PJB-2009-33
CHARACTERIZATION OF BIPOLARIS SOROKINIANA ISOLATED FROM DIFFERENT AGRO-ECOLOGICAL ZONES OF WHEAT PRODUCTION IN PAKISTAN
SHAHZAD ASAD, SHAMIM IFTIKHAR, ANJUM MUNIR AND IFTIKHAR AHMAD
Abstract
Bipolaris sorokiniana is a known cause of foliar blight, seedling blight, head blight and common root rot of wheat worldwide. It causes significant yield losses in South Asian countries and considered as a serious foliar disease constraints in warmer growing areas. The pathogen collected during 2004 and 2005 from foliar samples of wheat of different agro ecological zones was characterized on the basis of culture/colony colour and texture, conidial morphology and pathogenic nature. They were grouped in 4 classes having black, grayish black, brown and albino (whitish) colony color with profusely sporulated and suppressed type of growth to fluffy and less sporulated type. The conidial average size ranged from 38.3–65.8 µm x 12.3–25 µm with slightly curved, brown to olivaceous brown with 2–13 septa. Some isolates had relatively long and broad slender conidia, while some were uniformly straight and cylindrical and light brown in colour. All the isolates did not show difference in pathogenicity test by producing the symptoms on leaves but their reaction varied in terms of aggressiveness.
To Cite this article:
Download
