(F107) SOYBEAN: Glycine max L., 'Pioneer 9594' J. H. Temple LSU AgCenter Northeast Research Station, Macon Ridge Location 212A Macon Ridge Rd Winnsboro, LA 71295 Tel: (318) 435-2157 Fax: (318) 435-2133 email@example.com R. H. Gable B. R. Leonard Soybean looper (SBL): Pseudoplusia includens (Walker) Soybean seed were planted into a Gigger-Gilbert silt loam soil on 7 Jun at the Macon Ridge location of the Northeast Research Station. Plot size was four rows (40 inch) x 50 ft. Treatments were arranged in a RCBD with five replications. Insecticides were applied on 21 Aug with a John Deere high clearance sprayer and CO charged system calibrated to deliver 6 gpa through Teejet TX-8 hollow cone nozzles (2/row) at 46 psi. Treatment efficacy against Soybean looper (SBL) larvae was determined at 2 and 9 DAT using a standard (15 inch diameter) sweep net and taking a 25 sweep sample in each plot. A total rainfall of 0.38 inch occurred during the test. Data were subjected to ANOVA and means separated according to DMRT. Numbers of SBL larvae exceeded 2 insects/sweep just prior to the application of treatments. All insecticides significantly reduced numbers of SBL larvae compared to that in the non-treated plots at 2 DAT and 9 DAT. Numbers of SBL larvae in the Intrepid (0.0313 lb AI/acre) treated plots were significantly higher than in the Steward, Tracer, and Larvin treated plots at 2 DAT. All insecticide treatments significantly reduced SBL larval densities compared to that in the non-treated control at 9 DAT. No phytotoxicity from any insecticide treatment was observed during the test.
Arthropod Management Tests – Oxford University Press
Published: Jan 1, 2003