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本文研究了日本方头甲的种群动态、捕食习性、功能反应、干扰反应与农药毒性 .结果表明 ,日本方头甲在福安社口茶园一年有 4个发生高峰 ,与茶椰圆蚧二龄若虫的发生期跟随现象明显 ,对第二代茶椰圆蚧控制作用强。成虫和幼虫均可捕食各个虫态的茶椰圆蚧 ,成虫捕食具有日节律 ;雌成虫的捕食量大于雄成虫 ,雌、雄成虫捕食茶椰圆蚧的功能反应均为 Holling 型反应。雌成虫在 10℃下捕食率最低 ,15℃次之 ,35℃最高 ,在10 - 35℃内捕食率 y与温度 x的关系为 y=- 0 .4 36 2 +0 .2 84 6 x,在 35- 4 0℃内 y=38.84 74 - 0 .8579x;捕食者个体相互间存在干扰 ,雌雄混合组合干扰系数 m值最大 ;农药对幼虫的毒性大于成虫
In this paper, the population dynamics, predation habits, functional responses, interference responses and pesticide toxicity of S.aurusta were studied.The results showed that A. crassicarpa peaked 4 times a year in Fuchanshekou tea plantation, The occurrence of nymphs followed the phenomenon is obvious, the control of the second generation of tea coccids keratosis strong. Both adult and larvae could prey on various stages of T. catechu. Adult prey had a daily rhythm. The predation of female adults was greater than that of male adults. The female and male adults preyed on P. coccocco by Holling reaction. The predation rate of female adults at 10 ℃ was the lowest, followed by 15 ℃ and highest at 35 ℃. The relationship between predation rate y and temperature x at 10 - 35 ℃ was y = - 0.436 2 +0.284 6 x, In the range of 35-40 ℃, y = 38.84 74-0.88579x. There was interference between predators, and the interference coefficient m between male and female was the largest. The toxicity of pesticides to larvae was greater than that of adults