USING ISOMATE-P AND ISOMATE-LPTB PHEROMONES TO REDUCE GRAPE ROOT BORER MATING IN VINEYARD, 2004

The trial was conducted at the Missouri State Fruit Experiment Station in Mountain Grove, MO. The trial was replicated in three different vineyards ranging in size from 1.9 to 3.1 acres. Grape varieties included one vineyard with ‘Catawba’ vines, one with ‘Vidal’, ‘Seyval’, ‘Cayuga’, and ‘Vignoles’, and one block with ten different French-American hybrids. The untreated check vineyards were 0.5 to 3.0 acres. They consisted of numerous cultivars including Vitis labrusca, (e.g., ‘Catawba’, ‘Delaware’, ‘Niagara’), Vitis aestivalis (‘Norton’), and numerous French-American hybrids (Vitis vinifera x V. labrusca). Treatments included Isomate-P (25 or 50 dispensers/acre) and Isomate-LPTB (25 or 50 dispensers/acre). Isomate-P pheromone dispensers were put in the vineyards on 8 Jul. Two Pherocon VI large plastic delta traps with a Trece PB-GRB lure were placed in the middle row of each set of treatment rows. Treatment blocks consisted of seven to eight rows of vines, twenty-eight to fifty-three vines per row. Two traps were also placed in each untreated check vineyard. Traps were monitored two to three times/wk. GRB flight began 19 Jul. Means of the number of moths/trap/observation were separated using a Fisher’s Protected LSD Test (P ≤ 0.05).