Insect Control on Bell Peppers, 1981

Spray materials were applied using a 2 gal, CO2 pressurized, stainless steel sprayer at 38 psi in 1 gal water (= 40 gal/acre), to both sides of the rows. Treatments were replicated 4 times, in 1-row, 40 ft long plots in a complete randomized block design. Each plot consisted of 20 plants, 2 ft apart within the row, with a 6 ft space between plots and replicates. Plants were set out the last week of May on the University Farm, Newark, DE. Insecticides were applied on a weekly schedule starting Jul 9 and ending Sep 4. One ECB (European c6rn borer) egg mass, in the black-head stage, was attached to every other plant (odd-numbered) on Jul 7 and Aug 11 and on every other plant (even-numbered) on Jul 15 and Aug 18. For GPA (Green peach aphid) population counts, leaves were sampled, 20/plot, on Jul 29, Aug 5, 19 and Sep 2. Peppers, (all the commercial size (greater than 2.5 inches), mixed red and green fruit) were harvested on Sep 10. ECB infestations and the total number and weight of fruit per plot were recorded. Data were subjected to analysis of variance.