Environmental Entomology (1987) 16, 877-880

R. Bueno Jr. and J.D. Stone (1987)
Reproductive response of Aphelinus perpallidus (Hymenoptera: Aphelinidae) to age of its parent and density of its host, Monellia caryella (Homoptera: Aphidae)
Environmental Entomology 16 (4), 877-880
Abstract: The aphid parasite, Aphelinus perpallidus (Gahan), was exposed to different densities, (0.125, 0.25, 0.50, 0.75, and 1.0 aphids per cm²) of its host, Monellia caryella (Fitch). Aphid density and fecundity of unmated and mated A. perpallidus were significantly related. Mated females produced both male and female offspring, whereas unmated females produced only males. Adult parasite emergence was not significantly affected by host density. There was no significant difference in emergence between mated and unmated females. Significantly more male parasites emerged at all densities. Parental age of unmated or mated A. perpallidus females did not significantly affect parasite fecundity or emergence. Fecundity and emergence were significantly higher with unmated females. Mated females produced significantly more male progeny. These data indicate that mated A. perpallidus females from 0 to 14 d old must be used and exposed to aphid density levels of 0.50-0.75 aphids per cm² to obtain enough parasitism in order to have higher production of female progeny.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

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.
	Monellia caryella	Pecan/hickory (Carya)
Aphelinus perpallidus (parasitoid)	Monellia caryella	Pecan/hickory (Carya)