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  1. In this concise and fascinating account, Paul DeBach traces the historical background of biological control and examines in detail some of the most famous examples of the discovery abroad of new natural enemies and their importation into the US and elsewhere to achieve successful biological...
  2. Plants and animals produce many agents which can control life processes in insects or in other plants. Among them are attractants in insects, repellants in arthropods, insecticides in pyrethrum, in turnips, and in cruciferous crops, insect toxicants in crystalliferous bacteria, biologically...