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

References

1. Agricultural statistics at a glance 2019. Government of India. Ministry of Agriculture and Farmers Welfare, Department of Agriculture Cooperation and Farmers Welfare, Directorate of Economics and Statistics. (2019): 315.
2. Jha A., et al. “Effect of biopesticides and fungicides on tikka disease of groundnut (Arachis hypogaea)”. International Journal of Plant Protection 6.2 (2013): 425-427.
3. Thakur SB., et al. “Variability in groundnut (Arachis hypogaea) to Cercospora leaf spot disease tolerance”. International Journal of Life Sciences Biotechnology and Pharma Research 2 (2013): 254-262.
4. Varshney RK., et al. “Accelerating genetic gains in legumes for the development of prosperous smallholder agriculture: integrating genomics, phenotyping, systems modelling and agronomy”. Journal of Experimental Botany13 (2018): 3293-3312.
5. Patel HR., et al. “Impact of projected climate change on groundnut in Gujarat”. Journal of Agro Meteorology 1 (2013): 41-44.
6. Subrahmanyam P., et al. “Screening methods and sources of resistance to rust and late leaf spot of groundnut”. Information Bulletin no. 47. International Crops Research Institute for the Semi-Arid Tropics, Patancheru, Andhra Pradesh, India (1995).
7. Vennila S., et al. “Effect of climatic variability and weather factors on development of tomato early blight in a hot semi-arid region of Southern India”. Indian Journal of Horticulture 2 (2020a): 333-338.
8. Dey U., et al. “Role of weather factors in development of late leaf spot (Phaeoisariopsis personata) on groundnut (Arachis hypogaea)”. Mausam2 (2017): 299-308.
9. Pandey KK and Pandey PK. “Survey and surveillance of vegetable growing area for prevalence of major diseases”. Journal of Vegetation Science 2 (2003): 128-134.
10. Pandey KK., et al. “Resistance to early blight of tomato with respect to various parameters of disease epidemics”. Journal of General Plant Pathology6 (2003): 364-371.
11. Nash AF and Gardner RG. “Tomato early blight resistance in a breeding line derived from Lycopersicon hirsutum PI”. 126445 (1988).
12. Vennila S., et al. “Status of pod borer Helicoverpa armigera (Hübner) Pigeonpea and its association with climatic variations at a hot semi-arid eco-region of Southern India”. Annals of Plant Protection Sciences3 (2020b): 207-212.
13. Samui RP., et al. “Forewarning of incidence of tikka disease on groundnut and operational crop protection using weather information in Gujarat”. Mausam2 (2005): 425-432.
14. Ramaraj AP and Geethalakshmi V. “Analysing the uncertainty in climate projected by RCP 4.5 over Coimbatore”. Ecology, Environment and Conservation 20 (2014): 125-128.
15. Chaerani R and Voorrips RE. “Tomato early blight (Alternaria solani): the pathogen, genetics and breeding for resistance”. Journal of General Plant Pathology 6 (2006): 335-347.

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.