Antifungal activity of local isolates of Beauveria bassiana (Balsamo) Vuillemin against Verticillium dahliae Kleb. causing wilt disease of cotton

Abstract Background Verticillium dahliae Kleb. is a soil-borne pathogen with broad host spectrum and causes yield losses in cotton cultivation worldwide. Beauveria bassiana an environmentally friendly entomopathogenic fungus (EPF) that has been recognized, used studied for many years. Results As control, all local of B. isolates inhibited mycelial growth the at different rates. The highest percentage inhibition against non-defoliating (PHCVd3 isolate) defoliating (PHCVd47 pathotypes was determined Bb18 (85.3; 81.7%) Bb1 (82.3; 77.5%) isolates, respectively, when applied 2 days ago. Isolates (80.6%) (77.8%) had percentages PHCVd3 isolate, (75.8%) isolate PHCVd47, EPF were same time. Conclusions showed hope both wilt disease caused by V. under vitro conditions. Especially, observed to induce higher rates, developed Petri dish before pathogen.