Root Knot

Meloidogyne incognita, and other Meloidogyne sp.

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Symptoms:
Infected plants are not vigorous, off color, and progressively decline. The decline becomes rapid as the fruit load increases. Roots are swollen and covered with galls.

Control:
The root knot nematode is very difficult to control. Crop rotation with a non-susceptible species is important, and avoiding planting tomatoes after other highly susceptible species (cotton, okra) is a primary control. Many tomato varieties are resistant, so variety selection is also important.

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Publication Revised December 2008