Carbon nematode resistant

[namwah]

Grew Carbon tomatoes for the first time this spring and was impressed. Good yields and tasty. Grew Mr. Stripy, Brandywine, Black Krim, Paul Robison and Indigo also.
When I finally pulled the plants this past weekend I saw the usual root knot damage on all of the plants except on the Carbon. Nice white strong roots similar to what the container plants had. Will be planting more of these.
Any one else have this experience?