Root Knot Nematode of Cotton

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Root knot nematodes are microscopic roundworms that are widely distributed throughout North Carolina on many crops and cause varying degrees of damage to cotton. Root knot of cotton is caused by Meloidogyne species, including the southern root knot (M. incognita), northern root knot nematode (M. hapla), and the most recently introduce the guava root knot (M. enterolobii). The guava root knot nematode is an invasive species that has been found in the southeastern United States, with official reports in Florida and North Carolina. Other official reports include Brazil, Mexico, Malawi, South Africa, and West Africa (Senegal, Ivory Coast and Burkina Faso). China, Vietnam, Central and South America, France, and Switzerland. It is also widely distributed in the Caribbean islands, including Cuba, Puerto Rico, Tobago, Trinidad, Guadeloupe and Martinique.

Lindsey Thiessen
Yara Rosado Rivera
NC Coorporative Extension