海南儋州地区橘小实蝇成虫数量动态

【背景】橘小实蝇是热带、亚热带水果的重要害虫,在海南发生严重。【方法】利用橘小实蝇性诱剂进行田间诱捕,以诱到的雄成虫为指标,通过定期调查,获得了海南儋州地区4种样地橘小实蝇成虫的种群动态,并进一步通过相关分析,研究了芒果园橘小实蝇种群动态与温度和降雨量的相关性。【结果】儋州地区橘小实蝇种群周年发生,冬季种群数量较低,夏季种群数量较高。橘小实蝇种群高峰期发生于6月,其中芒果园达327.6头,蔬菜地为182.8头,办公区为150.0头,植物园为209.6头。在芒果园中,随着温度的升高,橘小实蝇的种群数量呈指数增长,其相关系数R=0.799;而与降雨量的相关系数较低,为0.367。【结论与意义】本研究可为儋州地区制定橘小实蝇综合防治策略提供理论依据。

Adult population dynamics of Bactrocera dorsalis (Hendel) in Danzhou City, Hainan

Background] Bactrocera dorsalis (Handel) is a major pest on fruit crops in tropical and sub-tropical area, including Hainan Province, China. Method] Pheromone lures for capturing male adult B. dorsalis were used to study the seasonal dynamics in four areas in Danzhou City, Hainan. The correlation between adult numbers and temperature and rainfall was also examined. Result] B. dorsalis adults emerged throughout the year, with fewer adults in winter and more in the summer. The peak population densities were observed in June, with 327.6 adults captured during the month in a mango orchard, 182.8 in a vegetable field, 150.0 in a built-up area, and 209.6 in a botanical garden. An exponential increase in captures was found with increasing temperature in the mango orchard (correlation coefficient R=0.799), while lower correlation was found with rainfall (R=0.367). Conclusion and significance] The results could serve as a useful theoretical basis for formulating IPM strategies to B. dorsalis in Danzhou.