Abstract
Abstract The brown citrus aphid, Toxoptera citricida (Kirkaldy), is an exotic pest of citrus in the United States that was introduced into Florida in 1995. The native parasitoid Lysiphlebus testaceipes (Cresson) has demonstrated acceptance of the brown citrus aphid as a host. This experiment evaluated the effect of citrus host plants on brown citrus aphid parasitism by L. testaceipes, and the effect of temperature on development of the parasitoid. The levels of parasitism achieved by L. testaceipes were similar among brown citrus aphid populations on five citrus cultivars used as host plants for the aphids (range 34–36%). The percentage of adult parasitoid emergence was highest on ‘Duncan grapefruit’ (82%) and significantly lower on ‘Mexican lime’ (63%) than on any of the other citrus cultivars. The proportion of adults that were female was significantly higher on ‘Duncan grapefruit’ (81%) than on any of the other cultivars. The results demonstrate that the effects of multiple trophic levels can influence...
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