On April 21, 2017 the Environmental Protection Agency approved a petition to renew a Section 18 Emergency Exemption for use of the bifenthrin-based products, Brigade WSB, Bifenture EC, and Bifenture 10DF against brown marmorated stink bug in apples, peaches, and nectarines in Virginia. This exemption applies only to the products mentioned above. These and other bifenthrin-based insecticides have a full Section 3 label for use in pears in Virginia. The requirements of this Section 18 are that applications must be made only during the post-bloom period and by ground only, at a rate of 0.08 to 0.2 lb active ingredient (a.i.) per acre, with not more than 0.5 lb a.i. per acre per season. These application rates equate to 5.12 – 12.8 fl oz of Bifenture EC, 12.8 – 32.0 oz of Bifenture 10DF, and 12.8 – 32.0 oz of Brigade WSB per acre, and seasonal maximums of 32 fl oz of Bifenture EC, 80 oz of Bifenture 10DF, or 72 oz of Brigade WSB. Multiple applications may be made per season, at a minimum re-treatment interval of 30 days. The REI is 12 hours and the PHI is 14 days. This insecticide is extremely toxic to fish, aquatic invertebrates and bees, and all precautions to avoid these exposures must be observed. Specifically, to help minimize exposure to pollinators, the following statement about the application timing must be observed, “Do not apply this product until after petal fall”. Since bifenthrin is considered one of the strongest insecticides against brown marmorated stink bug but can be disruptive to natural enemies of secondary pests, we recommend its use later in the season for apples, when stink bug populations are highest. In peaches and nectarines, its benefits might be best as fruit approach maturity, but outside of the 14-day PHI. This Emergency Exemption expires on October 15, 2017.
Until next time, best wishes.