EFFICACY OF FOLIAR INSECTICIDES AGAINST TWOSPOTED SPIDER MITE ON COTTON, 2009

On 7 Jul, a foliar insecticide efficacy trial was conducted in cotton at the Plant Science Research Station in Oktibbeha Co., MS. At time of application, cotton plants were heavily infested with mites and near bloom. Plot size was 4 rows by 20 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 through TX-6 Hollow Cone nozzles (2 per row). Estimates of spider mite density were determined by counting spider mites in a one inch square grid on the bottom side of 5 randomly selected leaves per plot 3 nodes down from the terminal using a 10X hand lens at on 10 (3 DAT), 14 (7 DAT), 21 (14 DAT) Jul. Data were analyzed with ANOVA and means were separated using a Fisher’s Protected LSD (P = 0.1).