Title page for ETD etd-03302010-020553

Type of Document Master's Thesis
Author Eaton, Alan Tucker
URN etd-03302010-020553
Title Biological control agents of soybean insect pests in the Tidewater area of Virginia.
Degree Master of Science
Department Entomology
Advisory Committee
Advisor Name Title
Smith, James C. Committee Chair
Eaton, John L. Committee Member
Grayson, James McD. Committee Member
Kok, Loke T. Committee Member
  • soybeans
  • insect pests
Date of Defense 1975-01-05
Availability restricted

The species of biological control agents which affect soybean pests in the Tidewater area ~ere investigated, and their relative values were determined.

Two pentatomids, Podisus Macu1iventris Say and Stiretrus anchorago F., were the only significant bio-contro1 agents which attacked the Mexican bean beetle, Epi1achna varivestis Mulsant. These predators were not able to hold the pest population in check.

A parasitic fly, Trichopoda pennipes F. was the only important biological control agent which attacked the green stinkbug, Acrosternum hilare (Say). Host and habitdt preferences of the fly suggested the presence of two strains in Virginia. Distribution of the fly was very uneven.

Fungal disease was found to be an important control agent of many (larval) Lepidoptera. It was the most important control agent of Plachypena scabra (F.). P. scabra was also controlled by predation and parasitism. Nine parasites attacked the larvae and pupae.

No effective biological controls were found for the corn earworm, Heliothis zea (Boddie). The only significant control agent, fungal disease, acted too slowly to prevent economic damage by this insect.

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