root knot

American  

noun

Plant Pathology.

1. a disease of plants, characterized by galls or knots on the roots and stunted growth, caused by any of several nematodes of the genus Meloidogyne.

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root knot Scientific  

1. A disease of plants characterized by protuberant swellings on the roots caused by infestation with nematodes.

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Etymology

Origin of root knot

First recorded in 1885–90

Example Sentences

In digging out some old peach trees, I find now and then a tree affected with root knot.

From One Thousand Questions in California Agriculture Answered by Wickson, Edward J. (Edward James)