生物杀菌剂“松刚霉素”对枯萎病病原菌抑制作用的研究

STUDY ON INHIBITION ABILITY OF BIOCIDE "SONGGANGMEISU" TO FUSARIUM OXYSPORUM

生物杀菌剂“松刚霉素”是利用生物藕合技术 ,对灰黄霉素进行化学修饰后产生的一种新的物质 ,它具有灰黄霉素的全部优点 ,如对真菌具有很强的抑制能力 ,对人畜无毒、无害的优点 ,同时增强了水溶性 ,扩大了抑菌谱。本试验通过抑菌率和抑菌圈法进行测定的结果都表明 :松刚霉素对甜瓜枯萎病病原尖孢镰刀菌和豇豆枯萎病原尖孢镰刀菌的生长都有明显的抑制作用 ,抑制作用随着浓度的增大而提高。同时 ,松刚霉素对甜瓜尖孢镰刀菌的菌丝生长和菌落形态有明显的影响 ,并影响着其胞外物质的分泌。

Biocide 'Songgangmeisu” is novel material produced by chemical modification of griseofulvin using bioconjugate technique. It not only contains all advantages of griseofulvin with high inhibition ability to fungi and harmless to human being and animals, but also has higher water-solubility and larger host spectrum than griseofulvin. Results of inhibition ratio and inhibition ring tests showed that 'Songgangmeisu” had distinct inhibition ability to growths of Fusarium oxysporum strains collected from melon and cowpea, and the ability enhanced as the concentration increasing. Meanwhile, 'Songgangmeisu” interfere obviously on mycelial growth and clone shape, and also change excrete of extracellular substance.