摘要
梳角窃蠹(Ptilinus fuscus Geoffroy)在青海省东部对杨树房木的蛀损最高达78.43％,平均为36.67％;房屋平均蛀危年限为20.46±9.42年。青杨干材的抗弯强度(kg/cm^2)与其表面的蛀孔量(孔/200cm^2)呈幂函数曲线相关:?=559.9?^(-0.2042)。本种窃蠹2年1代。成虫主要发生于6月中、下旬至7月上、中旬;海拔每升高100米,发生期约推迟3.6天左右。成虫发生期喷洒80％敌敌畏200—400倍液4—5次,毒杀成虫有效。管氏肿腿蜂(Scleroderma guani Xiao和Wu)对潜藏在干材深层的窃蠹幼虫和蛹,有较高的寄生力。
The anobiid beetle Ptilinus fuscus Geoffroy is an important insect pest of poplar timber and causes severe damages to buildings in the eastern part of Qinghai Province. It was determined that the bending strength of poplar wood bears a regressive relation with the number of borer holes as =559.9 ×-0.2042 and the critical value of damage which marks a 50% reduction of the strength is about 28.8 holes per 200 cm2. The degree of damage to the wood may be divided into five grades according to the average number of holes per 200 cm2 as: holeless≤3≤9≤29 >29, It was observed that die beetle takes two years to complete its life cycle which may extend to the Urird year after infrstation. The adult hurtles may appear in each year and emerge from the middle June to the middle July, For chemical control (o spray on the wood with 80% DDVP in dilution of 1:200 to 1:400 is effective to kill the adults. For biological control the parasitoid Scleroderma guani Xiao ct Wu can be used to parasitize the larvae and pupae in the burrows within the poplar wood.
出处
《昆虫学报》
CAS
CSCD
北大核心
1989年第2期200-206,共7页
Acta Entomologica Sinica
关键词
梳角窃蠹
房木害虫
管氏肿腿蜂
Ptilinus fuscus Geofroy--timber borer--Scleroderma guani Xiao et Wu
