Soybean Looper and Beet Armyworm Control on Soybean in Louisiana, 1995

Abstract

Abstract The efficacy of selected insecticides for control of soybean looper (SBL) and beet armyworm (BAW) was determined in 3 small plot insecticide trials conducted at the Northeast Research Station near St. Joseph, LA (Tensas Parish). Treatments were applied to ‘Deltapine 105’ soybeans in the R5 growth stage using a high clearance, compressed air sprayer calibrated to deliver 10 gpa through TX12 hollow cone nozzles (2/row) at 45 psi. Plots were 50 ft long by 4 rows (40 inch row spacing) and were arranged in a RCBD with 4 replications. Treatments were applied on 23, 24, and 29 Aug in Tests I, II, and III, respectively. One 25-sweep sample was taken from each plot with a standard 15 inch diameter sweep net at 2, 5, and 7 DAT in Test I; 2, 5, and 8 DAT in Test II; and 2 and 8 DAT in Test III. No rainfall occurred during Test I and II; a trace amount occurred on 4 Sep during Test III. The data were analyzed by ANOVA and treatment means separated by DMRT.