By David L.; Robert Silverstein & Minoru Nakajima (eds.) Wood
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Additional resources for Control of Insect Behavior by Natural Products
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Separated neutral fraction evaporated and I Residuum (N) steam distilled 1 Distillate (D) (Biting factor) (Attractant) > > a 50 > CONTROL OF INSECT BEHAVIOR IV. A. Attractants Biological Test The following biological test was used for evaluation of the activity. 3 cm dia) at equal intervals, and the paper was placed in a petri dish. Wet cellulose powder on which the sample was absorbed, and con trols (wet cellulose only) were placed alternately in the small circles. Thirty newly hatched larvae were placed on the center of the filter paper.
It is clear that feeding an oligophagous or polyphagous caterpillar on a particular plant can induce a preference for that plant provided it is a normal host plant. The induced preference is specific for the inducing plant and is not merely a change in the insect*s general threshold of food acceptability. This equality of consumption could occur as a consequence of similar amounts of a common phagostimulant in the three plants or of three different taste qualities equally preferred. If the former, then induction of increased feeding on one plant should also cause increased ingestion of the others.