Abstract:

As more attention was paid to environmental protection, the development and application of plant-source pesticides has become a hot spot. Tagetes fungicide was synthesized based on its root extract. Due to its water insoluble emulsification experiment was performed and emulsifying effects was found the best and its stability, the highest, when hydrophile-lipophite balance value (HLB value) of mixed emulsifier was 10. At the same time the stability is the highest. Tagetes Fungicide has good bacteriostasis effect on watermelon Fusarium, which is the same as crude extract from Tagetes roots. These results showed that the Tagetes Fungicide artificial synthesized have the same bacteria inhibition as natural fungicide.

Key words: Tagetes fungicide, crude extract of Tagetes, emulsion in water, HLB value

摘要：

随着人们环境保护意识的增强,植物源农药的开发利用是目前农药研究的热点课题,万寿菊杀菌素是模拟其根部提取物合成的杀菌物质,具有水不溶性,对其进行乳化实验,发现当复配乳化剂亲水亲油平衡值（HLB值）为10时乳化效果最好,此时制剂的稳定性最高。同时利用万寿菊杀菌素水乳剂对西瓜枯萎病菌进行抑菌实验效果良好,达到了与其根粗提物相近的抑制效果,表明该人工模拟合成的万寿菊杀菌素与天然杀菌素有相似的抑菌作用。

关键词: 万寿菊杀菌素;万寿菊粗提物；水乳剂;HLB值