Species of Anastrepha (Diptera: Tephritidae) in orchards of guavas: diversity, population fluctuation, and host phenology

ABSTRACT:Studies were carried out in guava orchards, in two municipalities of the State of Sâo Paulo, Brazil. In Monte Alegre do Sul, the survey was done in an experimental station of Agência Paulista de Tecnologia dos Agronegócios, in which 13 Anastrepha species were collected from January 2002 to December 2003. In Monte Alto, in a commercial orchard, eight species were captured, from January to December 2004. Anastrepha fraterculus was the most frequent species in both municipalities. The climatic parameters had low influence on the population fluctuation of the Anastrepha species in both orchards. The most common population peaks of Anastrephaspecies varied between the orchards. The availability of fruits in the orchard and nearby them is the factor that determines the size of the fruit fly populations.

摘要：本研究于巴西圣保罗州的两处番石榴果园开展。在南蒙特阿莱格雷（Monte Alegre do Sul）的圣保罗州农业综合企业技术局（Agência Paulista de Tecnologia dos Agronegócios）试验站内，研究团队于2002年1月至2003年12月间采集到13种阿纳实蝇属（Anastrepha）物种。在蒙特阿尔托（Monte Alto）的一处商业果园中，2004年1月至12月期间共捕获8个该属物种。阿纳实蝇属的南美按实蝇（Anastrepha fraterculus）为两处调查点中出现频率最高的物种。气候参数对两处果园内阿纳实蝇属物种的种群波动影响较弱。不同果园中阿纳实蝇属物种的典型种群高峰存在差异。果园及周边区域的果实可获得性是决定实蝇种群规模的核心影响因素。