Field evaluation of indigenous and exotic Brassica juncea genotypes against Alternaria blight, white rust, downy mildew and powdery mildew diseases in India
Keywords:
Alternaria blight, Brassica juncea, Downy mildew, Powdery mildew, White rustAbstract
A study was conducted during 2007–08 to evaluate 71 genotypes of Brassica. juncea obtained from Australia, China and India against important diseases, Alternaria blight, white rust, powdery mildew and downy mildew occurring under the northern Indian field conditions. Two Australian genotypes, ‘JM06014’ and ‘JM06015’ expressed multiple field resistance to all 4 diseases. Australian genotypes ‘JM018’, ‘JM06021’and ‘JM06026’ exhibited field resistance to Alternaria blight and white rust, while ‘JR049’ and ‘JN033’ showed resistance only against white rust, Chinese genotypes ‘RK 2’, ‘Ringot’, ‘RH 13’, ‘AmoraIII’, ‘Quianxianjiecai’, ‘Yilihuang’, ‘Hatianyoucai’, ‘Jinshahuang’, ‘Manushuang’, ‘Brassica juncea I’, ‘Brassica-juncea 2’ and ‘Brassica juncea 3’ showed resistance against white rust. Genotypes ‘JM06009’ and ‘JM06012’ from Australia were resistant to powdery mildew, while all Chinese and Indian genotypes tested were susceptible to powdery mildew. No Indian genotypes tested showed resistance against Alternaria blight or white rust but genotypes ‘JM 3’ and ‘Kranti’ showed resistance to both downy and powdery mildews.
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