The striped blister beetle is found all over the United States with different species found in the southeastern coastal plain. Adults produce one to two generations per year. Eggs are oval and white and deposited in the soil at the base of the host plant. Females cover their eggs after they are laid in the soil.
Larvae have long legs that reduce in size as they develop. They have small heads and do not feed immediately after hatching. Eventually they turn a reddish brown color with brown bands on their abdomen.
During the first instar, they feed on grasshopper and bee eggs. The larvae go through five instars before pupating in the soil and emerging as adults.
The Adult striped blister beetle is black and yellow with two black spots on its head, two black stripes on its thorax and two to three black stripes on its body. Its hind wings are transparent. Adults are active in the morning and late afternoon and seek shelter from the sun at mid-day.
Host plants that can become damaged by the striped blister beetle are been, beet, carrot, cabbage, Chinese cabbage, corn, eggplant, melon, mustard, pea, pepper, potato, radish, spinach, squash, sweet potato, tomato and turnip.
Adults also feed on clover, soybean and pigweed.
Blister beetles get their name from their ability to produce blisters when human skin comes into contact with a crushed beetle. This usually occurs on the neck and arms because blister beetles are attracted to outdoor lights at night. Blister beetles also produce Cantharidin, a highly toxic that irritates the gastrointestinal and urinary tracts in livestock and can cause death in horses.
Predators of blister beetles are robber flies, meadowlarks, bluebirds and the scissor-tailed flycatcher.
Fun factette: the blistering agent is cantharidin, also known as Spanish Fly. Its use as an aphrodisiac has been mercifully outlawed, since its mode of action was a fierce itch. Imagine poison ivy in your goodies. cn