If you hate wasps, and brush them off as just "uninvited guests at my picnic," take another look. For one, they're pollinators. Two, they're great predators, contributing to the biocontrol of such lepidopteran pests as cabbageworms (larva of cabbage white butterflies). Three, they're quite intelligent. Four, they're superb architects. And they are much more. (Professor Amy Toth of Iowa State University told a UC Davis Entomoloogy and Nematology seminar: "They have been shown to carry yeasts...
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