Prevalence of antagonistic fungi in cotton fields from Amravati region.

摘要

A study was conducted to investigate the rhizosphere fungi of cotton from Amravati region of Maharashtra state, India. Serial dilution method was adopted for the isolation of fungi from collected soil samples of cotton fields. The isolated fungi were identified and subcultured for further studies. The isolation of fungi was carried out from July to November 2003. A total 18 fungi were recorded from the rhizosphere of cotton fields. Four species of antagonistic fungi were reported: Aspergillus flavus, A. niger, Penicillium oxalicum and Trichoderma viride. Among these 4 antagonists, Aspergillus was predominant in cotton fields. All the 4 fungi were used for its antagonistic properties against pathogenic fungi of cotton crop, such as Alternaria alternata, Fusarium oxysporum, Drechslera tetramera [Cochliobolus spicifer], Myrothecium roridum and Colletotrichum gossypii.