Abstract
Plots consisted of 10 mature ‘catawba’ vines, with 5 replications in a RCB design. Treatments were applied as foliar sprays at a rate of 100 gpa (935 liter/ha) with a FMC DP15 airblast sprayer on 28 Jun and 31 Jul when pheromone trap catch indicated adult male GBM flight activity was at a peak. The percentage by wt of GBM damaged berries was determined from a harvest sample of 20 clusters taken at random from each plot on 18 Sep.

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