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《Journal of Anhui Agricultural Sciences》 2008-23
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Insecticidal Activity of Oleander Extract to Pieris rapae

HE Heng-guo(College of Life Science,China West Normal University,Nanchong,Sichuan 637002)  
[Objective] The study was to provide the theoretical basis for further development and manufacturing new and high-efficienct insecticide.[Method] Oleander extract was obtained by using 95% alcohol to extract oleander leaves and 5 concn.of 640,320,160,80,40 mg/L were prepared to study the insecticidal activity to 2-3 instar Pieris rapae in lab.[Result]The oleander extract had certain toxic action to P.rapae.Within 96 h of stoping reaction,the corrected mortality of oleander extract with 40,80,160,320,640 mg/L to P.rapae was 21.74%,30.43%,34.78%,43.48%,86.96% resp.,showing the increasing tendency.The mortality of P.rapae increased with the prolonging time,and tended to be stable after 96 h,which indicated that oleander extract played its role in 96 h.The LC50 of oleander extract to P.rapae was 221 mg/L,and its LC95 was 3 676 mg/L.[Conclusion] The oleander extract had certain insecticidal activity and it could be exploited and utilized as botanical insecticide.
【Fund】: 四川省重点学科建设项目(SZD0420)资助
【CateGory Index】: S482.3
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