摘要
目的 研究赤桉提取物 (Ec M2 )与氯硝柳胺及其可湿性粉剂的联合杀螺作用。 方法 采用浸杀法 ,将不同浓度的氯硝柳胺、氯硝柳胺可湿性粉剂分别同不同浓度的 Ec M2溶液复配 ;并将氯硝柳胺与 Ec M2、氯硝柳胺可湿性粉剂与Ec M2按不同比例混合 ,在 (2 5± 1)℃恒温条件下浸泡钉螺 48h和 72 h,观察钉螺死亡情况。 结果 氯硝柳胺与 10mg/L Ec M2配伍后 ,其对钉螺 72 h的 L C5 0 由单用时的 0 .11mg/L降低为 0 .0 2 36 mg/L,增效比为 4.7倍 ;而同 Ec M2按 1∶ 10 0和 1∶ 2 0 0的比例混合后 ,两药的共毒系数 (CTC)为 16 2 .9和 15 7.2。氯硝柳胺可湿性粉剂与 10 mg/L Ec M2配伍后 ,其对钉螺 48h的 L C5 0 由单用的 0 .19mg/L 降低为 0 .0 74mg/L,增效比为 2 .5 6倍 ;而同 Ec M2按 1∶ 2 5和 1∶5 0的比例混合后 ,两药的共毒系数 (CTC)为 12 0 .8和 132 .3。共毒系数均超过了 10 0。 结论 Ec M2同氯硝柳胺、氯硝柳胺可湿性粉剂配伍混合后 。
Objective To study the molluscicidal effect of Eucalyptus camaldulensis (EcM2) combined with niclosamide and niclosamide ethanolamine salt wettable powder. Methods The immersion method was taken. Niclosamide and niclosamide ethanolamine salt wettable powder of different concentration were combined with different concentrations EcM2 solution respectively, and were mixed with EcM2 in different proportion respectively. The snails were immersed at the condition of constant temperature 25±1℃ for 48 hours and 72 hours and then to observe the death of snails. Results The LC 50 of 72 hours decreased from 0.11 mg/L of single using the niclosamide to 0.0236 mg/L combined with 10 mg/L EcM2. The synergism ratio is 4.7 times. The cotoxicity coefficient (CTC) of niclosamide combined with EcM2 in the proportion of 1∶100 and 1∶200 is 162.9 and 157.2 respectively. The LC 50 of 48 hours decreased from 0.19 mg/L of single using the niclosamide ethanolamine salt wettable powder to 0.074 mg/L combined with 10 mg/L EcM2. The synergism ratio is 2.56 times. The CTC of niclosamide ethanolamine salt wettable powder combined with EcM2 in the proportion of 1∶25 and 1∶50 is 120.8 and 132.3 respectively .The CTC of all above is over 100. Conclusion The EcM2 extracted from E. camaldulensis combined with niclosamide and niclosamide ethanolamine salt wettable powder has a strong molluscicidal effect.
出处
《中国寄生虫病防治杂志》
CSCD
2001年第1期41-43,共3页
Chinese Journal of Parasitic Disease Control
关键词
赤桉
植物杀螺剂
氯硝柳胺
联合作用
Eucalyptus camaldulensis
plant molluscicide
niclosamide
synergism combined
