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Forewarning Rice Blast in India

Forewarning Rice Blast in India

DRR Technical

DRR Technical Bulletin No. 9, 2004-2005 Correct Citation Reddy, C. S., K. Susheela, A. S. Kapoor, R. Kaundal, N. V. Krishnaiah, B. Mishra, Y. S. Ramakrishna, Y. G. Prasad, D. Yella Reddy and M. Prabhakar, 2004. Forewarning Rice Blast in India, Technical Bulletin No. 9, 2004-2005, Directorate of Rice Research, Rajendranagar, Hyderabad – 500030, A. P., India, 46 pp. Published by Dr. B. Mishra Project Director Directorate of Rice Research Rajendranagar Hyderabad - 500 030, India. Tel : +91-40-2401 5120, 2401 5036-39 Fax : +91-40-2401 5308 Web Site : http://www.drrindia.org E-mail : mishra.b@eudoramail.com Designed by Dr. K. Susheela Photographs by Dr. C.S. Reddy Printed by Suneetha Offset Printers # 4-5-716/3, Kuthbiguda, Koti, Hyderabad - 500 027. A.P., India. Ph : +91-40-24657269, 9391034092.

PREFACE Rice, the staple food crop in India, holds key to our country’s food security. It is grown in 44 million hectares with annual production of 90 million tons. To meet the growing demand and sustain our self sufficiency in food, we need to grow an additional 2 million tons of rice every year. To achieve this goal, the losses due to biotic and abiotic stresses have to be minimised. Among the biotic stresses, blast is one of the most destructive diseases and is widely prevalent in India. It is a major limiting factor in realizing the full yield potential of rice cultivars in plains and hilly areas of the country. Blast is endemic to several rice growing areas in the country due to favourable environment during the crop season. Weather has very important role to play in the appearance, multiplication and spread of blast pathogen. Though a lot of fragmented information is available on the blast disease and influence of weather on its development, no consolidated effort has been made so far, to bring these together to develop an ideal model for rice blast forewarning. Hence, the present study was aimed to develop database on climate and blast disease in different agro-ecological regions of India, to identify significant weather factors conducive for incidence, intensification and spread of pathogen and disease, and to generate / validate weather based forecasting models and operational forewarning systems for blast control. The results reported in this publication ‘Forewarning Rice Blast in India’, are generated through the National Agricultural Technology Project on ‘Development of Weather based Forewarning Systems for Crop Pests and Diseases’ undertaken at the Directorate of Rice Research, Hyderabad, CSK Himachal Pradesh Krishiviswavidyala, Palampur, and Central Research Institute for Dryland Agriculture, Hyderabad. It is expected that this publication will be useful to researchers, extension workers and farmers in understanding the blast disease and its relationship with weather, and adopting suitable disease management practices based on the forewarning models developed in the project. (B. MISHRA) Project Director

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