Testing for Plant-parasitic Nematodes that Feed on Corn in Iowa 2000-2010

Fig. 4. Geographic distribution of damaging population densities of plant-parasitic nematodes from corn from samples submitted to the ISU Plant and Insect Diagnostic Clinic from 2000 to 2010.



Image from Plant Health Progress article:
Testing for Plant-parasitic Nematodes that Feed on Corn in Iowa 2000-2010