Moscas-das-frutas (Diptera: tephritoidea) em um pomar experimental no estado de Mato Grosso do Sul: diversidade, dinâmica populacional, relações com hospedeiros e fatores ambientais

Abstract

Fruit flies (Diptera: Tephritoidea) in a mixed orchard at the brazilian MidWestern: diversity, population dynamics, host relationship and environmental factors. The knowledge about species composition of fruit fly in the Mid-Western Region of Brazil is scarce. The aim of this paper is to evaluate the population dynamics of fruit fly species in a mixed orchard with 21 fruit tree species (22º 13’ 16’’ S e 54º 48’ 20’’W) in the campus at Federal University of Grande Dourados (UFGD), Dourados-MS. The survey was carried out during two consecutive years of sampling (May 2005 to June 2007). A total of 14 McPhail traps, baited with the Bio Anastrepha® food attractant, were hung up in the branches of 14 fruit tree species. Some 11,775 fruit flies adults were caught belonging to eight genera: Anastrepha Schiner (1868), Ceratitis MacLeay (1868), Hexachaeta Loew (1873), Tomoplagia Coquillett (1910) and Blepharoneura Loew (1873) (Tephritidae); Dasiops Rondani (1856), Lonchaea Fallén (1820) and Neosilba McAlpine (1962) (Lonchaeidae). The result shows that the hosts with higher infestations by fruit flies in the orchard, were: starfruit (Averrhoa carambola L.) and guava (Psidium guajava L.), with the infestation indexes (larvae/kg) of 101.60 and 41.12, respectively. A. obliqua was the predominant species, in both, traps and fruits.