Host age preference in <i>Aphidius ervi</i> (Hymenoptera Aphidiidae)

Authors

  • X.Z. He
  • Q. Wang

DOI:

https://doi.org/10.30843/nzpp.2006.59.4541

Abstract

Host 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

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Published

2006-08-01

How to Cite

[1]
He, X. and Wang, Q. 2006. Host age preference in &lt;i&gt;Aphidius ervi&lt;/i&gt; (Hymenoptera Aphidiidae). New Zealand Plant Protection. 59, (Aug. 2006), 195–201. DOI:https://doi.org/10.30843/nzpp.2006.59.4541.

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