Incidence of <i>Meloidogyne incognita</i> and Development of Resistant Soybean Germplasm in Illinois

Fig 3. Highlighted are the 17 counties included in this survey. Counties with dark green shading were infested with Meloidogyne incognita. The nematode was not detected in the counties that are shaded in light gray.



Image from Plant Health Progress article:
Incidence of Meloidogyne incognita and Development of Resistant Soybean Germplasm in Illinois