Control of Small, Medium and Large Corn Earworms and Impact of Treatments on Nabids and Total Predators on Peanuts in Alabama, 1983

Abstract

Abstract This field test was conducted on peanuts planted in a light clay loam soil at the Wiregrass Substation of the Auburn University Ag. Expt Station at Headland, Ala. Three treatments and an untreated check were replicated two times in a randomized complete block design. Each plot was 0.25 acres (ca. 25 rows by 150 ft) using a 36-in. row spacing with each ‘row’ being two 7-in. separated double rows. Treatments were applied on 12 Aug. with a tractor-mounted boom sprayer equipped with three TX6 hollow cone nozzles per row operating at 40 lb/in2 and delivering 15 gal/acre. Insect populations were sampled by placing a standard 3-ft beat sheet between the rows and beating the plants on both sides. Corn earworm larvae, nabids, and predators were sight identified, counted and recorded. Corn earworm larvae were separated into small, medium, and large. Three samples from each plot were taken 3, 5, and 12 days postspray 15, 17 and 24 Aug.