Issue link: http://read.dmtmag.com/i/155925
es. Pfeiffer said that SWD damage has been seen in fresh apples. In most places where it is found, it hasn't been a major threat to grapes. SWD's ovipositor can overcome more than just soft berries; it has also been found to compromise harder fruits, such as peaches and apples. The focus of the Oregon State program is to protect the state's $270 million berry and cherry industries, particularly late-ripening berry and soft stone-fruit crops. "We looked at wine grapes and it was not an economic issue," Walton said, noting that Botrytis seemed to cause more susceptibility in grapes. pesticide residue into the cluster Tim Martinson, viticulture extenfor enhanced protection. sion agent with Cornell University Investigators in the SWD Projin New York, expressed the typical ect evaluated a range of domestic reaction of the eastern agents surparasitic insects for possible bioveyed in Maryland, New Jersey and control, such as a parasitic wasp Pennsylvania, saying that while the native to the U.S., Pachycrepoides SWD is found throughout the state, vindemmiae, which lays its eggs in its damage has been focused on the fly's pupae and kills them. Walraspberries and small fruit. ton said the results were nothing to "I have not seen a lot of damage get excited about. However, some on grapes," he said. non-domestic wasps have shown But that may change, Pfeiffer greater promise for biocontrol with warned. Conditions in the East two species of wasp in trials. are more conducive to fruit flies, offering more wild hosts such as David Falchek is a regular conthe pokeweed and wild berries tributor to trade publications such common in Virginia. Temperatures as Vineyard & Winery Managedon't get hot enough to deplete the ment and Beverage Media. He also population, and high humidity and V&WM WV/WL Ad 8/01_V&WM WV/WL Ad 8/01 7/16/12 1:00 PM Page 1 writes a regular consumer wine frequent rainfall reduce the effeccolumn for The Scranton Times-Tritiveness of pesticides. The winters bune, in Scranton, Pa. don't seem to exterminate them, either, Pfeiffer said. Comments? Please e-mail us at "The need (for control) is huge in feedback@vwmmedia.com. berry crops, no question about it," he said. "As people get more familiar with the symptoms of SWD, reporting will increase on grapes." Some extremes have been evident in Pfeiffer's observations. Petit verdot and pinot noir, thin-skinned varieties, were highly susceptible to SWD. Chardonnay was not. But the research team is working to sort out and evaluate risk factors including varietal differences and Trellis & Fence Wire Anchor the effect of rainfall on malathion Embossed jaws grip the wire as it is (a preferred insecticide). It is also inserted and prevent it from being doing spray trials. pulled out. The wire is retensionable Other early results show that with a pair of pliers or a claw hammer. pesticide application just before berry closure can help get some WIREVISE® WIRELINK™ For easy splicing of 8-16 gauge wire. No tools required. Simply insert the wire into each end of the WireLink and you have a splice. A release tool is available from AgFast for 12-16 gauge wire. For your nearest dealer, contact: Toll-Free: 877.552-4828 909.451.2299 • Fax: 909.593-8309 56 V I N E YARD & WINERY MANAGEMENT | Sept - Oct 2013 w w w. v w m m e d i a . c o m