Vol. 11, Special Issue 8 (2022)

Author(s):
Sachin Kumar, Ramji Singh, Khamal Khilari, DV Singh and Prashant Mishra

Abstract:
Stripe rust of wheat caused by Puccinia striiformis f. sp. tritici is a major constraint for wheat production worldwide. The present 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 2020-21 and 2021-22. The first appearance of disease was noticed at the end of 1st standard week of January during the year 2020-2021 with Disease Index of 0.15 Percent in contrast with the year 2021-2022, where first appearance of disease was noticed at second standard week of January with Disease Index 0.10 Percent. Disease progression varied significantly between these two cropping years where highest disease progression was noticed during 2020-2021 with maximum Disease Index of 42.5 percent and AUDPC (Area under disease progress curve) of 1263.25. On the other hand, a maximum Disease Index 37.5 percent was noticed during the year 2021-2022 with AUDPC 1154.3 (Fig 1, 2; Table-1). Correlation coefficients indicated that maximum and minimum temperature, morning and evening relative humidity, rainfall and sunshine hours influence the disease development and progress.