IN VITRO STUDY OF NEW GENERATION CHEMICALS AGAINST Rhizoctonia solani Kuhn CAUSING SHEATH BLIGHT OF RICE

ASHAJYOTHI MUSHINENI¹*, SURAJIT KHALKO², SUKRAM THAPA^3
1Department of Plant Pathology, ICAR- Indian Agricultural Research Institute, New Delhi, 110012, India
²Department of Plant Pathology, Uttar Banga Krishi Viswavidyalaya, Cooch Behar, West Bengal 736165, India
³Department of Plant Pathology, Bidhan Chandra Krishiviswavidyalaya, Mohanpur, Nadia, West Bengal 741252, India
* Corresponding Author : aashjyo18@gmail.com

Received : 07-04-2017     Accepted : 10-04-2017     Published : 24-04-2017
Volume : 9     Issue : 19       Pages : 4201 - 4203
Int J Agr Sci 9.19 (2017):4201-4203

Keywords : Fungicides, In vitro, Sheath blight, Rhizoctonia, Management
Academic Editor : Sudhanshu Jain
Conflict of Interest : None declared
Acknowledgements/Funding : Department of Plant Pathology, Uttar Banga Krishi Viswavidyala, Cooch Behar, West Bengal 736165
Author Contribution : All authors equally contributed

Rice (Oryza sativa L.) is the world’s second most important cereal crop and is becoming a model plant for cereals. It is the staple food crop for Asian countries, supplying nearly 23% of the per capita energy for six billion people worldwide. Sheath blight of rice caused by Rhizoctonia solani Kuhn is a serious threat in all rice growing countries of the world. This disease is distributed in almost all the rice growing states of India. The disease is alarming due to its intensive cultivation of modern high yielding varieties of Rice with high doses of nitrogenous fertilizers. Though the resistant varieties are the best method of management, as the major gene (s) for resistance not yet found and resistance is majorly governed by polygenes, still management of this disease is depended upon the chemicals. This study includes the In-vitro evaluation of seven new generation chemical compounds which includes mainly strobilurins and triazols for testing their efficacy against Sheath blight disease. In In-vitro study 4 fungicides screened at 5 different concentrations (10,20,40,80,160ppm) and 2 were at 0.5,1,2,4,8ppm concentrations by using poisoned food technique. Among them Tebuconazole 50% + Trifloxystrobin25%WG gave the lowest ED50 value (0.0054g/L) followed by the Hexaconazole5%SC (0.005ml/L) and Propiconazole25%EC (0.011ml/L).

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