亳州烟田生物种群动态与群落结构的研究

Study on propulation dynamics and community structure of insects in Bozhou tobacco fields

研究表明，亳州烟区常见的烟草害虫有８科８种，害虫的天敌有５科５种，其中烟蚜、烟青虫和斑须蝽为主要害虫；烟蚜茧蜂是烟蚜的重要天敌，对控制烟蚜种群增长作用明显。烟田生物群落的多样性指数越大，稳定性指数亦越大；６月上旬田间生物群落的多样性、稳定性指数均为最高，是抵抗外界干扰能力和恢复原状态的最佳期。烟蚜是聚集分布时，烟蚜茧蜂、龟纹瓢虫等几种常见天敌在田间的水平分布格局也为聚集分布，从而提高了对害虫的综合控制作用，通过建立烟蚜、烟蚜茧蜂种群增长模型，揭示了其种群消长与时间变动的关系。

There were 8 species of 8 different families insect pests,which mainly were Myzus persicae Sul-zer ,Chloridea assulta Guenee and Dolycoris baccarum Linnaeus,and 5 species of 5 families natural enimies in Bozhou tobacco areas.Aphidius gifuensis Asmead played an important role in controling aphid population. While the diversity exponent of biological community was high, the stable exponent was great.The diversity and stable exponents of community were mostly high in early June in the field, which was the best period for plant to resist the external disturbances and mantain its activities. When the aphid was cluster distribution,Aphidius gifuensis and Propylaea jafuensis Thundery also showed cluster distribution to increase the control effect.The model of pests and its enimies indicated the relations between population dynamics and time.