Keys for the identification of aphids (Homoptera). I. Winged aphids of species economically important in Thailand.
Keys are presented to 11 species of aphids that are injurious to agricultural crops in Thailand; the species are Toxoptera odinae (v.d. Goot), T. aurantii (Boy.), T. citricida (Kirk.), Myzus persicae (Sulz.), Lipaphis erysimi (Kalt.), Aphis gossypii Glov., A. craccivora Koch, A. citricola v.d. Goot, Hysteroneura setariae (Thos.), Melanaphis sacchari (Zhnt.) and Rhopalosiphum maidis (Fitch). Also provided are aids for preliminary identification in the field, detailed species descriptions and illustrations, lists of food-plants and vectored viruses, and data on distribution.