Susceptibility of Impatiens Cultivars to Root-Knot Nematode, Meloidogyne arenaria. J. T. Walker, Professor, Department of Plant Pathology, University of Georgia College of Agriculture, Georgia Station, Experiment, GA 30212. Plant Dis. 64:184-185. Accepted for publication 4 October 1979. Copyright 1980 American Phytopathological Society. DOI: 10.1094/PD-64-184.

Impatiens cultivars consisting of 10 commercial hybrids, three plant introductions, and eight New Guinea hybrids were all susceptible to the root-knot nematode Meloidogyne arenaria in the greenhouse. Cultivars Futura White and Futura Red may have had some tolerance, based on growth and root-knot index. All infected cultivars, with the exception of Futura Red, weighed less (dry weight) than noninfected control plants. Infected commercial hybrids generally were taller than control plants, whereas New Guinea hybrids were shorter.