Vol. 10, Issue 9 (2021)

Author(s):
Abhishek Singh, VP Chaudhary, Subhash Chandra, Shiv Pratap Singh, Rahul Singh Raghuvanshi, Vivek Singh and Neeraj Kumar Rajvanshi

Abstract:
Web blight caused by Rhizoctonia solani (Kuhn) is one of the most important fungal diseases which appear every year in varying intensity and causes heavy reduction in yield. Though the web blight could be managed by the use of fungicide but due to the emergence of several problems like environmental pollution. Residual effect in grains, killing non targeted organisms its use should be discouraged. Hence, for minimizing the losses caused by web blight need in-expensive and environmentally safe management practices. Several botanicals and Bio-agents have been found effective against web blight of mungbean caused by Rhizoctonia solani. The botanicals were tested at different doses like 5.0, 7.5 and 10.0 per cent against web blight of Mungbean. Where 10.0 per cent concentration was found most effective which inhibited maximum per cent growth of fungus i.e. Garlic (82.53%) and followed by Ginger, Neem, Onion, Tulsi, Clerodendron and Sadabahar. However Per cent Inhibition in all treatments differed significantly to each other. The maximum per cent inhibition was obtained in 5.0, 7.5 and 10.0 per cent concentration in Garlic. Followed by Ginger after 48 hours of incubation. It was very clear from the studies that effectively of extracts increased with the increase in concentration and time of incubation. The per cent inhibition was also higher in T. viride (59.13, 68.47 and 71.78 per cent) and T. harzianum (49.35, 57.75 and 56.66 per cent) significantly inhibition the growth of R. solani as compared to control at 24, 36 and 48 hours of incubation. Trichoderma. viride was better in inhibiting radial growth of R. solani as compared to T. harzianum in vitro.