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- To whom reprint requests should be directed at the Biologically Active Natural Products Laboratory, Agricultural Environmental Quality Institute. BARC‐East, Beltsvllle, MD 20705. Mention of a commerical or proprietary product in this paper does not constitute an endorsement of that product by the USDA.
- Livestock Insects Laboratory, Agricultural Environmental Qualitity Institute, BARC‐East, Beltsville, MD 20705.