Evaluation of fungicides for control of post-harvest fruit rot diseases in matted-row strawberries, 2013.

摘要

The experiment was conducted in a 5-year-old commercial, matted-row strawberry planting in Camden, MI. Rows were spaced 42 in. apart. Treatments were applied to 10-ft sections of row and were replicated five times in a randomized complete block design. Sprays were applied with an R & D Research CO2 cart-styled sprayer equipped with six bottles (0.8 gal each), a twin-gauge Norgren pressure regulator set at 55 psi, and a single XR TeeJet 8002VS nozzle on a 5-ft spray boom. Spray volume was 100 gpa. Spray dates and corresponding phenological stages were as follows: 24 May (green up and very early bloom), 3 Jun (bloom with start of green fruit development), 12 Jun (green and red fruit), 19 Jun (green and red fruit), 26 Jun (red fruit). On 13 and 27 Jun,all ripe berries were hand-harvested from the center 3 ft in each plot. Disposable gloves were used to pick berries and changed between plots to reduce cross-contamination. To evaluate post-harvest diseases, 50 marketable berries from each plot were placed equidistantly on metal screens in aluminum trays and incubated at 72°F and 100% RH. After 6 days, berries were visually assessed for fungal sporulation. All plots were monitored for phytotoxicity throughout the study.