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Root-knot nematode (Meloidogyne incognita) affects all cucurbits. In Kentucky, root-knot nematode is a problem mainly in areas with lightly textured or sandy soils. Above ground symptoms include stunting and chlorosis of plants. Leaves of affected plants may develop chlorosis between veins or symptoms of nutrient deficiency; roots show a characteristic knotting and galling.    

Root-knot nematode on summer squash roots.

(Photo: Kenny Seebold, University of Kentucky)

Management:

• Manage weeds and potential alternative hosts.
• Avoid movement of infested soil to clean fields.
• Rotate with a non-host or nematode suppressive crop for 3 years.

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