Environmental Entomology (1981) 10, 307-312

Barry Annis, George Tamaki and Ralph E. Berry (1981)
Seasonal occurrence of wild secondary hosts of the green peach aphid, Myzus persicae (Sulzer), in agricultural systems in the Yakima Valley
Environmental Entomology 10 (3), 307-312
Abstract: Populations of the green peach aphid, Myzus persicae (Sulzer), and associated weed hosts were monitored continuously from April 1978 to March 1979 on the floor of three peach orchards and the bank of a drainage ditch. Aphid populations at all sites peaked in spring and declined in summer. Although natural enemies were most active during the period of peak aphid abundance, they were not numerous enough to account for population declines at all locations. In 2 orchards, significant positive correlations were found between green peach aphid populations and the abundance of preferred host plants. No such correlation was found in the third orchard, where aphids were less abundant and patchily distributed, or in the ditch bank, where pathogens and climatic factors may have limited the aphid population.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Ralph E. Berry

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
environment - cropping system/rotation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Myzus persicae	Peach/nectarine (Prunus persica)	U.S.A. (NW)