戊唑醇和枯草芽孢杆菌协同作用防治蚕豆枯萎病及增效机理初探

Synergism between Tebuconazole and Bacillus subtilis against Faba Bean Fusarium Wilt and Mechanism of Increasing Effect

试验结果表明 :戊唑醇 (tebuconazole)和枯草芽孢杆菌 Bacillus subtilis生防菌株 B- 916协同作用 ,对抑制蚕豆枯萎病病原菌 Fusarium spp.菌丝生长和防治蚕豆枯萎病均有显著的增效作用。通过 B- 916利福平抗药性标记回收法测定了戊唑醇和 B- 916复配后 B- 916在土壤中的定殖状况 ,结果表明 :戊唑醇对 B- 916在土壤中定殖有促进作用 ,能减缓 B- 916群体数量大幅度下降 ,帮助B- 916发挥生物防治作用。这可能是戊唑醇和枯草芽孢杆菌 B-

The results of experiments showed that synergism between tebuconazole and the bio control strain of Bacillus subtilis B 916 possessed obvious increasing effects on the mycelia growth of Fusarium spp. and the disease development of faba bean Fusarium wilt. B 916 was marked with rifampicin and used for monitoring B 916 colonization in soil after cooperating. The results showed that tebuconazole can advance B 916 colonization in soil, weaken decline of B 916 quantity, and help showing of B 916 biological control. This was a part of the mechanism of increasing effect of synergism between tebuconazole and the bio control strain B 916.