Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Biology of groundnut aphid, Aphis craccivora Koch on cowpea, Vigna unguiculata (Linnaeus) Walpers.

Abstract

Aphis craccivora underwent 4 nymphal instars on cowpeas (Vigna unguiculata) in the laboratory, the nymphal period averaging 5.6, 5.1, 5.15 and 4.86 days, resp., in May-June, August-September, October-November and March-April. The corresponding durations of the total life cycle were 11.07, 11.15, 10.79 and 10.42 days.