BioControl (2002) 47, 625-643

Shu-Sheng Liu, F.B. Gebremeskel and Zu-hua Shi (2002)
Reproductive compatibility and variation in survival and sex ratio between two geographic populations of Diadromus collaris, a pupal parasitoid of the diamondback moth, Plutella xylostella
BioControl 47 (6), 625-643
Abstract: Diadromus collaris (Gravenhorst) (Hymenoptera: Ichneumonidae) has been recorded in many parts of the world as a major pupal endoparasitoid of the diamondback moth Plutella xylostella (Linnaeus) (Lepidoptera: Plutellidae). Experiments were conducted to compare reproductive compatibility and performance as affected by temperature between two geographic populations of D. collaris, one from Hangzhou, Zhejiang and the other from Lishan, Taiwan, China. The numbers and sex ratio of progeny in all possible crosses and backcrosses were similar to those obtained within each of the populations, demonstrating complete reproductive compatibility between the two populations. The two populations showed similar responses to temperature with respect to development time, adult longevity and number of host pupae parasitized per female. However, the population from Hangzhou achieved higher rates of survival from larva to adult emergence at high temperatures and had higher proportions of female progeny at some temperatures, than the population from Lishan. The Hangzhou population achieved higher intrinsic rates of increase at all temperatures tested from 15 to 33.5 °C, and the differences were significant at 30 and 32 °C. The differences between the two populations in ability to survive high temperatures may reflect their adaptation to local climates. The significance of the intraspecific variations revealed is discussed with regard to the use of geographic populations of the parasitoid in the biological control of P. xylostella.
(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): Shu-Sheng Liu, Zu-Hua Shi

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Plutella xylostella		China (south)
	Plutella xylostella		Taiwan
Diadromus collaris (parasitoid)			China (south)
Diadromus collaris (parasitoid)	Plutella xylostella		Taiwan