Apple, Insect Control, Hudson Valley, 1976

Insecticide treatments were evaluated in a seasonal control program in a twelveyearold planting on the EM 2 rootstock. Treatments were applied to runoff by high pressure handgun sprayer operating at 425 psi and using ca 3.2 gal/tree or 300 gal/acre. Eight-tree plots containing from 5 to 7 different apple cultivars were replicated 3 times in a randomized complete block design. Treatments were applied at pink (Mcintosh) April 19; petal fall (Rome) May 7, 8; and in 7 cover sprays- May 21, 24; June 4, 18; July 2, 26, 30; and August 13. Additional sprays applied over the entire block by airblast sprayer for disease control included: Difolatan 4F, 5 qt/100 gal (April 6), Captan 50W 1 1/2 lb/100 gal (May 3), and Manzate 200 80W 1 1/2 lb/100 gal (May 13). The Golden Delicious, Rome Beauty, and Red Delicious cultivars were thinned May 22 with 10 ppm NAA. Above normal temperatures during early April caused an abnormally early bloom. This resulted in harvest dates which were 1-2 weeks earlier than normal. Temperatures were slightly below average for July, August, and September, but rainfall was 3" and 1" above normal for months of August and September.