EFFICACY OF FOLIAR INSECTICIDES AGAINST TARNISHED PLANT BUG ON COTTON (TEST 1), 2009
Arthropod Management Tests
Tarnished Plant bug, Lygus lineolaris (Palisot de Beauvois) On 15 Jul and 21 Jul 2009, a foliar insecticide efficacy trial was conducted in a commercial cotton field in Tallahatchie Co., MS. At time of application, cotton plants were 48 inches tall and approximately in the second week of bloom. Plot size was 4 rows by 100 ft long on 38 inch centers. Statistical design was a RCB with 4 replications. Insecticides were applied with a tractor-mounted sprayer calibrated to deliver 10.0 gpa at 60 psi
... 10.0 gpa at 60 psi through TX-6 Hollow Cone nozzles (2 per row). Two drop cloth samples of 5-row ft each were taken per plot 5 days after treatment one (5 DAT1) and six days after treatment two (6 DAT2) for a total sample size of 10-row foot per plot. Data were analyzed with ANOVA and means were separated using a Fisher's Protected LSD (P = 0.1). No treatments significantly reduced the number of tarnished plant bugs compared to the non-treated control at 5 DAT 1. However, at 6 DAT 2, Belay at 0.05 lb AI/A and 0.0666 lb AI/A were the only treatments that did not statistically separate from the untreated control. All other treatments in the trial significantly reduced tarnished plant bug densities compared to the untreated control.