1Department of Climate Change and Agricultural Meteorology, Punjab Agricultural University, Ludhiana-141 004
2Department of Plant Breeding & Genetics, Punjab Agricultural University, Ludhiana-141 004
Department of Plant Pathology, Punjab Agricultural University, Ludhiana-141 004
*E-mail: kashyaps@pau.edu
Online published on 24 August, 2018.
The investigations were carried out to study the relationship between development and progress of stripe rust (Puccinia striiformis f. sp. tritici) with different weather parameters during crop seasons 2010–11, 2011–12 and 2012–13. The Incubation period of pathogen varied from 10–17 days, 11–21 days and 9–19 days and latent period varied from 10–23 days, 11–21 days and 11–22 days in different months during 2010–11, 2011–12 and 2012–13 respectively. Correlation coefficients indicated that maximum and minimum temperature, morning and evening relative humidity, rainfall and sunshine hours influence the disease development and progress. Significant R2 values were observed when number of weather parameters were involved to develop a regression model for stripe rust forewarning. Step wise regression analysis indicated that temperature and relative humidity can be used as key indicators for yellow rust prediction. Generally disease progress was found to be slow during December, January and fast during February under field conditions.
Wheat, stripe rust, weather parameters, incubation period, latent period, diseases severity
