Abstract
Abstract Selected insecticide/acaricides were evaluated for efficacy against TSSM in cv. ‘NC 7’ Virginia-type peanut in Isle of Wight County, VA. Peanuts were planted on 4 May using a 36-inch row spacing. All treatments were applied on 28 Jul. The Comite + 5 d treatment was applied again on 5 Aug. Karate, at the 0.025 and 0.04 lb (AI)/acre rates, Capture C, and Danitol were applied again on 9 Aug. All were applied using a CO2 pressurized backpack sprayer calibrated to deliver 14.5 gpa at 50 psi through three D2-13 disc-core hollow cone spray nozzles per row, 1 over the top and 1 on each side. A RCB experimental design was used with 4 replicates; plots were 4 rows by 15 ft. Treatments were evaluated on 28, 31 Jul and on 3, 7, 11, 16, 22 and 29 Aug by comparing the number of live mites in a 1.5 cm diam area on 2 randomly selected leaflets per plot. Mite counts were made in the field using 10x magnification lenses. Data were analyzed using ANOVA and LSD statistical procedures. Cumulative mite-days (CMD) were calculated for each treatment over the entire test period using Σ(Xi+1 – Xi)[(Yi + Yi+1)/2], where Xi and Xi+1 are adjacent sample dates and Yi and Yi+1 are corresponding points of mean mite number per leaflet.
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