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Understanding Pearl Millet Blast Caused by Magnaporthe grisea and Strategies for Its Management

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Blast Disease of Cereal Crops

Part of the book series: Fungal Biology ((FUNGBIO))

Abstract

Pearl millet blast, caused by Magnaporthe grisea, has emerged at an alarming rate in the recent past in India, and causes potential loss in both forage and grain production. The commercialization of blast-susceptible hybrids, and conducive environmental conditions, has led to the widespread occurrence of the disease across pearl millet-producing areas. The disease is characterized by water-soaked lesions with grayish center on foliar parts which later turn into brown lesion surrounded by chlorotic halo. The disease is mostly favored under warm and humid conditions of Rajasthan, Gujarat, Maharashtra, Madhya Pradesh, Uttar Pradesh, and Haryana where incidence of the disease is noticed up to 90%. The heterothallic nature of M. grisea/oryzae ensures high level of pathogenic variations in the natural populations of the pathogen. The disease can be effectively managed through host plant resistance and use of fungicides, and by integration of cultural practices, host plant resistance, need-based chemical application, biological control, and use of botanicals. This chapter describes symptoms, host range, current status, variability in the pathogen, mechanism of pathogenicity and epidemiology of pearl millet blast, and available options for the disease management.

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Authors and Affiliations

  1. ICAR Research Complex for NEH Region, Sikkim Center, Tadong, Gangtok, India

    Shweta Singh & Chandramani Raj

  2. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, India

    Rajan Sharma

  3. Pearl Millet Pathology Laboratory, DOS in Biotechnology, University of Mysore, Manasagangotri, Mysore, India

    S. Chandra Nayaka

  4. ICAR-AICRP on Pearl Millet, Jodhpur, Rajasthan, India

    C. Tara Satyavathi

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  1. Shweta Singh
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  2. Rajan Sharma
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  3. S. Chandra Nayaka
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  4. C. Tara Satyavathi
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  5. Chandramani Raj
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Correspondence to Rajan Sharma .

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Editors and Affiliations

  1. Pearl Millet Pathology Laboratory DOS in Biotechnology, University of Mysore, Manasagangotri, Mysore, India

    S. Chandra Nayaka

  2. ICAR-VPKAS, Crop Protection Division, Almora, Uttarakhand, India

    Rajashekara Hosahatti

  3. Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi, India

    Ganesan Prakash

  4. ICAR-AICRP on Pearl Millet, Jodhpur, Rajasthan, India

    C. Tara Satyavathi

  5. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana, India

    Rajan Sharma

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Singh, S., Sharma, R., Chandra Nayaka, S., Tara Satyavathi, C., Raj, C. (2021). Understanding Pearl Millet Blast Caused by Magnaporthe grisea and Strategies for Its Management. In: Nayaka, S.C., Hosahatti, R., Prakash, G., Satyavathi, C.T., Sharma, R. (eds) Blast Disease of Cereal Crops. Fungal Biology. Springer, Cham. https://doi.org/10.1007/978-3-030-60585-8_11

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