Скачать или смотреть Cowpea Aphids Aphis craccivora | Pest management

Cowpea Aphids Aphis craccivora | Pest management

Aphid craccivora:
Aphis craccivora, variously known as the cowpea aphid, groundnut aphid or black legume aphid, is a true bug in the family Aphididae.
A. craccivora is a relatively small aphid. Apterous viviparous females have a shiny black or dark brown body with a prominent cauda and brown to yellow legs. Immatures are slightly dusted with wax, adults without wax. Six-segmented antennae. Distal part of femur, siphunculi and cauda black. Apterae 1.4-2.2 mm.

Probably palearctic warm temperate in origin, A. craccivora now is virtually worldwide. It is particularly well distributed in the tropics, where it is one of the most common aphid species (CIE, 1983; Blackman and Eastop, 2000). A. craccivora has expanded its distribution in recent decades, now north to Siberia (Russia) and Alberta (Canada), south to Chile and Argentina.

adult and nymphs:
Apterous viviparous A. craccivora females have a shiny black or dark brown body with prominent cauda and brown to yellow legs. Immatures slightly dusted with wax, adults without wax.

Biology and Ecology:
A. craccivora is anholocyclic almost everywhere. In the tropics it is exclusively anholocyclic, with only females (winged and wingless) normally encountered, and parthenogenetic reproduction occurring throughout the year. The aphid is ovoviviparous, with females retaining eggs inside their bodies and giving birth to small larvae. In areas with colder winters, overwintering may be as egg or hibernation. Males are alate and sexual forms have been recorded from Germany, Argentina and India compares tropical and central European populations.

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