Summarized Distribution of the Southern Root-Knot Nematode, Meloidogyne incognita , in Field Crops in the United States

The southern root-knot nematode, Meloidogyne incognita (Kofoid and White, 1919) Chitwood, 1949, is one of the most important, yield-limiting pathogens of agronomic and vegetable crops in the United States and worldwide. It was first reported on cotton ( Gossypium hirsutum L.) in Alabama in the United States. Since then, it has been reported in many states across the United States. These reports include detections in greenhouses, nurseries, or home gardens but do not provide information on where this species persists from year to year in field soils. Furthermore, these reports do not provide distribution information within each state in individual counties. This report summarized the distribution of M. incognita on field crops (e.g., agronomic and vegetable crops) by county for each state across the continental United States.