Apple, Early Season European Red Mite Control, 1993

Miticides were applied to mature trees in Fennville, MI (Black - Block) at a rate of 100 gpa with a FMC 1029 airblast sprayer. Treatments were arranged in a completely randomized design of single trees replicated 4 times. Applications of all materials were made as indicated in the table on 30 Apr (1/2 Green), 4 May (Tight Cluster), 7 May (Tight Cluster), 10 May (Pink), 18 May (Bloom), 1 Jun (Petal Fall), and 10 Jun (1C). Rubigan, Bayleton, Nova, Captan and Streptomycin were applied separately to all treatments. Evaluations were made on 25 May, 1, 7, 15 and 23 Jun by picking 50 randomly selected leaves per tree (total of 200 leaves per treatment). Mite counts were made by brushing leaves in a mite-brushing machine and counting eggs and motile forms of ERM, and adult predatory mites (AF and ZM), under a microscope.