Entomology, Department of


Document Type


Date of this Version



Journal of Economic Entomology 61:5 (October 1968), pp. 1424–1427.

doi: 10.1093/jee/61.5.1424


Copyright © 1968 Entomological Society of America; published by Oxford University Press. Used by permission.


Under a conventional plowing system, eggs of Diabrotica virgifera LeConte were more uniformly deposited in the top 6 inches of the soil profile than under a reduced strip-tillage system which resulted in heaviest egg deposition in the furrow or ridge. Equal numbers of eggs were deposited in both systems. After corn was planted, more eggs occurred in the seedling zone in conventionally planted corn; in till-plant corn, eggs were removed from the seed row, and eggs concentrated in the furrow were covered with additional soil. Adult emergence was 5–10 days later in till-plant corn than in the conventional tillage system.