Response of Nematode-Resistant Cotton Germplasm to Infection By Two Isolates of the Guava Root-Knot Nematode, Meloidogyne enterolobii

The guava root-knot nematode (GRKN) (Meloidogyne enterolobii) is an emerging pathogen of cotton, sweetpotato, soybean, and other crops in the southeastern United States. It has been shown in multiple instances that resistance to the southern root-knot nematode (M. incognita) is insufficient in stopping GRKN infection. GRKN isolates from North and South Carolina were obtained, cultured on cotton, and inoculated on germplasm lines resistant to either or both M. incognita and reniform nematode (Rotylenchulus reniformis). Experimental data and implications for future research will be presented.