Biological studies and host range of Leucopis sp. (Chamaemyiidae: Diptera), a predatory fly on aphids in the Punjab.
Laboratory studies were carried out in India in 1972 on the biology and host range of Leucopis sp., a chamaemyiid that preys on aphids in the Punjab. The fly was active throughout the year but was commonest in winter. Eggs were laid near aphid colonies, subsequent predator numbers depending on prey density. Fly larvae ate 40-60 aphids during their development. The egg, larval, pupal and adult stages of the fly lasted 3-4, 10-12, 15-20 and 2-3 days, respectively. Prey species included Aphis craccivora Koch, Therioaphis trifolii (Monell), A. gossypii Glov., Rhopalosiphum maidis (Fitch), Sitobion miscanthi (Tak.) (Macrosiphum miscanthi), Melanaphis sacchari (Zhnt.), Myzus persicae (Sulz.), Lipaphis erysimi (Kalt.), Brevicoryne brassicae (L.) and A. nerii Boy. Descriptions of the life stages of the fly are given.