In vitro Studies of Antifungal Effect of Some Plant Extracts Against Rhizoctonia solani (Kuhn) Infecting Rice (Sheath Blight) in Plain Chhattisgarh Agro-Climatic Zone of India.

The antifungal effect of 13 plant extracts viz., Aloe barbadensis, Cymbopogon citrates, Datura inoxia, Datura stramonium, Hibiscus rosa sinensis, Ipomea carnea, Nerium indica, Nyctanthes arbor tristis Parthenium hysterophorus, Pterocarpus santalinus,, Saraca asoca, Syzygium cumini, Vinca rosea, were evaluated by poisoned food technique under in-vitro condition against Rhizoctonia solani Kuhn, the causal organism of sheath blight of rice (Oryzae sativa). Among all the plants screened, most of the plants have recorded significant antifungal effect against Rhizoctonia solani. and only one plant namely, Saraca asoca have completely inhibited the growth of the pathogen. The effective concentration inhibiting the growth of mycelial formation of the pathogen by the plant extract was at 100% concentration. And it was also observed that the efficacy of mycelial formation was at varying degree depending upon the plant extract whereas no sclerotia was formed in most of the plant extract.