Peach, Effect of Pydrin Treatments on European Red Mite Control with acaricides, 1986

This test was conducted in an 11-year old peach orchard on the variety ‘Red Haven'. Single tree plots, replicated 3 times and arranged in a split-plot design were sprayed to runoff (ca 3 gal/tree) with a hydraulic sprayer equipped with a handgun and operated at 300 psi. For disease control the orchard was sprayed with sulfur as needed. ERM counts were made by randomly picking 25 larvaes/tree, brushing the mites onto glass plates coated with Triton B-1956 and counting the number of motile mites. Mite-days were calculated as follows: MD = MD1 + [(Ml + M2)/2 x Y], where MD1 = mite-days already accumulated, Ml = avg ERM/ leaf on a given counting date, M2 = avg ERM/leaf on the next counting day after Ml and Y = no. of days between Ml and M2.