Chemical Control of the Cotton Fleahopper, Plant Bug and Their Effect on Beneficial Insects, 1979

Pioneer brand4789A was planted on May 14 at the South Central Research Station, Chlckasha, Oklahoma at 18 lb/acre. Eight row plots, 200 ft long, replicated 3 times in a randomized complete block design were used. Spray applications were made with a John Deere Hi-Cycle 600 sprayer traveling at a speed of 4.5 mph, 1st gear, at 40 psi. Insecticide applications consisted of 2.5 gal of total spray mixture per acre, with one number 8 (Spraying Systems) nozzle per row. One application was made on July 17. During application .05 inch of rain fell followed by .1 and .18 inch on July 18 and 19 respectively. Insect populations were determined by running a D-VAC over 200 ft of each row in the center of each plot. Plots were sampled on July 16 prior to treatment and July 20, three days after treatment.