Fusarium wilt of chili (Capsicum annuum L.) is an important disease in Pakistan that causes significant yield losses. In
the present study, pathogenicity test was conducted using four strains of Fusarium oxysporum f.sp. capsici and ten chili
varieties. It revealed that strain B was the most pathogenic strain and variety sky red was the most susceptible while variety
Anchal was the most resistant against F. oxysporum strain B. Antifungal bioassays were conducted to find out antimycotic
effect of extracts of fruit, bark and leaves of Eucalyptus citriodora (Hook.) against F. oxysporum. Ten concentrations (0,
1.0, 1.5, 2.0, 2.5 and 5%) of methanolic extracts of each plant part were employed against the target pathogen. Leaf extract
imparted the maximum (up to 98%) and significant suppression in fungal growth while fruit and bark extracts proved less
effective exhibiting only 50–60% reduction in fungal mycelial growth. The work concludes that methanolic extract of leaves
of E. citriodora have potential to restrain the disastrous effects of the pathogenic fungus as the plant extracts of Eucalyptus
conferred about 85% disease control in chilli plants with significantly high intensity of defense related enzymes under
pathogenic stress.
Fusarium wilt of chili (Capsicum annuum L.) is an important disease in Pakistan that causes significant yield losses. Inthe present study, pathogenicity test was conducted using four strains of Fusarium oxysporum f.sp. capsici and ten chilivarieties. It revealed that strain B was the most pathogenic strain and variety sky red was the most susceptible while varietyAnchal was the most resistant against F. oxysporum strain B. Antifungal bioassays were conducted to find out antimycoticeffect of extracts of fruit, bark and leaves of Eucalyptus citriodora (Hook.) against F. oxysporum. Ten concentrations (0,1.0, 1.5, 2.0, 2.5 and 5%) of methanolic extracts of each plant part were employed against the target pathogen. Leaf extractimparted the maximum (up to 98%) and significant suppression in fungal growth while fruit and bark extracts proved lesseffective exhibiting only 50–60% reduction in fungal mycelial growth. The work concludes that methanolic extract of leavesof E. citriodora have potential to restrain the disastrous effects of the pathogenic fungus as the plant extracts of Eucalyptusconferred about 85% disease control in chilli plants with significantly high intensity of defense related enzymes underpathogenic stress.
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