橘小实蝇实验种群在北京地区的越冬研究

Study on overwintering of experimental population of Bactrocera dorsalis in Beijing

为明确橘小实蝇实验室种群早期蛹能否在北京越冬,于2017年冬季在北京市房山区、平谷区、顺义区的果园内开展试验。将在实验室适宜温、湿度条件下饲养并经低温驯化的橘小实蝇早期蛹掩埋于园内土壤中,并用养虫笼罩住。2018年4-10月,每2个月检查1次橘小实蝇蛹的羽化情况,未发现羽化现象,10月回收时发现蛹均变黑、僵化而死亡。因此,得出结论:橘小实蝇实验室种群早期蛹不能在北京地区果园土壤中越冬。

The study on overwintering of early pupae of Bactrocera dorsalis experimental population was conducted in orchard in Fangshan District, Pinggu District and Shunyi District of Beijing in China in 2017. Early pupae of B. dorsalis lab population treated with low temperature acclimation were buried under the soil in the orchards and covered with cages.The emergence of B. dorsalis was investigated once every 2 months from April to October in 2018. No emergence was found, and the pupae turned black, ossified and died as recycling in October. It was concluded that experimental population of Bactrocera dorsalis can not overwinter in the soil in orchards in Beijing.