Variability in Fusarium oxysporum f. sp. cumini causing Cumin Wilt

A total six isolates of Fusarium oxysporum f. sp. cumini, isolated from different cumin growing areas of Rajasthan, had cultural and morphological variability on different agar and broth media. Significant variation in mycelial growth and conidia formation was observed on different media. Maximum mycelial growth (8.16 cm) and conidia formation was observed on Czapek Dox agar followed by PDA. Highest fungal biomass (246.87 mg) was observed with Czapek Dox broth followed by PDB (233.66 mg). Pathogenic variability was also observed among the isolates. Isolate A₃ was found moist virulent showing 8.0% wilt incidence on 4^th day of inoculation followed by isolate A₅. Isolate A₂ was found least virulent as wilting appeared on 9^th day of inoculation.