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2012 - Washington Red Raspberry Commission

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We will also continue to monitor plant performance as described above. Analysis of Variance<br />

will be used to identify treatment differences within a location and year.<br />

Timeline:<br />

Activity 2013 2014<br />

Sample <strong>2012</strong> trials for nematodes April, Sept<br />

Sample 2013 trials for nematodes April, Sept April, Sept<br />

Apply 2013 Vydate applications April, May, June<br />

Evaluate <strong>2012</strong> trials for phytotoxicity July<br />

Evaluate 2013 trials for phytotoxicity July July<br />

Anticipated Benefits and Information Transfer:<br />

This research will provide raspberry growers with information to maximize the efficacy of nonbearing<br />

applications of Vydate for P. penetrans control. Our research will also provide<br />

information about potential phytotoxic side effects of Vydate to newly planted raspberry. Two<br />

applications of Vydate at 2 quarts/acre will cost a grower approximately $150/acre (chemical<br />

plus labor); our research will ensure that this is money well spent. Our research results will be<br />

presented to red raspberry growers at meetings (Berry Workshop, Lynden) and the annual WSU-<br />

NWREC field day. Results will also be communicated to the <strong>Washington</strong> <strong>Red</strong> <strong>Raspberry</strong><br />

<strong>Commission</strong> and to Peerbolt Crop Management for inclusion in their newsletters.<br />

References:<br />

Gigot, J., Walters, T.W., and Zasada, I.A. Impact and Occurrence of Phytophthora rubi and<br />

Pratylenchus penetrans in commercial red raspberry (Rubus idaeus) fields in northwestern<br />

<strong>Washington</strong>. International Journal of Fruit Science (submitted).<br />

Zasada, I.A., Walters, T.W., and Pinkerton, J.N. 2010. Post-plant nematicides for the control of<br />

root lesion nematode in red raspberry. HortTechnology 20:856-862.<br />

113

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