Vol. 11, Issue 8 (2022)

Author(s):
Jagdish Kumar Arora, Sachin Gupta, Ranbir Singh, Sandeep Chopra and Sneha Choudhary

Abstract:
Black scurf of potato caused by the pathogen Rhizoctonia solani Kuhn (Teleomorph Thanatephorus cucumeris Donk) affects the potato crop globally. The pathogen poses a possible threat to rapidly expanding seed potato cultivation in the north plain. In cool and wet soil, the diseases cause significantly more damage. Boric acid and pencycuron are the two chemicals that are frequently used by Indian farmers to control the black scurf of potato. New molecule: Fluxapyroxad 333 FS was evaluated at the different concentrations for bio-efficacy and phytotoxicity against black scurf of potato for two cropping seasons (2020-21). Pooled Results of two years showed that all the concentrations of 0.08%, 0.1% and 0.12% tested statistically effective in percent reduction of disease severity over control (90.77, 92.43 % and 92.43 % respectively) and percent increase in yield (12.12, 14.02 % and 14.60 % respectively). The plant emergence percentage ranged from 92.30-94.01 at tested concentrations of Fluxapyroxad 333 FS. No adverse effect on plant emergence and phytotoxicity was observed in any tested concentration. Conclusively as per looking at percent efficacy, environmental concern, and resistance risk factor, Fluxapyroxad 333 statistically even at a lower concentration (0.08%), advocated for potato growers for healthy crop.