Good Fruit Grower

March 1

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Management One last GUTHION SPRAY F ruit growers in Michigan can use existing stocks of the insecticide azinphos-methyl (Guthion) one more time before it is phased out at the end of September this year. When should they use it? Michigan State University tree fruit entomologist Dr. Larry Gut suggests they target flies���the apple maggot in the case of apple growers, the cherry fruit fly if they grow tart cherries. For several years, Gut has been working with growers helping them shift to newer ���reduced risk��� insecticides as the U.S. Environmental Protection Agency put Guthion on a phaseout program that gradually reduced the number of applications they could make and the amount of active material they could use in a season. The phaseout was supposed to end with the 2012 season, but in Michigan, both the apple and cherry crops were decimated by spring freezes. The EPA was persuaded to allow one more season of use���so growers could use by Richard Lehnert up stocks they had on hand. So growers can use up to three-fourths of a pound of active material��� about one spray���this year. In the announcement last August 29, the EPA made it clear it has not changed its views about the 2008 cancellation order that was to Growers should target it toward cherry fruit fly and apple maggot. photos CoURtEsY oF MIChIGAN stAtE UNIVERsItY Pest Cherry fruit flies and apple maggots are hard to control with newer insecticides that must be ingested because they don���t feed much before laying their eggs. phase out azinphos-methyl over six years because of ���high worker and ecological risks.��� ���As a result of this year���s abnormal weather events, however, growers have been left with unused stocks that cannot be used unless EPA modifies the existing Larry Gut Prevent Replant Disease and Nematode Infestation Schedul your e applicat ion TODAY! the ving Ser west orth ���c N Paci with Telone* C-17 soil fungicide and nematicide (includes chloropicrin) CUSTOM ORCHARD FUMIGATION Chris Ford/Dale England/Len England 509 687-9572 Chris, cell/text: 509 366-5180 Dale, cell/text: 509-860-9058 Len, cell: 509-679-7124 E-mail: Visit us at 28 MARCH 1, 2013 GOOD FRUIT GROWER ! "

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