释放管氏肿腿蜂防治桃红颈天牛效果评价

Evaluation of biological control of Aromia bungii by releasing Sclerodermus guani in the peach orchard

桃红颈天牛Aromia bungii是严重危害桃树的蛀干害虫,管氏肿腿蜂Sclerodermus guani是防治天牛类蛀干害虫的主要天敌昆虫。2020年9月下旬在桃园释放管氏肿腿蜂防治桃红颈天牛低龄幼虫,以受害树受害级别和数量的变化作为检测指标,通过计算受害减退率判断管氏肿腿蜂是否适合作为桃红颈天牛的生防因子。结果表明,释放天敌的果园内桃树的受害程度有所下降,校正受害减退率达63.23%,而对照区果园内桃树的受害程度则有所上升。管氏肿腿蜂可以作为桃红颈天牛的生防因子。提出桃红颈天牛生物防治的评价方法和管氏肿腿蜂释放时机的建议。

Aromia bungii is a serious wood borer of peach tree.Sclerodermus guani is a main natural enemy of cerambycid wood borer.This paper reported releasing S.guani to control young larvae of A.bungii in peach orchard in late September 2020.Taking infested levels of peach trees and quantities changes as index to calculate the decrease rate of damage,we evaluated whether S.guani was a suitable biological control agent against A.bungii.The results showed that the damage degrees of peach tree decreased in the orchards after releasing S.guani,and the calibrated decrease rate of damaged trees reached to 63.23%,but increased in the control orchard.S.guani can be used as an effective biological agent against A.bungii.The suitable evaluation index of biological control against A.bungii and the time of release of S.guani in the A.bungii infested peach orchard were suggested.