蠋蝽对桃蛀螟幼虫捕食功能反应

Predatory Functional Response of Arma chinensis to the Larvae of Conogethes punctiferalis

为明确蠋蝽(Arma chinensis)对桃蛀螟(Conogethes punctiferalis)幼虫的生物防控潜能,在室内条件下测定蠋蝽5龄若虫、雌成虫和雄成虫对桃蛀螟3龄、5龄幼虫的捕食能力。结果显示:蠋蝽5龄若虫、雌成虫和雄成虫对不同龄期桃蛀螟幼虫的捕食功能反应均符合HollingⅡ模型。蠋蝽对桃蛀螟3龄、5龄幼虫的控害能力由强到弱的排序均为:雌成虫,雄成虫,5龄若虫;随着猎物密度的增加,蠋蝽对桃蛀螟3龄、5龄幼虫的搜寻效应均逐渐降低,雌成虫的搜寻效应大于5龄若虫和雄成虫。蠋蝽5龄若虫、雌雄成虫均对桃蛀螟具有较好的控害潜能,且蠋蝽雌成虫的控害潜能大于雄成虫和5龄若虫。

The predation ability of the 5th instar nymph,female and male adults of A.chinensis against the 3rd and 5th instar larvae of C.punctiferalis was measured under indoor conditions to clarify the biological control potential of A.chinensis against the larvae of C.punctiferalis.The results showed that predation functional responses of the 5th instar nymphs,male and female adults of A.Chinensis to C.punctiferalis at different ages all conformed to the Holling II model.The control ability(a/Th)of the 5th instar nymph,male and female adults of A.Chinensis to the 3rd and 5th instar larvae of C.punctiferalis was as follows in descending order:female adults of A.Chinensis,male adults of A.chinensis,the 5th instar nymph of A.Chinensis.As the density of the 3rd and 5th instar larvae of C.punctiferalis increased,the search effect of A.Chinensis gradually decreased,and the search effect of female adult was greater than that of the 5th instar nymph and male adult.The 5th instar nymph,male and female adults of A.chinensis had good control potential against C.punctiferalis,and the control potential of female adult of A.chinensis was greater than that of male adult and the 5th instar nymph.