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Thesis (M.S.)—University of Nebraska—Lincoln, 1970. Department of Entomology.


Copyright 1970, the author. Used by permission.


The western corn rootworm, Diabrotica virgifera LeConte, is a serious pest of corn in Nebraska. Presently, farmers are limiting their control measures to spot insecticidal treatments of potential economically infested corn fields. These control measures are usually one of two types; an aerially-applied insecticide for adult control in the summer, or an insecticide applied at planting time by ground equipment. However the apparent need for yearly insecticidal treatments seems to indicate that new control measures should be pursued.

The purpose of this research was threefold: (1) to determine rootworm control possibilities by a single blanket spray over a large area aimed at the adult rootworm by an aerially applied, non-persistent ultra-low-volume (ULV) formulated insecticide, (2) to gather data concerning agronomic practices used by farmers for possible application in population control of the rootworm, and (3) to gather population data for all stages of the rootworm for possible statistical correlations which might prove helpful in estimating subsequent population levels based on the known populations of a single stage of the rootworm.

Advisor: Kenneth P. Pruess