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Does anyone know anything that will either prevent stem borers (squash) or do anything to curb them after the first one is discovered? My county agent has no suggestions. I have seen the first one on one acorn squash and tomorrow I am going to mix a little of the nastiest stomach poison insecticide I know of (Imidan) and very laboriously spray the bottom 6 inches of every stem. (at least 60 plants) , but I am not optimistic. Suggestions?