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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.
Spotted cucumber beetle, northern corn rootworm beetle, and western corn rootworm beetle Western corn rootworm. 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.
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. Spotted cucumber beetles cause damage to crops in the larval and adult stages of their life cycle.
Diabrotica barberi R. Smith & Lawrence, 1967 - northern corn rootworm; Diabrotica barclayi Derunkov, Rocha Prado, Tishechkin & Konstantinov, 2015; Diabrotica balteata LeConte, 1865 - banded cucumber beetle; Diabrotica bartleti Baly, 1890; Diabrotica beniensis Krysan & Smith, 1987; Diabrotica biannularis Harold, 1875; Diabrotica bilineata Baly, 1890
There are many similarities in the life cycles of the northern and western corn rootworm. Both overwinter in the egg stage in the soil. Eggs, which are deposited in the soil during the summer, are American football-shaped, white, and less than 0.004 inches (0.10 mm) long. Larvae hatch in late May or early June and begin to feed on corn roots.
It includes two subspecies, Diabrotica virgifera virgifera (the western corn rootworm) and Diabrotica virgifera zeae (the Mexican corn rootworm). [2]
However, Western corn rootworm adults are longer than striped cucumber beetle adults. Whereas the length of the adult striped cucumber beetle is around 5.25 mm, the length of the western corn rootworm is around 6.3 mm. [ 3 ] Furthermore, the black stripes of western corn rootworm adults do not fully span across the entire elytra, but begin to ...
The fully grown larva is 0.75 to 1 inch (1.9–2.5 cm) in length. Larvae vary in color from light brown to pinkish gray and have conspicuous small, round, brown spots on each segment along the body. As they grow they reach between 2 and 20 mm. The larvae feed on the corn whorl and burrow into the stalk and ear.