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Pakistan Journal of Biological Sciences
Year: 2003  |  Volume: 6  |  Issue: 1  |  Page No.: 1 - 6

A Study on Fungi and Soil Born Diseases Associated with Rice-wheat Cropping System of Punjab Province of Pakistan

Shazia Iram, Iftikhar Ahmad and M. Ashraf    

Abstract: The root and foliar diseases caused by soil-borne fungi of rice were assessed in main rice-wheat cropping areas of Punjab at the heading stage of the rice crop. Disease severity scales 0-3 and 0-5 were used for root rot and foliar diseases, respectively. The highest mean disease intensity of root rot was 58.88 in Sialkot and lowest 42.21 in Narowal. In case of foliar diseases brown spot, bacterial blight and sheath blight were 100% prevalent in Gujranwala whereas bakanae was present in traces in all four districts of Punjab. In Sheikhupura, blast was highly prevalent (20%) while in Gujranwala and Sialkot, it was absent. Sheath rot was only present in Narowal (16.66%). The highest mean disease intensity of brown spot (40), bacterial blight (44.66) and sheath blight (20) was in Gujranwala. Bacterial blight and sheath blight in Sheikhupura was 8 and 0, respectively. The highest mean disease intensity of blast was 4 in Sheikhupura and absent in Gujranwala and Sialkot. From root, foliar and soil samples Fusarium spp., Nigrospora oryzae, Helminthosporium spp., Curvularia spp., Phytophthora megasperma, Aspergillus spp., Alternaria slternata and Trichocladium spp. were isolated.

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