Immature Stages of the Western Corn Rootworm123
- 30 September 1966
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 59 (5) , 1139-1142
- https://doi.org/10.1093/jee/59.5.1139
Abstract
In 1963 a study was made of the larval instars and the pupae of the western corn rootworm, Diabrotica virgifera LeConte. Larvae fed on mature squash fruit and held in the dark at 20[degree]C consistently had 3 instars. Width of the head capsule was the most constant of the several structures measured and was therefore considered the most valid indicator of the larval inetar. Measurements of larvae collected in the field compared favorably with measurements of the 3rd-instar larvae reared in the laboratory. Calculations by Dyar''s method indicated that all instars had been observed. Female pupae were distinguished by a pair of obvious papillae on the 9th abdominal segment. The average time of development at 20[degree]C was 11 days for the 1st instar, 14 days for the 2nd instar, 27 days for the 3rd instar, and 15 days for the pupa.This publication has 4 references indexed in Scilit:
- Rearing the Western Corn Rootworm in the Laboratory2Journal of Economic Entomology, 1965
- Biology of the Banded Cucumber Beetle, Diabrotica balteata, in LouisianaJournal of Economic Entomology, 1962
- On the Biology and Egg-Laying Habits of the Western Corn Rootworm1Journal of Economic Entomology, 1957
- The Western Corn Rootworm, Diabrotica virgifera Lec. In Kansas1Journal of Economic Entomology, 1953