IN VITRO STUDY OF NEW GENERATION CHEMICALS AGAINST Rhizoctonia solani Kuhn CAUSING SHEATH BLIGHT OF RICE
Journal Title: International Journal of Agriculture Sciences - Year 2017, Vol 9, Issue 19
Abstract
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).
Authors and Affiliations
ASHAJYOTHI MUSHINENI, SURAJIT KHALKO, SUKRAM THAPA
Keywords
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