Journal
BIOLOGICAL CONTROL
Volume 51, Issue 3, Pages 471-474Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.biocontrol.2009.08.010
Keywords
Biological control theory; Host-parasitoid interactions; Host suppression; Natural enemy selection criteria; Prolonged diapause
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Funding
- ANPCyT [PICT 06-01200]
- INTA, Argentina [PNFOR 2212]
- CNRS, France [PICS 4144]
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Delayed emergence, a life history feature of many insects living in unpredictable environments, can have major consequences for the dynamics of host-parasitoid interactions, which vary according to their physiological interactions. We studied, through simple modeling, the significance of prolonged diapause on the suppression levels achieved by parasitoids and illustrate our case with a system involving a major forest pest, the woodwasp Sirex noctilio and two of its parasitoid species that have been introduced into different geographical regions through classical biological control programmes. Our findings suggest that the physiological relationship between parasitoid and host delayed emergence patterns may help understand observed variable success in several bio-control programs. We conclude that for given environments, host delayed emergence and the way in which parasitoids deal with it, should be included in the list of selection criteria of natural enemies of many pests, especially those affecting forests. (C) 2009 Elsevier Inc. All rights reserved.
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