Efficacy of Botanicals and Bioagents against Rhizoctonia solani Causing Wet Root Rot of Coriander
Subodh. U. Gaikwad *
Department of Plant Pathology, College of Agriculture, Latur, Maharashtra, India.
Praphulla. H. Ghante
Department of Plant Pathology, College of Agriculture, Parbhani, Maharashtra, India.
Sunita. J. Magar
Department of Plant Pathology, College of Agriculture, Latur, Maharashtra, India.
Ashwini. C. Kothare
Department of Plant Pathology, College of Agriculture, Latur, Maharashtra, India.
Ashish A. Devkar
Department of Plant Pathology, College of Agriculture, Latur, Maharashtra, India.
*Author to whom correspondence should be addressed.
Abstract
A laboratory study was conducted at Department of Plant Pathology, College of Agriculture, Latur, VNMKV, Parbhani, Maharashtra, India. during kharif/ Monsoon season of 2024-25 to study Wet root rot of coriander Caused by Rhizoctonia solani of Coriander. Here, in vitro efficacy of Botanicals & Bioagents were assessed against Rhizoctonia solani causing wet root rot of coriander. Among eight aqueous plant extracts, Garlic (Allium sativum) was found most effective, achieving 100 % mycelial inhibition at both 10 % and 20 % concentrations. Mehendi (Lawsonia inermis) and Tulsi (Ocimum tenuiflorum) followed with 77.21 % and 45.40 % inhibition at 10 % and 95.55 % and 100 % at 20 %, respectively. Aloe vera (Aloe barbadensis) and Neem (Azadirachta indica) showed less inhibition, indicating ineffectiveness against R. solani. Biological agents also exhibited promising results. Trichoderma harzianum showed the highest inhibition (92.77 %) with mycelial growth reduced to 24.00 mm, followed by Trichoderma hamatum (89.89 %) and Trichoderma asperellum (87.40 %). Moderate inhibition was recorded for Aspergillus flavus (52.07 %) and Aspergillus niger (31.29 %), while Pseudomonas fluorescens and Bacillus subtilis were least effective, with 15.45% and 8.30 % inhibition, respectively.
Keywords: Coriandrum sativum, Rhizoctonia solani, wet root rot, botanical extracts, bioagents