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Phoma lingam seed assay – cauliflower 19x

Black pycnidia of the blackleg fungus, Phoma lingam,on an infected cauliflowerseed. Note the amethyst-colored cirrhi (gelatinousmatrix) oozing from thepycnidia, which indicatesthe strain of the pathogenis virulent(able to causePhoma leaf spot or blackleg of brassicas)
Photo Source: Lindsey du Toit, Washington State University.