The Biology of Three Chrysopid Predators of the Cotton Aphid1

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Abstract
The biology of 3 sp. of Chrysopa, found in aphid-infested cotton fields, was studied at College Station, Texas. Two species, rufilabris and plorabunda, overwinter in this area as adults, while oculata probably overwinters as prepupae in the soil. The life history and habits of oculata differ from those of the other 2 species mainly in adult feeding, number of eggs deposited and in the fact that the larvae enter the soil to form cocoons and pupate. Adult oculata feed directly on aphids, whereas adult plorabunda and rufilabris feed only on honeydew or other liquids. The maximum number of eggs deposited by an individual oculata was 921, compared with 85 for lorabunda and 87 for rufilabris. Laboratory tests showed the rvae of the 3 species to be voracious feeders on the cotton aphid.

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