Host Suitability of Commercial Corn Hybrids to Meloidogyne arenaria and M. incognita.

The host suitability of 64 commercial corn hybrids for a Meloidogyne arenaria race 2 population and a M. incognita race 4 population was determined in greenhouse experiments. 'Northrup King 508' and 'Pioneer Brand 3147' maintained M. arenaria below and at the initial population level, respectively, indicating that these hybrids are relatively poor hosts for this species. RF values (final egg number/initial egg number) of the hybrids for M. arenaria ranged from 0.8 for Northrup King 508 to 42.3 for 'Pioneer Brand XC941'. All hybrids were excellent hosts for M. incognita with RF values ranging from 20.7 for 'Sunbelt 1860' to 49.5 for Pioneer Brand XC941.