Environmental Entomology (1990) 19, 32-35

T.E. Mittler and L. Wilhoit (1990)
Sexual morph production by two regional biotypes of Myzus persicae (Homoptera: Aphididae) in relation to photoperiod
Environmental Entomology 19 (1), 32-35
Abstract: A biotype of the green peach aphid, Myzus persicae (Sulzer), from Yakima, Wash. (46°34'N) produced gynoparae and males in response to daily scotophases that were 1.0-1.5 h shorter than those needed to induce the production of these morphs by a biotype of M. persicae derived from a more southern latitude (40°N) in Spain. Predictions regarding the production of these morphs under fall conditions in their regions of origin are consistent with field observations in these regions.
(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:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Myzus persicae		Spain (continental)
	Myzus persicae		U.S.A. (NW)