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Pakistan Journal of Biological Sciences
Year: 2000  |  Volume: 3  |  Issue: 1  |  Page No.: 122 - 125

Correlation of Environmental Conditions with Bacterial Blight Disease Severity on Advanced Lines/varieties of Cotton

Abdul Rashid and Muhammad Aslam Khan    

Abstract: Except rain fall, all the environmental variables had significant correlation with bacterial blight disease severity during 1997 and 1998. The correlation of weekly air temperature (maxlminl, soil temperature and pH was significant with bacterial blight disease severity recorded on majority of cotton linesivarieties. Weekly rain fall and wind speed had poor correlation with bacterial blight disease severity. The correlation of relative humidity with disease severity recorded on AU-59, B-874, MS-95 and S-152-93 was significant, while there was no correlation of this environmental variable with bacterial blight recorded on other varieties. Weekly air and soil temperature and soil pH need to be studied further to characterize environmental conditions conducive for bacterial blight disease development in epidemic form.

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