Blister Beetles

Blister beetles are soft-bodied beetles that range in size from 1 to 2.5 cm in length. There are several species of blister beetle in the U.S. Adults range in color from an ash gray to bright yellow with black stripes. They usually are seen during the day on flowers and also are attracted to lights at night.

Blister beetles are not an indoor infesting pest. They tend to be more of an agricultural/livestock pest. Many species feed on plants which include ornamental and vegetable crops. Horses and livestock also may be affected. Blister beetles, feeding in a hay field, may accidentally be ground up when the hay is harvested.

Immature stages of blister beetles often go unnoticed. Adults, however, can be observed on vegetation. Control of blister beetles typically does not involve an exterminator. As a mainly agricultural pest, most control is done when the crop is being grown or harvested. Growers should check crops for the presence of blister beetles, especially prior to harvesting. If blister beetles are present, a pesticide application can be used to control the beetles.
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