Effect of anti-T. harzianum on the inhibition of cotton root rot fungi

Abstract

This study was carried out in the laboratory of the Faculty of Education Zanzibar / Abyan to study the effect of antifungal efficiency of Trichoderma harzianum on cotton root rot disease caused by three fungi isolated from infected cotton roots، R. Solani، F. oxysporium، M. phaseolina، bio-resistor T. harzianum proved to be highly significant inhibition of growth of laboratory pathogenic fungi. The results of the experiments showed that there were significant differences at the level of 0. 05 between the treatment of the disc methods and the control. The results of statistical analysis indicated that the treatment of F. oxysporium was significantly higher compared to other treatments. The growth rate of F. oxysporium colony was 11. 02 mm، with an inhibition rate of 87. 76% compared to other treatments. Followed by M. phaseolina fungus، whose growth rate of colony diameter was 23. 14 mm، with an inhibition rate of 74. 29%. The growth rate of R. solani colony mushroom diameter was 51. 08 mm، and the inhibition rate was 43. 7%. .