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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.
In the 1980s northern corn rootworm began to be a problem by beating the corn rotation practice with extended diapause eggs. [12] The eggs remained in the soil for two years or more before hatching, thereby avoiding the soybean year. As of 2017, this adaptation has been observed in areas of Iowa, Minnesota and South Dakota, Wisconsin and ...
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
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.
Diapause is observed in all the life stages of arthropods, especially insects. Activity levels of diapausing stages can vary considerably among species. Diapause may occur in a completely immobile stage, such as the pupae and eggs, or it may occur in very active stages that undergo extensive migrations, such as the adult monarch butterfly ...
It includes two subspecies, Diabrotica virgifera virgifera (the western corn rootworm) and Diabrotica virgifera zeae (the Mexican corn rootworm). [2]
Specific delta-endotoxins that have been inserted with genetic engineering include Cry3Bb1 found in MON 863 and Cry1Ab found in MON 810, both of which are maize/corn cultivars. Cry3Bb1 is particularly useful because it kills Coleopteran insects such as the corn rootworm, an activity not seen in other Cry proteins. [1]
Diapause, also known as hibernation, is induced in European corn borers by changes in temperature and daylight length. At higher temperatures, shorter photoperiods are sufficient to induce diapause. At 13.5 hours of light followed by 10.5 hours of dark, 100% of European corn borer larvae entered diapause regardless of temperature with the range ...