Author(s):

DB Kolhe, RA Chavan, RG Brahmankar, PA Sahane and RB Bade

Abstract: In vitro efficacy of plant extracts and chemicals against Rhizopus rot of sapota” was studied at the Department of Plant Pathology, college of Agriculture, Latur (VNMKV, Parbhani), M.S. during the year 2019-20. Market samples of soft rot of sapota showing typical coarse grey colour growth yielded the growth of Rhizopus stolonifer and proved pathogenic causing similar symptoms. All plant extracts viz., Ginger, Turmeric, Neem, Garlic, Nilgiri, Onion and Tulsi and chemicals viz., Boric acid, Calcium chloride, Sodium bicarbonate and Potassium chloride were found effective in inhibition of mycelial growth of Rhizopus stolonifer. Garlic rhizome extract gave maximum mycelial growth inhibition (86%) followed by Nilgiri oil (85.15%), Turmeric rhizome extract (79.37%), Onion bulb extract (67.18%) and Tulsi leaf extract (62.71%). Least mycelial inhibition was recorded with Neem leaf extract (54.60%) and Ginger rhizome extract (52.41%). Among chemicals, Calcium chloride and Boric acid at concentration 0.5, 1 & 2% were found most effective in inhibiting the mycelial growth of Rhizopus stolonifer, least inhibition was observed with Potassium chloride and Sodium bicarbonate.

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