Project Number: 5358-12220-003-04
Project Type: Specific Cooperative Agreement

Start Date: Sep 27, 2007
End Date: Sep 30, 2009

Objective:
To evaluate dripline application of telone:chloropicrin, solarization, and iodomethane:chloropicrin as alternatives to MB:chloripicrin fumigation for reduction of pathogens and weeds in raspberry and forestry seedling nursery production.

Approach:
Five replicate plots of each treatment will be arranged in Randomized Complete Blocks. Plots will be 10 feet wide and 100 feet long, with 20 ft wide alleyways between the blocks to allow machinery access. Data will be taken only from the middle 40 feet of each plot to minimize edge effects. Including border rows, the total experimental area will be approximately 1.3 A. Prior to solarization or fumigation, soil will be deeply cultivated and rototilled to 6¿ depth. Nylon mesh bags containing inoculum of Phytophthora fragariae var. rubi and of Agrobacterium tumefasciencs will be placed in plots prior to treatment, and will be evaluated following treatment. Raspberry planting stock will be established in the plots, which will be cultivated according to industry standards for raspberry nursery. Growth, incidence and severity of soilborne disease will be evaluated throughout the growing season. At the end of the season, plots will be harvested and the quantity and quality of planting stock produced will be evaluated. Documents SCA with Washington State University.