<div class="description">
Subjects: grains; Greenbug Control; Grain Diseases and pests; Schizaphis graminum; Aphididae; life history; natural enemies; biological control agents; Lysiphlebus testaceipes; parasitoids; grain crops; Aphidoidea; parasites</div>
<div class="fn value">
Walton, William Randolph,</div>
Internet Archive identifier