Effect of meteorological parameters on Karnal bunt incidence in wheat under different agroclimatic zones of Punjab

Sarabjot Kaur Sandhu SARABJOT KAUR SANDHU,Anurag Attri ANURAG ATTRI,Ritu Bala RITU BALA

doi:10.54386/jam.v24i1.781

Sarabjot Kaur Sandhu SARABJOT KAUR SANDHU, Anurag Attri ANURAG ATTRI + Show 1 more

Open Access

https://doi.org/10.54386/jam.v24i1.781

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Abstract

To quantify the effect of meteorological parameters on incidence of Karnal bunt in wheat crop, an investigation was done using 9 to 12 season’s data of Bathinda and Ludhiana stations of Punjab. Maximum temperature during March in range of 25-31oC, minimum temperature of February (8.5-11.0oC), morning and evening relative humidity of March in range of 85-95 and 40-60 per cent respectively, rainfall more than 25 mm with sunshine hours 5.5-9.0 hrs/day during mid February to mid March favour Karnal bunt in wheat crop. Maximum temperature of March showed significant negative correlation with incidence of Karnal bunt whereas minimum temperature of February showed significant positive correlation with disease incidence at both locations. Morning and evening relative humidity showed significant positive correlation with disease incidence. Rain amount and rainy days during mid February to mid March significantly influenced disease incidence. Sunshine hours had negative correlation with disease incidence. Backward multiple linear regression (BMLR) analysis indicated maximum temperature, rainfall and sunshine hours play significant role in Karnal bunt incidence at Ludhiana. However, at Bathinda, maximum temperature, evening time relative humidity, rain amount and rainy days played significant role.

Highlights

To quantify the effect of meteorological parameters on incidence of Karnal bunt in wheat crop, an investigation was done using 9 to 12 season’s data of Bathinda and Ludhiana stations of Punjab
Weather parameters viz. rainfall, maximum temperature, evening relative humidity, sunshine hours and number of rainy days are important for outbreak and spread of the disease (Singh et al, 2010)
The data of Karnal bunt incidence of 12 seasons i.e. from 2009-10 to 2020-21 of Ludhiana district and of 9 seasons i.e. from 2010-11 to 2018-19 of Bathinda district were obtained from the Wheat Section, Department of Plant Breeding and Genetics, PAU, Ludhiana

Summary

Introduction

To quantify the effect of meteorological parameters on incidence of Karnal bunt in wheat crop, an investigation was done using 9 to 12 season’s data of Bathinda and Ludhiana stations of Punjab. The meteorological data of different parameters were used for three critical time periods viz., February (I period), 15 Feb-15 March (II period) and March (III period) because during this period wheat is at anthesis and ear formation stages which are most vulnerable stages to Karnal bunt development under Punjab environmental conditions. Correlation coefficients were calculated between data of Karnal bunt disease incidence and different meteorological parameters viz., temperature, relative humidity, sunshine hours (for Ludhiana), rain amount and rainy days occurred during different critical periods assigned.

Results

Conclusion