Vol. 11, Issue 9 (2022)

Author(s):
RM Vijaya Ramakrishnan and Dr. Sobita Simon

Abstract:
A field experiment was conducted using Spent Mushroom Compost, Pseudomonas fluorescens and Microalgae at Central Research Field of SHUATS. Potato is prone to several deadly pathogens which disrupts the growth of the plant and cause severe economic loss by destroying the whole plant. Early Blight is one among the disease caused by a plant pathogenic fungi Alternaria solani, that can lead to heavy losses in the yield of potato. In order to study about mitigating the foliar damage caused by the pathogen through biological control method, an experiment was performed in SHUATS, Allahabad during 2021-2022 to evaluate the different doses of Pseudomonas fluorescens 1% and Microalgae viz. 1%, 2%, 3%, 4% and 5% along with Bavistin as treated checked against Early Blight of Potato. The result shows that P. fluorescens @ 1% + Microalgae @ 5% was superior over all treatments, recording the minimum disease intensity at 60, 75, 90 and 105 DAS (9.34%, 14.33%, 17.52% and 34.60%) over the control (untreated checked). Hence, the biocontrol agent Pseudomonas fluorescens and Microalgae can be used to direct Alternaria solani causing early blight of potato.