Acta Scientific Agriculture (ASAG)(ISSN: 2581-365X)

Research Article Volume 5 Issue 8

Status of Groundnut Early Leaf Spot (Cercospora arachidicola) at Hot Semi-arid Ecoregion of Gujarat (India): Past, Present and Future

Thirumalaisamy PP1, M Narayana Bhat2, Shabistana Nisar2, Satish Kumar Yadav2, Puran Chandra2 and Sengottaiyan Vennila2*

1ICAR-National Bureau of Plant Genetic Resources, Regional Station, Thrissur, Kerala, India
2ICAR-National Research Centre for Integrated Pest Management, L.B.S. Building, IARI, New Delhi, India

*Corresponding Author: Sengottaiyan Vennila, ICAR-National Bureau of Plant Genetic Resources, Regional Station, Thrissur, Kerala, India.

Received: June 25, 2021; Published: July 29, 2021

Abstract

Status of early leaf spot (Cercospora arachidicola) of groundnut over six kharif seasons (2011 - 2016) at hot semi-arid region of Junagadh (Gujarat) was analysed in relation to climatic change and validated using 2020 in addition to its prediction for the future periods of 2050 and 2080. Variability existed for the initiation and mean seasonal status of early leaf spot across seasons. While the earliest occurrence was four weeks after sowing (WAS) during 2012, disease severity was found to increase with increase in crop age despite variations in rate of disease progressions. Terminal disease severity in respect of 2014 and 2011 was 61.5 and 53.3% and less than 40% during other study seasons. Mean severity was the highest (43.7%) and lowest (20%) in 2011 and 2015, respectively with 27.3% during 2020. Climatic deviations worked out in comparison with long term average (40 years; 1970 - 2010) for the period of 2011-16 had shown a significant increase of maximum temperature and rainfall by 0.63°C and 12.4 mm/week, respectively. Impact of climatic deviations and their relations to severity worked out using Kendall correlations revealed significant influence of increased rainfall increasing severity of early leaf spot during the past and future periods implying that the changing climatic conditions would be conducive for higher early spot disease severity on groundnut.

Keywords: Climate Change; Cercospora arachidicola; Early Leaf Spot; Groundnut; Gujarat

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Citation

Citation: Sengottaiyan Vennila., et al. “Status of Groundnut Early Leaf Spot (Cercospora arachidicola) at Hot Semi-arid Ecoregion of Gujarat (India): Past, Present and Future". Acta Scientific Agriculture 5.8 (2021): 48-52

Copyright

Copyright: © 2021 Sengottaiyan Vennila., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.




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