• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2019, Volume: 12, Issue: 7, Pages: 1-12

Original Article

Efficacy of Different Fungicides and Bio Control Agents Against Fusarium oxysporum, Causal Agent of Potato Dry Rot


Objectives: To study the prevalence of potato dry rot in different vegetables markets. To evaluate the effect of Fusarium oxysporum on potato. To study the efficacy of different antagonistic agents and fungicides against mycelia growth of F. oxysporum. Methods/Statistical Analysis: Survey was done from different vegetable markets of Pakistan. Potatoes showing dry rot symptoms were collected and brought to Plant Pathology laboratory. Findings: Antagonistic organisms cause highly significant inhibition in the growth of F. oxysporum which was higher than 60%. Lowest growth of F. oxysporum was found because of an interaction of P. varioti (15.5 mm) and Paecilomyces lilacinus (16.75 mm). Both them cause 82.39% and 80.96% inhibition in the growth of targeted pathogen respectively. Whereas in case of interaction with T. harzianum and Trichoderma polysporum the growth of F. oxysporum was 22.00 mm and 27.75 mm, which is still significantly low as compared to the growth of F. oxysporum 88.00 mm in separate control plates. The growth of pathogen was inhibited by Paecilomyces spp. and mutual inhibition of both antagonist and pathogen at few mm was observed. Whereas, in the case of Trichoderma spp. pathogen and antagonist produce intermingled growth, the growth of the F. oxysporum was ceased and overgrown by antagonist. In-vitro amendment of fungicide in culture media inhibits the colony growth of F. oxysporum. Reduction in colony diameter of F. oxysporum was observed with the application of used antagonistic fungi. Application/ Improvements: These results can be used in the analysis and bio-control methods of Potato dry rot.

Keywords: Bio-Control, Dry Rot, Fungicides, Fusarium oxysporum, Potato


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