Abstract
Abstract A field test was conducted at the Macon Ridge location of the Northeast Research Station near Winnsboro, LA, to evaluate the efficacy of selected insecticides against beet armyworms on cotton. Plots were planted on 4 Jun. Test plots were arranged in a RCBD and replicated 4 times with plots of 4 rows (40 inch centers) by 50 ft. Treatments were applied on 6 Sep with a high clearance sprayer calibrated to deliver 11.6 gpa through Teejet X-8 hollow cone nozzles (2/row) at 44 psi. Treatment efficacy was determined by taking 2 drop-cloth (3 ft X 3 ft) samples on a different row at each sample date. Samples were taken at 3, 5 and 7 DAT. Data were converted to percent control based on populations of beet armyworm observed in the untreated plots at each observational period. Data were analyzed using ANOVA followed by means separation according to Fisher’s Protected LSD. No rainfall occurred during the experimental period.
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