Resistance of Maize Inbreds to Meloidogyne incognita and M. arenaria. G. L. Windham, Research Plant Pathologist, USDA-ARS, Crop Science Research Laboratory, Mississippi State, MS 39762. W. P. Williams, Research Geneticist, USDA-ARS, Crop Science Research Laboratory, Mississippi State, MS 39762.. Plant Dis. 72:67-69. Accepted for publication 29 July 1987. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1988. DOI: 10.1094/PD-72-0067.

Forty-eight maize inbreds were evaluated for resistance to Meloidogyne incognita race 4 and M. arenaria race 2 in the greenhouse. Resistance was based on host suitability by determining reproduction factors (RF) (final egg numbers/initial egg numbers) and number of eggs per gram of fresh root. Mp307 had the lowest RF value (1.8) and the lowest number of eggs per gram of root (756) for M. incognita. The lowest RF value (0.2) for M. arenaria was recorded for AR218, Mp313, SC213, and T220. Eighteen inbreds failed to maintain the M. arenaria population at the initial population level. Number of M. arenaria eggs per gram of root ranged from 182 for Mp313 to 8,069 for Mp84:5173. Although several inbreds were poor hosts for both nematode species, resistance to M. incognita was not correlated with resistance to M. arenaria.

Keyword(s): Zea mays.