摘要
【目的】探明两种葱属植物中的6个含硫化合物及微胶囊对香蕉枯萎病菌的抑菌作用。【方法】通过界面聚合法,制备出包含S-甲基甲烷硫代磺酸的聚脲微胶囊悬浮剂,以进行室内和盆栽毒力试验。【结果】二甲基三硫和S-甲基甲烷硫代磺酸对病菌都有极强的抑制作用,相对抑制率均达到100%;二甲基二硫醚200μL和100μL处理对病菌的抑菌效果都达100%,其他抑菌率低于40%;不同剂量的化合物对病菌的抑菌效果有显著差异。S-甲基甲烷硫代磺酸微胶囊的囊壁起到了一定的缓释作用,且不同剂量的微胶囊持效期不同。盆栽试验中,微胶囊相对清水,有一定的防效;前期防效较S-甲基甲烷硫代磺酸原药差,后期则相反。【结论】葱属植物中存在对香蕉枯萎病菌有极强作用的含硫化合物;微胶囊有一定的缓释作用,能延长药物的持效期。
[Objective]The objective of the study is to elucidate the inhibitory effects of six sulfocompounds from two Alliums and their microcapsule on the Fusarium oxysporum f. sp. cubense indoor and outdoor. [Method]Microcapsule suspensions containing S-methyl methanethio-sulfonate were prepared by interfa cial polymerization. [Result]The results showed that Dimethyl trisulfide and S-methyl methanethio-sul fonate exhibited strong inhibition effects on the fungus, up to 100%. Dimethyl disulfide also showed the same inhibitory effects with 200 I^L and 100 ~L treatments, while the other treatments were all under 40%. The inhibition effects of compounds showed significant difference with different concentration. Mi- croeapsule of S-methyl methanethiosulfonate showed certain control-release effect, which was related to the concentration. Compared with water, microcapsules showed some control effects in the pot experiment. At the early stage, the control effects of microcapsules were weaker than that of S-methyl methanethio-sulfonate,but stronger at the late stage. [Conclusion]The studies suggested that there are some sulfocom pounds with strong effects on Fusarium oxysporum f. sp. cubense in two Allium and the microcapsule can extend the control effects.
出处
《果树学报》
CAS
CSCD
北大核心
2013年第6期1040-1046,共7页
Journal of Fruit Science
基金
广东省科技计划项目(2010A020507001-78)
仲恺农业工程学院自然基金项目(G3100001)
关键词
葱属植物
香蕉枯萎病菌
抑菌作用
微胶囊
A lliums
F. oxysporum f. sp. cubense
Antibacterial effect
Microcapsule
