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Laboratory biology of diabrotica tibialis and a closely related diabrotica sp coleoptera chrysomelidae



Laboratory biology of diabrotica tibialis and a closely related diabrotica sp coleoptera chrysomelidae



Journal of the Kansas Entomological Society 60(3): 446-450



The laboratory biologies of two closely related, little-known species of Diabrotica were studied. One species, D. tibialis Jacoby, is found in southern Texas [USA] and Mexico, and the other is an undescribed species from Mexico. Both species were non-diapausing in the egg stage, and both had three larval instars and an inactive prepupal stage, the mean immature period (post hatch) was 26 days for D. sp. and 29 days for D. tibialis. Head capsule sizes for D. sp. were: first instar from 262 .mu. to 294 .mu. (.hivin.x=266.36), second instar from 392 .mu. to 458 .mu. (.hivin.x=411.39), and third instar from 605 .mu. to 687 .mu. (.hivin.x=639.78). As larvae, both species fed on taxonomically diverse plant species, but corn was the preferred host of those plants tested. Males of D. sp. did not mate until 5 to 8 days after emergence, but females were ready to mate within 1 day after emergence. Males were capable of mating more than once, but repeatfed matings for females were not necessary for the continued laying of viable eggs. Females of D. sp. laid a mean of 3673 eggs and lived a mean of 244 days, whereas females of D. tibialis laid a mean of 1044 eggs and lived a mean of 333 days.

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Accession: 005787530

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