气候因子和寄主植物对苏州桔小实蝇种群动态的影响

[目的]揭示苏州桔小实蝇种群变动规律以及影响其变动的主要成因。[方法]通过对苏州梨园桔小实蝇种群动态的监测,分析气候因子和寄主植物对该种群变动的影响。[结果]在苏州地区,梨园桔小实蝇成虫种群增长为单峰型,成虫种群高峰期为9、10月,11月份至翌年5月份,桔小实蝇成虫种群数量最低。影响梨园桔小实蝇的气候因子有月平均气温及最高气温和最低气温、月极端最高气温和最低气温、月降雨量、月降雨天数及寄主等,其中月平均气温及最高气温和最低气温、月降雨天数以及寄主植物是影响桔小实蝇种群数量迅速增长的重要因素。枣是当地桔小实蝇最喜好的寄主水果。[结论]该研究为全面认识江苏省桔小实蝇发生规律提供重要数据。

Effect of Climate Factors and Host Plants on Population Dynamics of Bactrocera dorsalis (Hendel) in Suzhou

[Objective] This study aimed to open out the population fluctuation law of Bactrocera dorsalis Hendel(Diptera: Tephritidae) in Suzhou and its main cause of influencing its change.[Method] The population dynamics of B.dorsalis was monitored in pear orchard in Suzhou to analyze the effect of climate factors and host plants on its population fluctuation.[Result] In Suzhou area,the population increment for B.dorsalis adult in pear orchard showed the single peak type.Its peak appeared in September or October and its population amount was lowest from November to May next year.There were a lot of climate factors affecting the population fluctuation including monthly mean temperature,maximum temperature and minimum temperature,monthly extreme maximum temperature and minimum temperature,monthly rainfall and raining days,and post plants,among which,the monthly mean temperature,maximum temperature and minimum temperature,monthly raining days and post plants were the major climatic factors influencing the population amount of B.dorsalis.Zizyphus jujuba was its most favorite host fruit.[Conclusion] This study provided the important date for fully understanding the occurrence regularity of B.dorsalis in Jiangsu province.