关键词: 万寿菊杀菌素;万寿菊粗提物；水乳剂;HLB值

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