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What are Blister Beetles?

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Did you know a blister beetle emits a toxic chemical that causes blisters or welts on the skin? This chemical is called cantharidin and is found in the bug’s body fluids. Cantharidin is the main ingredient in Spanish Fly – dried, crushed blister beetle powder. Blister beetles feed on alfalfa and clover. Blister beetles are deadly to horses and livestock if ingested. The blister beetles are common in the southern and eastern areas of the United States. Blister beetles can destroy crops such as alfalfa, beets, tomatoes, and potatoes. If you have a small garden, use gloves to remove the blister beetle or sprinkle Scraminator in the garden bed.

Blister Beetle


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