Susceptibility and Yield Response of Sixty-nine Soybean Varieties to Frogeye Leaf Spot and Southern Root-knot Nematode, 2025
The southern root-knot nematode (Meloidogyne incognita) is a major threat to soybean production and is the most yield-limiting plant-pathogenic
nematode in the Mid-South. It is found in nearly all soybean-growing counties in Arkansas
and can cause significant grain yield losses (>70%) when a susceptible variety is
planted in a field with a high population density of southern root-knot nematode (RKN).
This report summarizes the susceptibility of 69 commercially available soybean varieties to the southern RKN that are marketed as suitable for production in southern RKN fields.