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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.
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.
Chevrolat in Dejean, 1836 [1] 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 .
The speckled wood butterfly is univoltine in the northern part of its range, e.g. northern Scandinavia. Adults emerge in late spring, mate, and die shortly after laying eggs; their offspring will grow until pupation, enter diapause in anticipation of the winter, and emerge as adults the following year – thus resulting in a single generation of butterflies per year.
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.
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 male European corn borer produces a spermatophore ejaculate that contains spermatozoa to fertilize the female and protein to nourish the female, a nuptial gift. The cost of producing a spermatophore is relatively low compared to the female investment in oviposition. Males mate an average of 3.8 times during their life.
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).