Evaluation of Fungicides Against Rhizoctonia bataticola (Taub) Butler Causing Dry Root Rot of Groundnut and Their Compatability with Trichoderma asperellum
Gurijala Sri Varshitha *
Department of Plant Pathology, S V Agricultural College, Tirupati-517 502, Angrau, A. P., India.
P. Arunasri
Department of Plant Pathology, S V Agricultural College, Tirupati-517 502, Angrau, A. P., India.
Hari Kishan Sudini
International Crop Research Institute for the Semi Arid Tropics, Hyderabad- 502324,Telangana, India.
Subramaniam Gopalakrishnan
International Crop Research Institute for the Semi Arid Tropics, Hyderabad- 502324,Telangana, India.
Pradeep Manyam
Department of Plant Pathology, S V Agricultural College, Tirupati-517 502, Angrau, A. P., India.
*Author to whom correspondence should be addressed.
Abstract
The efficacy of four systemic and combination fungicides, namely Carbendazim 12% + Mancozeb 63% WP, Tebuconazole 25% WG, Hexaconazole 4% + Zineb 68% WG, and Tebuconazole 50% + Trifloxystrobin 25% WG, against Rhizoctonia bataticola, the causal agent of dry root rot in groundnut was evaluated using the poison food technique. Among the tested fungicides, Hexaconazole 4% + Zineb 68% WG exhibited the highest efficacy, with 100% inhibition of mycelial growth at all concentrations tested. Tests of compatibility of these fungicides with Trichoderma asperellum revealed that Hexaconazole 4% + Zineb 68% WG caused 38.88% of growth inhibition in T. asperellum while the other fungicides tested were totally incompatible with100 percent inhibition.
Keywords: Dry root rot, Rhizoctonia bataticola, Trichoderma, Fungicides, poisoned food technique, compatibility