Inoculum levels of Fusarium oxysporum f. sp. ciceri isolates for wilt disease in chickpea
DOI:
https://doi.org/10.53550/jfl.v21i1.2002Keywords:
Fusarium oxysporum f. sp. Cicero, Pathogenicity, VirulenceAbstract
Fusarium oxysporum f.sp. ciceri 1 (Kanpur) isolate with 86.6% seedling mortality at 5% inoculum level was found virulent as compared to Foxysporum f.sp. ciceri 2 (Sehore) and F. oxysporum f.sp. ciceri 3 (Junagadh) isolates with 66.6 and 53.3% seedling mortality, respectively. Maximum wilt incidence at 5% inoculum level was observed with Foc 1 at 40 days after germination while with Foc 2 and Foe 3 it was observed at 43 and 45 days after germination. The increase in inoculum levels increased the wilt incidence. However, it was not proportionate with the increase in inoculum level. Maximum wilt incidence was observed with Foc 1 (86.6%), Foc 2 (93.3%) and Foc 3 (86.6%) at 25% inoculum level. In case of Foc 1 (Highly virulent), 15 and 20% inoculum levels did not cause increase in wilt incidence, while in Foc 2, 20% inoculum level and in Foc 3, 10 and 20% inoculum levels did not cause any increase in wilt incidence. These observations clearly indicated that for Fusarium oxysporum f.sp. ciceri isolates with different virulence levels, the amount of inoculum required may differ to obtain maximum wilting in chickpea.
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