Biocontrol Science and Technology (1997) 7, 153-164

Marc Kenis (1997)
Biology of Coeloides sordidator (Hymenoptera: Braconidae), a possible candidate for introduction against Pissodes strobi (Coleoptera: Curculionidae) in North America
Biocontrol Science and Technology 7 (1), 153-164
Abstract: Various aspects of the biology of Coeloides sordidator, an ectoparasitoid of pine weevils of the genus Pissodes, were studied. When reared in the laboratory on P. castaneus, females preferred to oviposit on third and fourth instar larvae in galleries, but ovipositions were also observed on second instars and prepupae. Pupae were not accepted as hosts. At 23 Cand a 16 h day length, pre-imaginal development lasted 15-20 days. For each parasitoid population tested, between 8 and 28% of the individuals diapaused as prepupae in cocoons. The rate of diapause was not influenced by the photoperiod during larval development. In contrast, diapause was induced by a short day photoperiod on parents before and during oviposition and by low temperatures during the larval stage. Diapause termination was achieved by cold storage at 2 C for at least 8 weeks. Rearing of C. sordidator on P. castaneus under natural conditions showed that in the Swiss Jura it is mainly univoltine, with less than 10% of the parasitoids emerging for a second generation. When C. sordidator females were offered healthy P. castaneus larvae and larvae parasitized by the braconid endoparasitoid Eubazus semirugosus, there was no evidence that they were able to discriminate between healthy and parasitized hosts. The potential of C. sordidator as a biological control agent against the North American species P. strobi is discussed.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Marc Kenis

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
classical biocontrol/new introduction
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Pissodes strobi
Coeloides sordidator (parasitoid)	Pissodes strobi