Author(s):

Anshul Arya and KPS Kushwaha

Abstract: The present investigation is on the evaluation of chemicals to see their effect on the fungal pathogen Fusarium oxysporum f.sp. lentis, causing wilt disease of lentil crop. Fungal pathogen was evaluated in the laboratory by employing the Poisson Food Technology along with seed treatment to the lentil seeds was given for evaluation of the chemicals against the pathogen under in vivo conditions. Percent inhibition in the radial growth of mycelia of pathogen in the petri dish was used for evaluating the potential of chemicals in laboratory to manage pathogen growth and reduction in the disease incidence was recorded to see the effect of chemicals under field conditions. The eight chemicals namely Azoxystrobin, Propiconazole, Provax, Captaf, Carbendazim, Thiram, Raxil and Vitavax Power, were used against the pathogen. Among all the chemicals evaluated, Raxil was found most effective giving 100 percent mycelium inhibition in laboratory at 500ppm followed by 88.75 percent, Captaf (75%), Vitavax power (71%), Azoxystrobin (69.5%), Carbendazim (56.66%), Thiram (53.75%), Provax (37.5%) and control where no inhibiton of mycelium was observed. The seed treatment with the chemicals showed minimum disease incidence in case of Raxil treatment i.e.0.97 percent in the year 2016 and 0.87 percent in the year 2017, and the maximum disease incidence was recorded in case of seed control (9.23%). The present study concluded that there are several new chemicals those have the potential to manage the disease even in a lower concentrations.

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