Abstract
Several aspects of host selection by Charips victrix (Westwood) were investigated. The following summarizes the experimental findings: (1) unparasitized aphids were probed but eggs were not deposited in them; (2) parasitized aphids were found readily among unparasitized aphids; (3) unparasitized pea aphids, Acyrthosiphon pisum (Harris), were probed more frequently by females than unparasitized spotted alfalfa aphids, Therioaphis trifolii (Monell); (4) more eggs were deposited in larvae of Aphidius smithi Sharma & Subba Rao through the pea aphid than in larvae of Trioxys complanatus Quilis through the spotted alfalfa aphid; and (5) C. victrix females could discriminate between suitable hosts (A. smithi) and unsuitable hosts (Aphelinus “L”) both through the pea aphid.
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