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Pest Management Strategic Plan for Washington

Pest Management Strategic Plan for Washington State Wine Grape Production Summary of a Workshop Held March 17, 2004 Pasco, WA Issued May 27, 2004 Table of Contents Executive Summary Priority List of Critical Needs Work Group Members Production Facts and Background Foundation for the Pest Management Strategic Plan Pre-plant/ Planting (August to May) Bud Swell through Bloom (Mid-March to June) Bloom to Veraison Oune to August) Veraison to Harvest (August to October) Post-Harvest/ Dormant Stage (October to Mid-March) Appendices Efficacy Ratings Table 1 : Disease Management Tools Table 2: Insect and Mite Management Tools Table 3A: Annual and

Biennial Weed Management Tools Table 3B: Perennial Weed Management Tools Table 4: Nematode Management Tools Table 5: Vertebrate Management Tools Table 6: Toxicity Ratings of Pest Management Methods in Beneficials Table 7: Worker Activities in Washington Wine Grapes Table References 40 42 44 46 48 49 50 53 54 2 3 461011 19283337 Summary Executive Summary The Environmental Protection Agency (EPA) is engaged in the process of re- registering pesticides under the requirements of the Food Quality Protection Act (FQPA), examining dietary, ecological, residential, and occupational risks posed by certain pesticides.

Their regulatory focus continues to include dietary exposure to the organophosphate (OP), carbamate, and suspected 82 carcinogen pesticides but has broadened to emphasize environmental (non-target species) impacts and human health risks through worker exposure. EPA may propose to modify or cancel some or all uses for certain chemicals on wine grapes. Additionally, the extra regulatory studies that EPA requires registrants to complete in the course of re-registration may result in some companies voluntarily canceling certain registrations rather than incurring the additional costs of the required studies.

Continued consumer focus on risks of pesticides may also lead some wine grape processors to require growers not use certain chemistries. To assist the EPA and facilitate communication from industry to regulatory authorities, the United States Department of Agriculture (USDA) has requested that all commodity groups develop Pest Management Strategic Plans (PMSPs) to identify the critical research, regulatory, and educational needs within each specific commodity.

A crosssection of wine grape growers, researchers, university Extension personnel, wine grape processors/winemakers, and crop dentify critical research, regulatory, and educational needs. The Washington State wine grape industry faces a number of challenges ranging from the losses of dimethoate (an essential control for several insect pests including thrips, for which no alternate control is available) and fenamiphos (Nemacur, an essential control for nematodes) to a need for quarantines (to protect the state from importation of disease, weed, and insect pests) to concerns about herbicide drift from other crops.

This document identifies research, regulatory, and educational needs critical to sustaining the industry now and in the future. Summary of Critical Needs Priority List of Critical Needs in Washington Wine Grape Pest Management The following priority areas must be addressed in order to maintain the long-term viability of the wine grape industry in Washington. Economic sustainability must be considered with respect to any pest management measure if it is to be viable. Determine virus-vector relationships. Refine disease modeling, RESEARCH including powdery mildew and botrytis bunch rot.

Study cover crop management and IPM impacts on all pests. Develop economic thresholds for insects, mites, and nematodes. Develop control/management strategies for thrips. Research use of green manures/cover crops for management of nematodes and soilborne insects. Conduct phylloxera rootstock trials and industry surveys on pest prevalence. REGULATORY Address quarantine issues, including: o Phylloxera quarantine, need new surveys (WSDA); o Virus quarantines, need new surveys (WSDA); o Vine mealybug inclusion in current quarantine description.

Register flumioxazin (Chateau), zeta- cypermethrin (Mustang Max), lambdacyhalothrin (Warrior), cyprodinil + fludioxynil (Switch). Add wound-protectant use against Eutypa dieback to the thiophanate methyl (Topsin) label. Expedite “List of 54” review (EPA). Increase enforcement efforts at home & garden centers for grapes/ornamentals (WSDA). Develop scouting field guide for all pests, including

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