When dealing with nematodes, Washington State vineyardists need two things they currently lack: more effective control strategies and meaningful economic thresholds to guide them in knowing when treatment is necessary. Answers for both issues should be forthcoming from work being conducted by Washington State University nematologist Dr. ­Ekaterini Riga. Since losing the use of Nemacur (fenamiphos) almost two years ago when Bayer Corporation voluntarily pulled its U.S. registration due to association with bird kills, grape growers have not had an effective nematicide for vineyards already established. Soil fumigation is an effective pre-plant strategy, but that is little consolation if your […]