衢州地区灯下油茶害虫多样性及种群动态

Diversity and population dynamics of pest insects of Camellia oleifera captured by ultra violet light in Quzhou

油茶(Camellia oleifera)是中国亚热带地区重要的经济林树种之一,现已大面积栽培,但油茶害虫一直未受到充分关注。本研究系统调查了浙江省衢州地区灯下油茶害虫和天敌昆虫的种类,分析了其多样性及种群季节动态。结果表明:在衢州地区灯下油茶害虫共有103种,隶属于6目33科81属;2012—2013年,共诱集各类油茶害虫41521头,以食叶害虫为主;油茶害虫的种类及种群数量季节变化明显受到气候条件、油茶生育期和茶果采摘的影响;5—9月为油茶害虫活动高峰期,4月和10月是过渡期,油茶害虫与天敌均由越冬转入活动或由活动转入越冬;黑光灯对油茶害虫天敌有一定的诱集作用,共诱集天敌昆虫21种983头。本研究结果为油茶害虫的综合治理提供了科学依据。

Camellia oleifera is one of the most important economic trees and has been planted widely in subtropical areas in China. But the pest insects feeding on C. oleifera trees have seldom been concerned. The pest insects of C. oleifera and their natural enemies captured by ultra violet light in Quzhou were surveyed in the present paper, and diversity and population dynamics of the insects collected were analyzed. The results showed that 103 pest insects belonging to 6 orders, 33 families, 81 genus were found. 41521 individuals were trapped during 2012-2013, and the leaf defoliators were predominant. The seasonal dynamics of pest insect populations were influ- enced by the climate conditions, the growth stages of C. oleifera trees, and fruit picking. The peak period of the pest activities was from May to September, and April and October were just two transitional periods when the pests and natural enemies switched from overwintering to activity and from activity to overwintering, respectively. Natural enemies were also attracted by ultra vio- let light trap, and 983 individuals in 21 species were trapped in the two years. These results may provide a theoretical basis for the integrated pest management of C. oleifera.