The direct reason why the root-knot nematodes endanger autumnal celery is that Apium graveolens belongs to the host plant of M. lucknowica.
造成勒克瑙根结线虫危害秋芹生产的直接原因是，秋芹属于勒克瑙根结线虫的寄主植物。
The direct reason why the root-knot nematodes endanger autumnal celery is that Apium graveolens belongs to the host plant of M. lucknowica.
造成勒克瑙根结线虫危害秋芹生产的直接原因是，秋芹属于勒克瑙根结线虫的寄主植物。
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