Some blister beetles in the state that are found in alfalfa are shown in figure 8. Management. There are more than 300 blister beetle species in the continental United States. Blister beetles have long (3/4 to 1-1/4 inch) narrow bodies, broad heads, and antennae that are about 1/3 the length of their entire bodies. Black blister beetle, E. pennsylvanica, and spotted blister beetle, E. maculataare more widespread.
New Mexico has at least 28 species in 8 genera.
Some blister beetle species are gregarious, congregating in large numbers, especially near field margins. Feeding on hay causes little, if any, crop injury. The chemical substance from the blister beetle can bring certain reaction to your skin. The three-striped blister beetle, E. occidentalis, tends to be a localized problem in the southeastern Arkansas valley. Blister beetles have been a problem in alfalfa in the northern United States, the Midwest, and the south for many years, but are an occasional problem in California. Epicauta spp.. Pest description and crop damage Large, gray to black elongate beetles feed on foliage in late spring and summer. Blister beetles (Figure 1) are a concern to alfalfa producers throughout Colorado. "Cantharidin concentrations average from about 0.4-5.2 milligram per beetle in some of the blister beetles commonly found in west Texas alfalfa.
Accidentally crushing a beetle against the skin can result in a painful blister, the source of the insect’s common name. So a healthy, 1,200-pound horse would have to eat about 115 of the most toxic beetles for death to occur.” Blister beetles are most likely to come into contact with homeowners as they are gardening, trimming shrubs or planting flowers, so wear protective gloves and long sleeve shirts to help prevent blister beetle exposure. Livestock poi- Blister beetle dermatitis causes a localized blister or welt. Blister Beetle Bite – Blister beetle is a kind of insect that belongs to the Meloidae family.This insect is known for its Cantharidin secretion, which is normally a chemical produced by male bugs. There are no known predators or parasites that effectively control blister beetles.
Blister beetles are attracted to blooming alfalfa. The welt may look like a raised, red patch of skin, whereas the blister produces a pocket of fluid and pus.
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