Abstract
An imported coccinellid, Propylea 14-punctata (L.), was maintained in the laboratory on an artificial diet and the following aphid species associated with small grains in Oklahoma: Schizaphis graminum (Rondani), Rhopalosiphum maidis (Fitch), R. padi (L.), Macrosiphum avenae (F.), Sipha flava (Forbes), Hysteroneura setariae (Thomas), and Aphis helianthi Monell. P. 14-punctata survived well on all species of aphids and on the synthetic diet when free water was accessible. Nutritional quality of the diet and aphid species varied, as evidenced by differences in: longevity, preoviposition period, and fecundity of adult beetles; beetle ova fertility; survival and percentage mortality by stadia of F1 generation immature beetle progeny; and sex ratio of F1 generation beetle progeny.
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