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Northwest beekeepers trying out new miticide

...years, Johansen said. The exemption expires next February. The active ingredient in the Bayer Bee Strip is a chemical called coumaphos. Bees walk on the strips, which hang inside the hives, and distribute the chemical. When varroa mites come...

http://chronicle.augusta.com/stories/1999/03/09/tec_255676.shtml
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