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

Research Article Volume 6 Issue 3

Impact of Climate Variability on Groundnut Rust (Puccinia arachidis Speg.) at Hot Semi-Arid Region of Gujarat

M Narayana Bhat1, Thirumalaisamy PP2, Shabistana Nisar1, Puran Chandra1, Satish Kumar Yadav1 and S Vennila1*

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

*Corresponding Author: S Vennila, ICAR- National Research Centre for Integrated Pest Management, New Delhi, India.

Received: February 17, 2022; Published: February 24, 2022

Abstract

Severity of groundnut rust disease caused by pathogen Puccinia arachidis Speg was studied over eight kharif seasons between 2010 and 2020 at Junagadh located in hot semi-arid eco region under agro climatic zone of Gujarat plains and hills. Rust severity was measured on five cultivars (GG 20, GJG 22, TG 37A, TLG 45 and Western 66) grown during three sowing periods (May II fortnight, first and second fortnights of June). Climatic variability for the kharif period of groundnut cultivation was quantified for three climatic variables viz., temperature (maximum and minimum) and rainfall so as to relate to rust severity. The rust progressions in respect of seasons aggregated over cultivars and sowing time on calendar and crop age basis indicated varying duration and severity of the disease. Mean rust severity differed significantly across seasons, cultivars and sowing periods. The rust severity was significantly higher in 2011, GJG 22 and June (both first and second fortnight) sowings, respectively. Although the progression of rust severity varied on calendar as well as crop age basis amongst cultivars, the disease commencement in respect of sowing times was during 34th standard meteorological week (third week of August) coinciding with crop age of eight weeks. Magnitude climatic variability worked out for kharif of 2011-2020 over long term normals (40 years’ average) indicated a significant change in respect of maximum temperature (+ 0.7 °C) and rainfall (+16.9 mm/week). The significant impact of climatic variability on rust severity over seasons indicated positive and negative association of the unchanging minimum temperature and increasing rainfall, respectively. Climate variability impacts on rust severity brought out CJG 22 and TLG 45 as climate resilient cultivars, and sowing groundnut during second fortnight of May as an adaptive practice for recommendation to farmers under the current climate change scenario.

Keywords: Climate variability; Cultivar; Groundnut; Gujarat; Sowing period; Rust

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Citation

Citation: S Vennila., et al. "Impact of Climate Variability on Groundnut Rust (Puccinia arachidis Speg.) at Hot Semi-Arid Region of Gujarat". Acta Scientific Agriculture 6.3 (2022): 44-50.

Copyright

Copyright: © 2022 S 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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