Abstract: Antagonists of Verticillium dahliae were screened by microsclerotia trap method from cotton fields with different damage level of Verticillium wilt. The inhibitory effect and colonization ability of the antagonists on the microsclerotia were tested. The results showed that the quantity of bacteria was different in different parts of microsclerotic and the quantity of antagonists varied according to different morbidity degree of Verticillium wilt in the cotton fields. The strain 424一31-6 which showed a good effect against germinating and growth of microsclerotia was obtamed. It could easily colonize on the surface and destroy the normal structure of microsclerotia. The stein 424一31-6 has biocontrol potential against V.dahliae.

Key words: V. dahlaae, Antagonistic bacteria, Microsclerotia, Colonization

CLC Number: 

• S562.034