Study of Abundance of Fruit Fly in Peach

Abstract

Studies on abundance of fruit fly in peach orchards were carried out in 1987 at Maesalong Mountain, Chaingrai and Maceae Mountain, chaingrai and Maceae Mountain, chiangmai and during 1988 - 1990 at Bannonghoi; Chaiangmai by hanging two steiner traps per 25 trees. Traps were hung both high and low level and marginal and central areas in the orchard. The male flies were caught in traps containing an emulsion of methyl eugenol and malathion and they were counted every 2 weeks. Three species namely Bactocera dorsalis, B. tuberculatus and B. nigrotibialis were found in traps form every orchard and two species: B. dorsalis, B. tuberculatus and unknown species were found infested fruits. The maximum population was found during May-June. furthermore, it was found that two weeks catch of the B. dorsalis showed significantly positive correlation with average temperature.