Comparative Root-Knot Galling and Yield Responses of Soybean Cultivars to Meloidogyne incognita. R. A. Kinloch, Associate Nematologist, University of Florida, Agricultural Research and Education Center, Jay 32565-9524. C. K. Hiebsch, Assistant Agronomist, University of Florida, Gainesville 32611; and H. A. Peacock, Agronomist, University of Florida, Agricultural Research and Education Center, Jay 32565-9524. Plant Dis. 69:334-336. Accepted for publication 18 October 1984. Copyright 1985 The American Phytopathological Society. DOI: 10.1094/PD-69-334.

Field trials containing resistant and susceptible soybean cultivars were conducted from 1981 through 1983 on a loamy sand infested with Meloidogyne incognita. Nematode populations were monitored and root-knot galling was evaluated. Yields were negatively correlated to the amount of root-knot galling in the three trials, but soil nematode populations at harvest were correlated in only one trial. Yields from resistant cultivars were five times greater than those from highly susceptible cultivars.

Keyword(s): Glycine max, southern root-knot nematode resistance.