exposed to Centric and Orthene was significantly higher than that for all other treatments in the test. BSB mortality in the other insecticide treated plots was not significantly different than untreated foliage at 48 HAI. No phytotoxicity was observed during the study period.

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2002

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