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Pakistan Journal of Biological Sciences
Year: 2003  |  Volume: 6  |  Issue: 1  |  Page No.: 36 - 40

Prevalence, Incidence and Severity of Soil-borne Diseases and Fungi of Wheat in Rice-wheat Cropping System of Punjab Province of Pakistan During the Cropping Season 1999

Shazia Iram, M. Ashraf and Iftikhar Ahmad    

Abstract: A survey was conducted to monitor foliar and root diseases caused by soil-borne fungi at the booting stage of wheat crop in main rice-wheat cropping areas of Sheikhupura, Gujranwala, Sialkot and Narowal districts of Punjab. Foliar and root samples were collected from twenty-one key locations of four districts for the assessment of prevalence, incidence and severity of root rot and foliar spots. The highest mean incidence of root rot was 100% in Narowal and Sialkot whereas the lowest of 95% was in Gujranwala. The highest mean severity was 2.2 in Narowal while the lowest 1.5 was in Sialkot. Fusarium spp., Helminthosporium spp., Curvularia spp., Alternaria alternata, Macrophomona phaseolina, Coniothyrium spp., Mucor spp., Trichocladium spp., Rhizoctonia solani, Humicola spp. and Aspergillus spp. were isolated from the plants showing root rot symptoms. In Narowal and Sialkot the prevalence of foliar spots was 100% and in Sheikhupura 66.66%. The highest mean incidence 21.25% of foliar spots was in Sialkot and the lowest 15% was in Narowal. The highest mean severity was 4.5 in Sialkot and lowest of 3.5 in Sheikhupura. Alternaria alternata, Helminthosporium spp, Fusarium spp. and Chaetomium spp. were isolated from leaves. During this survey it was concluded that root rot was more prevalent than foliar spots. Such types of survey should be conducted every year for the situation of diseases.

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