气象因子对芒果园桔小实蝇种群动态的影响

桔小实蝇Bactrocera dorsalis(Hendel)]是芒果的重要害虫之一。试验利用性引诱剂对芒果园桔小实蝇的全年种群动态进行监测,分析气象因子与其种群数量变动的相关性。结果表明,芒果园桔小实蝇雄虫种群数量一年有2个明显高峰,2月为短时高峰,3月种群活动有所下降;5月开始数量逐渐升高,至8月达到高峰,9月开始逐渐下降,到12月至1月为发生低谷。经逐步回归分析发现,气象因子显著影响桔小实蝇雄虫的数量,主要受月平均气温、月平均最低气温和月降水量综合影响。

Effect of Climatic Factors on Population Dynamics of Bactrocera dorsalis in Mango Plantation

Bactrocera dorsalis (Hendel) was one of the main pests of mango.The population dynamics of B.dorsalis was monitored with pheromone methyleugenol traps all year round,and the correlation between the population change of B.dorsalis and the climatic factors were analyzed.The results showed that the male population of B.dorsdis had two peaks a year in mango plantations,in Feburary and August.The male population had a short-term peak in February,and its activity declined in March;it gradually increased from May,came to the other high peak in August,then gradually decreased from September,and remained low from December to January.The stepwise regression analysis indicated that climatic factors significantly affected the number of B.dorsalis.These climatic factors included monthly average temperature,monthly minimum temperature and monthly rain fall.