Host age preference in <i>Aphidius ervi</i> (Hymenoptera Aphidiidae)
AbstractHost age preference by Aphidius ervi Haliday on pea aphid Acyrthosiphon pisum (Harris) and the effects of host age on A ervi reproductive fitness and sex allocation were studied in the laboratory Aphidius ervi preferred aphids that were 35 days old over the younger (1 and 2 days old) and older (6 and 7 days old) aphids for oviposition The body size and egg load at emergence of A ervi progenies significantly increased with the increase of host age at the time of parasitisation from 1 to 4 days old after which no further increase occurred The results support the sizedependent sex ratio theory that A ervi deposits fertilised eggs in large hosts and unfertilised eggs in small ones The potential impact of the host age preference on biological control is discussed
How to Cite
He, X.Z., and Q. Wang. “Host Age Preference in <i>Aphidius ervi</i≫ (Hymenoptera Aphidiidae)”. New Zealand Plant Protection 59 (August 1, 2006): 195–201. Accessed February 7, 2023. https://journal.nzpps.org/index.php/nzpp/article/view/4541.