![]() ![]() The California Association of Winegrape Growers (CAWG) has launched a website to help inform growers about the PD/GWSS referendum. Specimens can be brought to the Department of Agriculture or the Farm Advisor UC Cooperative Extension at 1682 Novato Boulevard, Novato, during regular office hours. Treatment is warranted for glassy-winged sharpshooters if they are present in the vineyard.Īnyone who thinks they have found a glassy-winged sharpshooter is asked to call the Marin County branch of the Department of Agriculture at 41 as soon as possible or contact the Marin County Farm Advisor UC Cooperative Extension at 41. Replace traps every two weeks or when they become excessively dirty or discolored and especially on edges adjoining alternate glassy-winged sharpshooter hosts such as citrus.Remove insects from the trap after counting and recording on a monitoring form.Monitor traps for glassy-winged sharpshooters throughout the season until daytime temperature remains below 65° F. Check traps once per week beginning at budbreak and more frequently after two to three days of warm weather.Place one trap per 10 acres within 30 feet of the vineyard perimeter, especially on edges adjacent to alternate hosts such as citrus. In the vineyard, place a minimum of six traps per block.In late February just before budbreak, place several double-sided yellow sticky traps (at least 9-by-11 inches) in areas adjacent to vineyards that serve as habitat for sharpshooters, such as riparian areas and ornamental landscapes.UC IPM guidelines say the best time to start monitoring for glassy-winged sharpshooters is at budbreak. The following spring, delayed and stunted shoot growth will occur, even if no symptoms appeared the previous year. Wood on new canes will mature irregularly. Fruit clusters then shrivel, and dried leaves fall. In mid- to late-summer, leaves become slightly yellow along the margins in white varieties, or red along the margins in red varieties. Nematicides Know-How: Ways To Help Rid Your Potato Crops of NematodesĪccording to University of California IPM, PD symptoms often first appear as water stress in midsummer.
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