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Disease Note.

First Report of Meloidogyne graminicola in Mississippi. G. L. Windham, USDA-ARS, Mississippi State, MS 39762. A. M. Golden, USDA-ARS, Beltsville, MD 20705. Plant Dis. 74:1037. Accepted for publication 2 July 1990. Copyright 1990 The American Phytopathological Society. DOI: 10.1094/PD-74-1037C.

In May 1985, Meloidogyne graminicola Golden & Birchfield, the rice root-knot nematode, was found on white clover (Trifolium repens L.) in a pasture in Oktibbeha County, Mississippi. The nematode was cultured on white clover in the greenhouse. Clover plants were inoculated with single egg masses, and the nematode infected and reproduced on all plants. White clover is an excellent host and is severely galled by the nematode. Although commonly found in the rice-producing areas of Asia, M. graminicola has been detected in only two other southeastern states in the United States (1,2). Previously reported hosts in this country include bush bean (Phaseolus vulgaris L. var. humilis Alef. ) and a number of hosts in the Gramineae family (1). This finding is the first report of a Trifolium sp. as a host for the rice root-knot nematode.

References: (1) W. Birchfield. Phytopathology 55: 1359, 1965. (2) N. A. Minton et al. Plant Dis. 71:376, 1987.