Treatment Timing for Control of Southern Corn Rootworm Injury in Peanut, 1990

Abstract

Abstract Selected insecticides applied at different times were evaluated for control of SCR pod injury in cv. NC 7 virginia-type peanut in Suffolk, Va. Peanuts were planted on 3 May using a 36- inch row spacing. Treatments were applied at planting time, either in furrow or banded, at flowering time (18 Jun), at pegging time (17 Jul), or at late pegging time (6 Aug). In-furrow treatments were applied with seed into the furrow. All banded treatments were applied in a 14-inch band using an electrically driven, tractor-mounted Noble metering unit. At-planting bands were directed in front of the planters, then soil incorporated 3-4 inches deep with rolling cultivator gangs. Flowering, pegging, and late-pegging bands were applied over rows. Flowering and pegging treatments were lightly soil incorporated with cultivator sweeps in row middles. Late-pegging bands were not soil incorporated. A randomized complete block experimental design was used with 4 replicates; plots were 4 rows by 40 ft. Pod injury was determined on 17 Sep from 100 randomly selected pods per plot, taken from 5 plants per plot (20 pods/plant). Yield was based on digging, combining (28 Sep), drying and weighing peanuts from the 2 center rows of each plot. Data were analyzed using ANOVA and LSD statistical procedures.