Foliar and Hopperbox Treatments with Orthene for the Control of Cotton Fleahoppers and Aphids, 1983

A field study was conducted on the Texas A&M Agricultural Research and Extension Center at Corpus Christi, TX, to determine the efficacy of Orthene 75S applied at different rates and formulations compared to Bidrin and an untreated check. The plot design was randomized complete block with 4 replications of 9 treatments. Plots were 8 rows wide by 40 ft and were planted on 28 Mar in beds spaced 38 inches apart. The soil type was Victoria sandy clay loam. The planting rate was 20 lb seed/acre. The plots of slurry treated seed received 0.075 lb (AI)/acre of Orthene 75S (based on 8 oz/100 lb seed). Foliar insecticides were applied with a backpack sprayer calibrated to deliver four gal of solution/acre in a band 20 inches wide on 16 May and 3 Jun. Aphids were sampled in the check and hopperbox treatments by examining 40 inches of row per plot, 36 Jays after planting. Fleahopper numbers and damage were determined weekly by visual examinations of 50 terminals per plot from 13 May to 6 jun.