Foliar Sprays to Control Colorado Potato Beetle on Tomato, 1985

Trials were conducted in Landisville, Lancaster County, PA. ‘Roma’ tomatoes were transplanted on 15 May in rows 60 inches apart with 18-inch spacing between plants. Plots consisted of one 20-ft treatment row alternated with buffer rows planted to ‘Pick Red’ tomatoes spaced 36 inches apart. A randomized complete block design with 4 replicates was used. Insecticides were applied on 18 Jun, 16 Jul, 6 Aug with a CO2 pressurized back-pack sprayer delivering 20 gal/acre at 20 psi. Five stems per plot were sampled throughout the growing season for all stages of CPB. Plant damage rated on a I to 5 scale based on leaf loss were 1 = 0-5% loss, 2-6-25% loss, 3 = 26-50% loss, 4 = 51-75% loss, and 5 = >75% loss.