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Does rearing an aphid parasitoid on one host affect its ability to parasitize another species?
Author(s) -
Vafaie Erfan K.,
Fitzpatrick Sheila M.,
Cory Jenny S.
Publication year - 2013
Publication title -
agricultural and forest entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.755
H-Index - 55
eISSN - 1461-9563
pISSN - 1461-9555
DOI - 10.1111/afe.12022
Subject(s) - biology , parasitoid , myzus persicae , aphid , generalist and specialist species , host (biology) , parasitism , biological pest control , pest analysis , zoology , ecology , botany , habitat
Generalist parasitoids are commonly used for the biological control of insect pests; however, they are often reared on a single host species because this is more practical for commercial production. Few studies have investigated the consequences of rearing a generalist parasitoid on a single host species in terms of performance on other target pests. We investigated the impact of rearing the generalist parasitoid Praon unicum S mith ( H ymenoptera: B raconidae, A phidiinae) on an alternative aphid host Myzus persicae S ulzer ( H emiptera: A phididae) with respect to its ability to perform on Ericaphis fimbriata R ichards ( H emiptera: A phididae), a pest of highbush blueberries. Parasitoids reared on the two aphid hosts did not differ in physical size measurements. Praon unicum reared on M. persicae had a lower oviposition success over 6 days compared with insects reared on E. fimbriata , mainly as a result of differences early in life. There was no difference in parasitoid egg size, lifetime fertility, age‐specific fertility, female offspring ratio, development time or calculated intrinsic rate of increase from the two aphid hosts. We conclude that there were no negative consequences of rearing P. unicum on M. persicae on its ability to parasitize E. fimbriata , although further field studies would need to be performed to investigate whether natal host influences parasitoid preference.