EFFICACY OF SELECTED INSECTICIDES ALONE AND TANK MIXED WITH A FUNGICIDE FOR CONTROL OF LEPIDOPTERAN PESTS IN SOYBEANS, 2012 (TEST 1)

On 27 August 2012, a foliar insecticide study was conducted in soybeans on the Black Belt Branch Experiment Station in Brooksville, MS. Soybeans were at approximately R5 stage of maturity. Plots were designed in a randomized complete block with four replications. Plot size was 4 rows by 50 ft long on 38 in centers. Six insecticide treatments and one fungicide treatment (Quadris) were evaluated against the untreated control (UTC) for control of soybean looper (SBL), velvetbean caterpillar (VBC), and the green cloverworm (GCW). Insecticides were applied with a tractor-mounted sprayer calibrated to deliver 10.0 gpa at 60 psi through TX-6 Hollow Cone nozzles (2 per row). There were two sample dates following the application of treatments: 4 days after treatment (4 DAT) and 8 day after treatment (8 DAT). Plots were sampled by taking 25 sweeps per plot with a sweep net and recording the number of SBL, VBC, and GCW larvae per 25sweep sample. Data was analyzed with ANOVA and means were separated using Fisher’s Protected LSD (P≤0.10).