Carlos Garcia-Salazar, garcias4@msu.edu, Michigan State University, Ottawa County Extension, 333 Clinton Street, Grand Haven, MI, John C. Wise, wisejohn@msu.edu, Michigan State University, Department of Entomology, Trevor Nichols Research Complex, Fennville, MI, and Rufus Isaacs, isaacsr@msu.edu, Michigan State University, Entomology, Department of Entomology, East Lansing, MI.
Blueberry production is a high-risk endeavor further amplified by the implementation of the 1996 Food Quality Protection Act (FQPA). This law eliminated and/or restricted many conventional insecticides relied upon for fruit production. New reduced-risk pesticides require more site-specific biological information to be used effectively. As a result, producers must enhance their ability to scout for pests and expand their knowledge of how to incorporate these Integrated Pest Management practices into their existing production system. In 2003, based on results from a USDA RAMP project for blueberries, we selected the more promising reduced-risk insecticides to substitute for conventional Ops used for blueberry production in Michigan. Reduced risk treatments were placed in 5-8 acre plots side by side with the conventional OP-based growers’ program. MSU Extension provided the insecticides and growers applied the products according to their own scouting and timing without intervention of the Extension agent. Four growers volunteered to try the reduced-risk program. Two years of testing indicated that pest control in reduced-risk plots was similar to that of the OP-based conventional program. The reduced risk program also allowed for early control of fruitworms and increased the population of natural enemies in treatment plots.
Constraints to adoption of reduced-risk IPM were: reduced-risk products are more pest-specific and must be ingested to effectively control the pest. They require site-specific biological information, product knowledge and intensive scouting to be used successfully by growers. In addition, incorporating reduced-risk products into actual IPM programs requires far more Extension and education of end users.
Keywords: Reduced-risk insecticides, Blueberry IPM