In vitro Evaluation of Fungicides and Biocontrol Agents against Rhizoctonia solani in Tomato
M. Rajendraprasad *
Department of Plant Pathology, College of Agriculture, Professor Jayashankar Telangana State Agricultural University (PJTSAU), Hyderabad, India.
B. Vidyasagar
Department of Plant Pathology, College of Agriculture, Professor Jayashankar Telangana State Agricultural University (PJTSAU), Hyderabad, India.
G. Uma Devi
Department of Plant Pathology, College of Agriculture, Professor Jayashankar Telangana State Agricultural University (PJTSAU), Hyderabad, India
S. R. Koteswar Rao
Department of Plant Pathology, College of Agriculture, Professor Jayashankar Telangana State Agricultural University (PJTSAU), Hyderabad, India.
*Author to whom correspondence should be addressed.
Abstract
Twenty four fungal biocontrol agents and twelve bacterial biocontrol agents were screened for their efficacy against phytopathogenic fungi Rhizoctonia solani through dual culture technique. Trichoderma harzianum-1 and Pseudomonas fluorescence-2 were found effective in inhibition of mycelium (62.53, 62.20) of Rhizoctonia solani under in vitro conditions. Ten fungicides were tested for their efficacy against Rhizoctonia solani through poisoned food technique and the ten fungicides Tebuconazole + Trifloxystrobin, Propiconazole, Captan + Hexaconazole and Carbendazim were record 100 per cent at recommended and half the recommended dosage under in vitro condition.
Keywords: Rhizoctonia solani, Trichoderma harzianum, Pseudomonas fluorescence, dual culture technique, poisoned food technique and tomato