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The pupal stage is white and has the basic shape of the adult. Adult rootworms are about .25 inches (6.4 mm) long. Western corn rootworms are yellowish with a black stripe on each wing cover. Northern corn rootworm beetles are solid in color and vary from light tan to pale green. [2]
Diabrotica is a large, widespread genus of beetles in the family Chrysomelidae. Members of this genus include several destructive agricultural pest species , sometimes referred to as cucumber beetles or corn rootworms .
Spotted cucumber beetle A spotted cucumber beetle eating a leaf. Diabrotica undecimpunctata on goldenrod. Diabrotica undecimpunctata, the spotted cucumber beetle or southern corn rootworm, is a species of cucumber beetle that is native to North America. The species can be a major agricultural pest insect in North America.
Cucumber beetle is a common name given to members of two genera of beetles, Diabrotica and Acalymma, both in the family Chrysomelidae. [1] The adults can be found on cucurbits such as cucumbers and a variety of other plants. Many are notorious pests of agricultural crops. The larvae of several cucumber beetles are known as corn rootworms.
Diabrotica virgifera is a species of beetle in the family Chrysomelidae. It is an agricultural pest species that attacks maize. [1] It includes two subspecies, Diabrotica virgifera virgifera (the western corn rootworm) and Diabrotica virgifera zeae (the Mexican corn rootworm). [2] Diabrotica virgifera virgifera.
Thus, Adult striped cucumber beetles can be differentiated from western corn rootworms by being, on average, around 1 mm shorter than western corn rootworms and having black stripes that extend all the way to the end of their elytra. The striped cucumber beetle pupa is around 10 mm in length. Their abdomen is white.
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Diabrotica barberi, the northern corn rootworm, is a species of skeletonizing leaf beetle in the family Chrysomelidae. It is found in North America . [ 1 ] [ 2 ] [ 3 ] Adults feed on corn, and, when corn is unavailable, goldenrod pollen.