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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.
Crop rotation is a consistent and economical means of controlling rootworms the season following an outbreak in corn-growing areas where rootworm beetles primarily lay eggs in corn. As a way to reduce rootworm densities, it is more effective than insecticides. [2] Corn rootworm larvae must feed on corn roots to develop and mature properly.
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
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The eggs hatch around mid spring and take 6–9 days to hatch under favorable conditions. [1] In some cases, specifically when the climate is at a lower temperature, eggs can take 30 days to hatch. [8] The ideal soil for egg survival is moist. [8] The larval stage lasts around 2–3 weeks [1] and the larvae are yellowish and wormlike. [9]
For example, the northern corn rootworm (Diabrotica barberi) became adapted to a corn-soybean crop rotation by spending the year when the field is planted with soybeans in a diapause. [6] As of 2014, few new weed killers are near commercialization, and none with a novel, resistance-free mode of action. [7]
Life stages, clockwise starting at top: adult moth, non-diapausing (spotted) last-instar larva, diapausing (immaculate) larva, pupa, eggs (laid on wax paper), first-instar larva (above date on coin) Larval stage. The southwestern corn borer, Diatraea grandiosella, is a moth belonging to the sub-order Heterocera.
It includes two subspecies, Diabrotica virgifera virgifera (the western corn rootworm) and Diabrotica virgifera zeae (the Mexican corn rootworm). [2]
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