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An Organic Apple Production System for New York 2003

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Project Leader(s):

Terence Robinson, Dept. of Hort. Sci., NYSAES, Cornell University, Geneva, NY 14456

Art Agnello, Dept. of Entomology, NYSAES, Cornell University, Geneva, NY 14456

Harvey Reissig, Dept. of Entomology, NYSAES, Cornell University, Geneva, NY 14456

Jim Schupp, Dept. of Hort. Sci., NYSAES, Cornell University, Highland, NY 14456

Heidi Noordijk, Graduate Student, Dept. of Hort. Sci. Highland NY 12528

Cooperator(s):

Deborah I. Breth, Cornell Coop. Ext., Lake Ontario Fruit Team, Albion, NY 14411

Stephen A. Hoying, Cornell Coop. Ext.-Lake Ontario Fruit Team, Newark, NY 14568

James Bittner, Fruit Grower, Singer Farms Olcott, NY (Grower Cooperators)

Steve Clark, Fruit Grower, Milton, NY (Grower Cooperators)

Charles Mead, Fruit Grower, Red Hook, NY (Grower Cooperator)

Type of grant: Pheremones, biorationals; microbials; organic pesticides

Project location(s): Throughout the Northeast

Abstract:

Several NY apple growers have indicated they see a marketing opportunity for NY grown organic apples (both fresh and processed products) and have requested a Cornell University led effort to develop a system of organic apple production for NY. In 2003 we studied apple maggot management, and fruit thinning control tactics that are organically approved. We have evaluated an organic approved insecticides Entrust and Dipel for apple maggot control in the late season. Entrust gave good control of the internal worm complex including apple maggot. Entrust was slightly better than to Dipel. The late season control obtained with Entrust needs to be combined with early season pest control with kaolin clays (Surround) which we reported on last year. With organic approved thinning agents we had excellent success. The Fish Oil/Lime Sulfur combination gave excellent thinning efficacy and a wide window of application (full bloom to post petal fall). NC-99 also gave significant thinning but gave more phytotoxicity. Both products also resulted in a small improvement in fruit size.

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