Abstract
Abstract This field test was conducted in conventionally planted and tilled soybeans at the Plant Breeding Unit of Auburn University, Tallassee, Ala. Four replicates of 15 treatments and an untreated control were planted in a randomized complete block design. Each 0.014-acre plot was 4 rows wide (36-inch row spacing) and 50-ft long. Plots were separated by 2 border rows of soybeans and replicates were separated by a 25-ft mowed alley. Treatments were applied on 21 Sep using a tractor-mounted boom sprayer equipped with 2, TX-3 hollow cone nozzles/row operating at 40 psi and delivering 6 gal/acre. A sweep net was used to sample velvetbean caterpillar larvae. Larvae were classified as small (instar 1-2), medium (instar 3-4), or large (5 + ); they were then counted and recorded. Then sweeps per plot were taken prior to treatment and 20 sweeps/plot were taken at 3 and 6 DAT.
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