摘要
[目的]研究野西瓜苗不同溶剂萃取物对枸杞蚜虫的触杀活性。[方法]采用点滴法测定野西瓜苗乙醇提取物和石油醚、氯仿、乙酸乙酯、正丁醇及水等5种不同极性萃取物对枸杞蚜虫的触杀活性。[结果]95%乙醇提取物对枸杞蚜虫有较高的触杀活性,而且随着提取物浓度的增大和处理时间的延长,枸杞蚜虫的校正死亡率都在升高,浓度50.00g/L时,48h的校正死亡率达97.04%,毒力回归方程为y=1.7910x+3.7502,LC50=4.9867g/L。5种萃取物对枸杞蚜虫的杀虫活性顺序为氯仿>石油醚>乙酸乙酯>正丁醇>水,氯仿萃取物48h的校正死亡率97.04%。[结论]该研究结果对野西瓜苗的进一步研究开发以及将其开发成新型的植物源农药具有参考价值。
[Objective]The purpose was to study the insecticidal active of Hibiscus trionum L seedling extracts made with different solvent against wolfberry aphis.[Method]The drop method was used to determine the insecticidal activities of the ethanol extracts and 5 kinds of extracts made with the petroleum ether,chloroform,ethyl acetate,n-butanol,aqueous from H.trionum seedlings against wolfberry aphis.[Result]95% ethanol extract displayed the higher contact activity to wolfberry aphis and the corrected mortality of wolfberry aphids was increased with the increasing of the extract concn.and the extending of treating time.The corrected mortality after 48 h reached 97.04% when the ethanol extract was 50.00 g/L.The regression equation of virulence was y=1.791 0x＋3.750 2 and LC50 =4.986 7g/L.The insecticidal activities of 5 extracts against wolfberry aphids was in the order of chloroform petroleum ether ethyl acetate n-butanol water.The corrected mortality of chloroform extracts after 48h was 97.04%.[Conclusion]The study had the reference value for the further research on H.trionum seedlings and the its development of new botanical pesticides.
出处
《安徽农业科学》
CAS
北大核心
2010年第30期16918-16919,共2页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金资助项目(20565003)
宁夏自然科学基金资助项目(NZ0719)
关键词
野西瓜苗
枸杞蚜虫
触杀活性
Hibiscus trionum L
Wolfberry aphids
Insecticidal activity
