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A mature Concord’ vineyard of 15 acres size with a known history of GBM infestation, located in Fredonia, NY, was used for the evaluations. The vineyard rows were 9 ft apart and the vines set at 8 ft apart within the row. Seven different non-conventional insecticides were tested along with 3 conventional insecticides. Each treatment consisted of 45 vines (3 rows X 15 vines) and was replicated 3 times in a randomized complete block design. Treatments were applied as dilute (100 gal/acre) foliar sprays with a hooded boom over-the-row sprayer operated at 400 psi. Two to 6 sprays were made (per treatment) between 15 Jun (Bloom) and 16 Aug 1990. Injury assessments were made on 5-6 Sep 1990, on the number of berries injured by GBM larvae per 100 clusters in each replication (10 clusters from 10 vines per replication). Sevin 50 WP (two sprays) applied at 4 lb product and Penncap-m (two sprays) applied at 4 pt product were the standards. Cover sprays, consisting of a tank mix of triademefon (Bayleton) at 1 oz AI/A and maneb (Dithane M-22) at 1.5 lb AI/A, were applied to all plots on 15 Jun and 7 Jul to suppress powdery mildew, black rot, and downy mildew. Injury assessment was made on 5-6 Sep based on the number of berries injured by GBM larvae per 100 clusters in each replication (10 clusters from 10 vines per replication).

Trials of Non-Conventional Insecticides for Grape Berry Moth Control, 1990