扶桑绵粉蚧田间种群消长动态研究

扶桑绵粉蚧田间种群消长动态研究(7500字)
摘  要：在自然条件下通过在湖南农业大学实习基地不同地点的调查研究发现了扶桑棉粉蚧在农大的发生规律。了解了影响扶桑绵粉蚧种群消长的影响因素有：不同寄主、气象因素、捕食性天敌、寄生性天敌及其他昆虫，鉴定了扶桑绵粉蚧雄成虫、雌成虫、一龄，二龄、三龄若虫的形态特征。并组建自然温度条件下该虫种群消长动态图。实验结果表明：暴雨、捕食性天敌、寄生性天敌对扶桑绵粉蚧的种群数量增长有抑制作用，蚂蚁对扶桑绵粉蚧种群数量增长有促进作用。扶桑绵粉蚧在芙蓉花和苍耳上的扶桑绵粉蚧生长情况种群消长动态及寄主死亡时间也不尽相同。
关键词：种群消长 不同寄主 天敌 气象因素

The study on the dynamic growth and decline of the population of the field Phenacoccus solenopsis Tinsley
Abstract: in the natural conditions in Hunan Agricultural University base through the investigation and study different sites found Phenacoccus solenopsis Tinsley in the occurrence of pest regularly. Currently Master influence the pest population growth Phenacoccus solenopsis Tinsley has: the influence factors of different host, meteorological factors, the predatory natural enemy, parasitoids and other insect pest, understand Phenacoccus solenopsis Tinsley , female adult male adult age, two age, the age of nymphs, three morphological characteristics. And form a corresponding temperature conditions the pest population dynamics table. Experimental results show that: the storm, the predatory natural enemy, parasitic days hostile Phenacoccus solenopsis Tinsley populations growth has inhibitory effect. Ants to the pest population Phenacoccus solenopsis Tinsley quantity growth have stimulative effect.Phenacoccus solenopsis Tinsley xanthium in hibiscus flowers and pest on these two host the growth of population growth time of death also different dynamic host.

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