Evaluation of Insecticides For Control of Insect Pests of Tomatoes, 1976

Two tests were conducted at Homestead for control of several insects on tomatoes. The plots were direct seeded Sep 15, 1975 in Rockdale soil and later thinned, leaving a density of 1 plant per ft . Plots consisted of single rows on 6 ft centers 15 ft long. There were 4 replications per treatment in a randomized complete block design. Insecticides were applied weekly from Nov 13 to Jan 15 with a tractor mounted sprayer with 5 nozzles per row. Treatments were applied at a pressure of 250 psi in 100 gal of water per acre. On Dec 16 the number of leafminer mines and green peach aphids per terminal trifoliate of 10 randomly selected leaves per plot were counted. Tomatoes were harvested Jan 12 and 21 . The percent Southern armyworm damaged fruit was determined by examining 25 randomly selected fruit from each plot on each harvest date. Tomatoes for Test 2 were seeded Jan 12, 1976 in Rockdale soil. Plant density, plot size, statistical design, number of replications, application schedule, equipment used, psi, and gal per acre were the same as used in Test 1. On April 19 the number of living pinworm larvae and vegetable leafminer larvae per terminal trifoliate of 10 randomly selected leaves per plot were counted. The percent tomatoes damaged by pinworm feeding was determined April 16 by randomly selecting 10 mature green fruit per plot. Duncan's multiple range test was used to separate treatment means.