Apple, Insect Control, Hudson Valley, Highland, New York, 1978

Insecticide treatments were evaluated in a seasonal control program conducted in a 14-yr-old planting on the EM 2 rootstock. Eight-tree plots containing from 5 to 7 different apple cultivars were replicated 3 times in a randomized complete block design. Treatments were applied dilute to runoff using 4.2 (May and June) to 5.2 (July and August) gal spray/tree (403-499 gal/acre) with high pressure hand gun sprayer at 400 psi. Treatments were applied at petal fall (May 26) and 5 cover sprays (Jun 10, 23, Jul 7, 24, and Aug 9) except HOE 25682, which was omitted from the Aug 9 spray. Additional sprays applied over the entire block by air-blast application (3X, 133 gal/acre) include: Difolatan 4F 5 gal/acre (Apr 24) and Cyprex 65W 2 lb/acre (Jun 6). Cool temperatures during April and May resulted in later than normal bloom and consequent late harvest. Rainfall was above normal in May with most of the rain received during bloom period. Very little rainfall was recorded the 3 wk following bloom, providing ideal conditions for evaluation of fruit finish related to insecticide treatments. Insect pressure was below normal for most species evaluated.