Apple, Season-Long Insecticide Block Treatments, 1993

Insecticides were applied to mature trees at a rate of 100 gpa with an FMC 1029 airblast sprayer. Treatments were arranged as completely randomized units consisting of three rows by three trees (9 trees/unit), each replicated 3 times. Applications were made on 10 May (Pink), 26 May (Petal Fall), 8 Jun (1C), 22 Jun (2C), 6 Jul (3C), 19 Jul (4C), 31 Jul (5C), 11 Aug (6C), 23 Aug (7C), 5 Sep (8C), and 16 Sep (9C). Rubigan, Bayleton, Captan, Streptomycin and Nova were applied separately to all treatments. Data were taken on 9 Jul by picking 50 fruit taken randomly from the periphery of the center tree from each replicate (150 fruit per treatment). Harvest fruit finish data were taken on 21 Sep from 100 fruit taken randomly from the periphery of the center tree from each replicate (300 fruit per treatment).