Evaluation of fungicides to control multiple diseases in annual strawberry, 2007-08.

摘要

On 17 Oct 07, bare-root runner plants from Canada were transplanted into methyl bromide:chloropicrin (98:2) fumigated soil in plastic-mulched, raised beds. Transplants were irrigated by overhead sprinklers for 10 days to aid establishment, then irrigated and fertilized through drip tape. The beds were 28-in. wide on 4-ft centers. Each bed contained two staggered rows of plants spaced 15-in. apart within rows and 12-in. between rows. Treatments were arranged in a randomized complete block design withfour blocks, each in a separate bed. In early Dec, plants were removed from the beds leaving 14-plant plots arranged in a staggered pattern, with an unplanted bed between blocks, andan unplanted gap equal to one plot (8.1 ft) between beds within a block. Fungicide applications were made weekly from 5 Dec to 12 Mar (15 applications) using a CO2 backpack sprayer calibrated to deliver 100 gal/A at 40 psi through a boomwith two TeeJet hollow-cone nozzles spaced 12 in. apart. Experimental products were applied alone, in tank mixes, or in blocking programs with other products. Fruit were harvested twice weekly from 18 Dec through 21 Mar (26 harvests).Marketable fruit were counted and weighed to determine yield. Diseased fruit were counted for each pathogen. Small fruit weighing less than 10 g, diseased fruit, and other unmarketable fruit were also enumerated. Disease incidences foranthracnose fruit rot and Botrytis fruit rot was expressed as a percentage of the total number of marketable and unmarketable fruit. Yield data and arcsine transformed incidence data were analyzed by two-way ANOVA. Nontransformed data are presented.