摘要
本文报导了应用斯氏线虫属（Ｓｔｅｉｅｒｎｅｍａｓｐｐ．）８个品系室内外控制木麻黄皮暗斑螟的试验结果。通过对８个线虫品系在不同温度下对皮暗斑螟的侵染力测定，筛选出ＳｔｅｉｎｅｒｎｅｍａｆｅｌｔｉａｅＡｇｒｉｏｔｏｓ及Ｓｔｅｉｎｅｒｎｅｍａｆｅｌｔｉａｅ，Ｂｅｉｊｉｎｇ为最佳品系，能寄生低、中、高龄幼虫及蛹，３一４天幼虫死亡率达１００％；温度２０～３０℃不影响线虫对寄主的致死效果，只是致死速度不同，在２５℃时侵染力最强；以１００条侵染期线虫／害虫为最适剂量。林间以２００条线虫／ｍｌ的ＳｔｅｉｎｅｒｎｅｍａｆｅｌｔｉａｅＡｇｒｉｏｔｏｓ及Ｓｔｅｉｎｅｒｎｅａｍａ．ｆｅｌｔｉａｅ，Ｂｅｉｊｉｎｇ两品系线虫液喷洒虫巢，皮暗斑螟幼虫的平均致死率分别为７２．０％、６９．９％。
Casuarina tree,a main tree species in Fujian Province in sandwind break,isinfested by Euzop h era bataug ensis Caradja The results show that Stpinernema feiltae , anentomopathogenic nematode,is an effective parasite to suppress the population of Eltzop herapest.T he comparison of infective of 8 steinernematid strains indicates that Steinernemafeltiae,Agriotos and Steinerinema feltiae,Beijing are the best strains.The Euzop hera larvae,young and mature,and pupae are all well infected by both Agriotos and Beijing strains ofSteinernema feltiae, and 100% Euzophera larvae die within 72一96 hours,The temperatureran8e from 20-30℃ has effect on the killing speed but not on mortality of Euzopherainfected by nemotades. The quickest killing speed is gained at 25℃, No different mortalityhappens wlien the dosage of nematode is above 100 juveniles per ml.72.0%and 69.9%Euzophera larvae die under the dosage of 200 nematode juveniles per ml of Agriotos andBeijing strains of Steinernema feltiae respectively。
出处
《华东昆虫学报》
1995年第1期65-70,共6页
Entomological Journal of East China
关键词
斯氏线虫
皮暗斑螟
控制能力
侵染力
喷洒防浩
Steinernema spp,Euaophera batangensis,infectivity,control by spray.
