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对调入北京的草莓种苗根结线虫病的为害症状及病原进行了观察和鉴定,其症状为草莓种苗根部有明显而密集的根结,直径1~3 mm。通过根结长度百分数分级法明确根结指数为55.42;通过雌虫显微形态观察以及ITS序列测定,初步明确病原物为北方根结线虫(Meloidogyne hapla)。
The symptoms and pathogens of strawberry root-knot nematodes transferred to Beijing were observed and identified. The symptoms were obvious and dense root knots in the roots of strawberry seedlings with the diameter of 1-3 mm. The root knot index was 55.42 by root knot length percentage classification. Through the microscopic observation of female and ITS sequence determination, the pathogen was identified as Meloidogyne hapla.