Insect Control on Eggplant, 1983

‘Dusky’ eggplants were seeded in a Lyles sandy loam soil at the Southwestern Purdue Agrie. Cent, at Vincennes, Ind., on 20 June. Plots were 9 m long and 2 m wide arranged in a randomized complete block with three replicates and four treatments. Foliar sprays were applied with a “Hamby” tractor utilizing a one-row sprayer. Drop nozzles on either side and a nozzle over the row ensured complete coverage. Pressure was maintained at 70 lb/in2 to deliver 19 gal/acre. Applications were made at weekly intervals on 25 July, 4, 11, 18, 24, and 31 Aug., and 8 Sept. Damage from FB was recorded on 29 Aug. by applying a 2.5 cm2 template over five randomly selected leaves per plant using 10 plants per treatment, and counting the number of FB holes. CPB were counted at weekly intervals during the duration of the experiment. Yield samples were taken 29 Aug. and 9 Sept., picking all marketable fruit. Unmarketable consisted of undersize fruit less than 150 g.