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EVALUATION OF INSECTICIDES FOR CONTROL OF NYMPH AND ADULT SOUTHERN GREEN STINK BUGS, 2002

EVALUATION OF INSECTICIDES FOR CONTROL OF NYMPH AND ADULT SOUTHERN GREEN STINK BUGS, 2002 (F77) COTTON: Gossypium hirsutum L., 'Phytogen 355' EVALUATION OF INSECTICIDES FOR CONTROL OF NYMPH AND ADULT SOUTHERN GREEN STINK BUGS, 2002 M. M. Willrich LSU AgCenter Department of Entomology 402 Life Sciences Bldg. Baton Rouge, LA 70803 Tel: (225) 578-1839 Fax: (225) 578-1643 mwillrich@agctr.lsu.edu J. Temple LSU AgCenter Northeast Research Station 212A Macon Ridge Rd. Winnsboro, LA 71295 R. H. Gable B. R. Leonard Southern green stink bug (SGSB): Nezara viridula (L.) The efficacy of selected insecticides was evaluated against Southern green stink bug (SGSB) nymphs and adults on cotton bolls at the Macon Ridge location of the Northeast Research Station (Franklin Parish). Plots of cotton plants (growth stage of 3-4 main stem nodes above the uppermost white flower located on the first position of a fruiting branch) were 4 rows (40-inch) x 50 ft. Treatments were arranged in a RBD with four replications and applied on 16 Aug with a high-clearance sprayer calibrated to deliver 6 gpa through TX-8 hollow cone nozzles (2/row) at 40 psi. At 2-3 h after application, 20 bolls (uppermost, first position quarter- size, one/plant) were collected in each plot. Each boll was placed in a 3 oz plastic specimen vial and transported to the laboratory. Ten vials were infested with one SGSB nymph (4-5th instar) and 10 vials were infested with one SGSB adult. Specimen vials were stored in the laboratory under ambient conditions (ca. 80°F). Percent mortality was determined at 24, 48, and 72 h after infestation (HAI). The criterion for mortality was the inability of the insect to assume an upright posture within 5 second after being dislodged from the vial. Data were analyzed with ANOVA and means separated according to DMRT. No rainfall occurred between insecticide application and removal of bolls from the field. At 24, 48, and 72 HAI, bolls treated with Karate-Z or methyl parathion resulted in mortality of SGSB nymphs significantly greater than that on untreated bolls. SGSB adult mortality at 24 HAI was significantly greater for all treatments compared to that on untreated bolls. At 48 and 72 HAI, cumulative mortality of SGSB adults exposed to Karate-Z, Orthene, and methyl parathion-treated bolls was significantly greater than that on Vydate and untreated bolls. No phytotoxicity from insecticides was observed during the test. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EVALUATION OF INSECTICIDES FOR CONTROL OF NYMPH AND ADULT SOUTHERN GREEN STINK BUGS, 2002

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Publisher
Oxford University Press
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© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/28.1.F77
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Abstract

(F77) COTTON: Gossypium hirsutum L., 'Phytogen 355' EVALUATION OF INSECTICIDES FOR CONTROL OF NYMPH AND ADULT SOUTHERN GREEN STINK BUGS, 2002 M. M. Willrich LSU AgCenter Department of Entomology 402 Life Sciences Bldg. Baton Rouge, LA 70803 Tel: (225) 578-1839 Fax: (225) 578-1643 mwillrich@agctr.lsu.edu J. Temple LSU AgCenter Northeast Research Station 212A Macon Ridge Rd. Winnsboro, LA 71295 R. H. Gable B. R. Leonard Southern green stink bug (SGSB): Nezara viridula (L.) The efficacy of selected insecticides was evaluated against Southern green stink bug (SGSB) nymphs and adults on cotton bolls at the Macon Ridge location of the Northeast Research Station (Franklin Parish). Plots of cotton plants (growth stage of 3-4 main stem nodes above the uppermost white flower located on the first position of a fruiting branch) were 4 rows (40-inch) x 50 ft. Treatments were arranged in a RBD with four replications and applied on 16 Aug with a high-clearance sprayer calibrated to deliver 6 gpa through TX-8 hollow cone nozzles (2/row) at 40 psi. At 2-3 h after application, 20 bolls (uppermost, first position quarter- size, one/plant) were collected in each plot. Each boll was placed in a 3 oz plastic specimen vial and transported to the laboratory. Ten vials were infested with one SGSB nymph (4-5th instar) and 10 vials were infested with one SGSB adult. Specimen vials were stored in the laboratory under ambient conditions (ca. 80°F). Percent mortality was determined at 24, 48, and 72 h after infestation (HAI). The criterion for mortality was the inability of the insect to assume an upright posture within 5 second after being dislodged from the vial. Data were analyzed with ANOVA and means separated according to DMRT. No rainfall occurred between insecticide application and removal of bolls from the field. At 24, 48, and 72 HAI, bolls treated with Karate-Z or methyl parathion resulted in mortality of SGSB nymphs significantly greater than that on untreated bolls. SGSB adult mortality at 24 HAI was significantly greater for all treatments compared to that on untreated bolls. At 48 and 72 HAI, cumulative mortality of SGSB adults exposed to Karate-Z, Orthene, and methyl parathion-treated bolls was significantly greater than that on Vydate and untreated bolls. No phytotoxicity from insecticides was observed during the test.

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2003

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