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1、II郎抗药性分析X市德国小嫌对常川杀虫剂的抗药性测定DeterminationoftheresistanceBlattellagemanicatocommonlyusedpesticidesinTianjinWANGWei,WUTong-yu,ZHANGYong-mei,LIPei-yun,HAOLian-yi,ZHANGJing.TianjinCenterforDiseaseControlandPrevention,Tianjin300011,ChinaAbstract：ObjectiveTodeterminethecurrentresistance
2、oftheGermancockroach,Blattellagermanica(L.)tocommonlyusedpesticidesinTianjin,providingtheevidenceforbettorcockroachescontrol.MethodsTheresidualfilmmethodrecommendedbyWHOwasappliedtomeasurethemedianknockdowntime(KT50)forGermancockroaches.BatchesofGermancockroachesarerespectivelye
3、xposedto5insecticideresidues(dichlorovos,acephate,propoxur,betacypermethrinandpermethrin)inglassjarsandobservedtodeterminetheirrateofknockdown.ResistanceratioswerecalculatedasRR50二KT50oftheteststrain4-KT50ofthesusceptiblestrain.ResuItsTheKT50forfield-collectedGermancockroachesin
4、Nankai,Jingnan,Hcxi,Tanggu,Dongli,Xiqing,andBeichenwere33.08mintoacephaterespectively,and40.91mintopropoxur,cockroachestodichlorovos,acephateKT50tobetacypermethrinforfield6.15,6.49,8.37,8.22,7.84,9.29and12.40mintodichlorovosrespectively,and74.2&65.36,29.52,30.23,30.67,58.64andan
5、d24.97,40.63,27.17,24.43,40.73,42.44respectively;theRR50oftestedGermanandpropoxurwerealllowerthan3・ThepopulationsinNankai,TangguandXiqingwore32.61,36.50and51.00minrespectively,withtheRR50rangingfrom6・48to10.71times;whilethevalueforJingnan,Ilexi,DongliandBeichenwereallgreaterthan
6、120.00min,withtheRR50greaterthan20.TheKT50topermethrinforfieldpopulationsinNankai,Jingnan,Hexi,DongliandBeichenwereallgreaterthan120.00min,withtheRR50greaterthan20;buttheKT50forXiqingstrainswas26.96min,withtheRR50lowerthan5,andthevaluesforTanggupopulationwas14.10min,withtheRR50l
7、owerthan3.ConclusionForGermancockroachescontrolinTianjin,theapplicationofbetacypermethrinandpermethrinshouldbereducedalongwithincreasedadministrationofcarbamates,suchaspropoxur,andorganophosphoruspesticidessuchasdichlorovosandacephate.徳国小!®(Blattellagemanica)对人类的危害主要是其体内外能携带多种病原
8、体，包括细菌、病毒、真菌、寄生虫，机械性传播多种疾病；还可以使人引起皮狀和呼吸道的过敏反应。由
