Comparison of Two Species of Aphids (Hemiptera: Aphididae) on Nine Host Plants Using Age Specific Fecundity and Survival

摘要

This study characterized nine host plants for age-specific fecundity and survival by two aphid species. The ability of host-plants to provide refugia for cotton aphid, Aphis gossypii Glover, and green peach aphid, Myzus persicae (Sulzer), is importantfor the colonization of summer infestations on commercial crops. Fecundity was measured on detached leaves in petri dishes held in an incubator under controlled light, temperature, and humidity. The cotton aphid had greatest intrinsic rate of increase on bean, kenaf, and shepherd's purse. The green peach aphid had greatest intrinsic rate of increase on shepherd's purse, fiddleneck, pepper, and malva. Pepper was a poor host for cotton aphid, while cotton was a poor host for green peach aphid, and Powell's amaranth was a poor host for both aphid species. Variations in the ranking patterns of host plants among fecundity, survival, and intrinsic rate of increase are compared with other aphid life-table studies.