Bagworms - Knowledgebase Question

Claremore, OK
Question by EKUHNEL
January 18, 1998
What can I spray on Eastern and Western White Pine trees that will kill bag worms and anything else that might decide that my trees make a great meal? Can I spray something now in advance of spring weather?


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Answer from NGA
January 18, 1998

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Bacillus thuringiensis (Bt), sold under the trade name Dipel and Thuricide, is a great weapon against bagworms. It is basically a disease you give them (and other critters like gypsy moths, tent caterpillars, webworms, tomato hornworms, and other moth larvae). It is a great organic remedy that will not harm the birds, bees, animals and other insects in the garden. Since the pests must consume it for it to be effective, wait until you see them. It's most effective when the larvae are small. BT is verypopular and is widely available in mail order catalogs and most garden centers.

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