Pea Aphid

Pea Aphid

 

(Acyrthosiphon pisum), an insect of the order Homoptera, family Aphididae.

The body of the pea aphid is 4–5 mm long and velvety green in color. The insect is found in’Europe, Asia, North America, and Northern Africa. It damages alfalfa, clover, fodder legumes, peas, vetch, soybeans, and other legumes. It winters in the egg phase in perennial legumes. In spring it hatches, and from June through August it produces as many as ten generations parthenogenetically. It reproduces intensively on sappy young vegetation in moderately moist, warm weather. A bisexual generation appears in autumn and lays its eggs. Pea aphids can reduce a harvest considerably by sucking the sap from stems, leaves, and pods. Protective measures include treating the crops with aphicides and early sowing of early maturing varieties of cereals and legumes.

O. I. PETRUKHA

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Aphids and predators were allowed to interact for 14 d, a time period slightly longer than one pea aphid generation (Flint 1985).
The experiments described here were designed to estimate the magnitude of additive genetic variance in a population of the wasp Aphidius ervi in the ability to parasitize a moderately resistant genotype of the pea aphid Acyrthosiphon pisum.
Feeding and nutrition of the pea aphid Acyrthisiphon pisum (Homoptera: Aphididae), on chemically defined diets a various pH and nutrient levels.
carnea larvae developed faster on pea aphid reared on alfalfa than on pea aphid raised on faba bean.
Shaw has high resistance to Aphanomyces root rot (caused by Aphanomyces eutiches Drechs), and northern root-knot nematode (Meloidogyne hapla Chitwood), resistance to Phytophthora root rot, pea aphid (Acyrthosiphon pisum Harris), spotted aphid (Therioaphis maculata Buckton) and has moderate resistance to Verticillium wilt (Verticillium albo-atrum Reinke & Berthier), anthracnose (Colletotrichum trifolii Bain and Essary) Race 1, and stem nematode [Ditylenchus dipsaci (Kuhn) Filipjev].
Feeding deterrency of some pyrrolizidine, indolizidine, and quinolizidine alkaloids towards pea aphid (Acyrthosiphon pisum) and evidence for phloem transport of indolizidine alkaloid swainsonine.
This isolate was specifically transmitted by the pea aphid.
Thermal constants for development of the pea aphid (Homoptera: Aphididae) and its parasites.
and the pea aphid [Acyrthosiphon pisum (Harris)]; moderately resistant to stem nematode [Ditylenchus dipsaci (Kuhn) Filipjev), and spotted alfalfa aphid [Therioaphis maculata (Buckton)] and is susceptible to anthracnose (caused by Colletotrichum trifolii Bain & Essary), phytophthora root rot [caused by Phytophthora megasperma Drechs.
Amino acid composition of phloem sap and the relation to intraspecific variation in pea aphid (Acyrtosiphon pisum) performance.
and the pea aphid [Acyrthosiphon pisum (Harris)]; moderately resistant to stem nematode [Ditylenchus dipsaci (Kuhn) Filipjev], and spotted alfalfa aphid [Therioaphis maculata (Buckton)]; and susceptible to anthracnose (Colletotrichum trifolii Bain.
For example, Regiella infection of the pea aphid is affected by environmental factors, including temperature and precipitation, as well as host-plant species.