Correlation of Weather Parameters and Rust Disease Incidence in Cotton

摘要

The present studies were under taken in three seasons of kharif during 1998-99, 1999-2000 and 2000-2001 to study the influence of weather factors on the development of rust disease in cotton. During 1998-1999, 1999-2000 and 2000-2001 per cent disease,index (PDI) of rust varied from 1.6 to 25.6, 3.6 to 16.8 and 1.2 to 15.2 per cent, respectively. Results from the correlation revealed that all the weather factors were negatively correlated with the disease development in consecutive three years of theobservations. During 1998-1999, all the weather factors were significantly correlated whereas, maximum and minimum temperatures were non significantly correlated during 1999-2000 and in 2000-2001 all the weather factors except minimum temperature are non significantly correlated with disease development.