Meloidogyne incognita on Society Garlic and Its Control. R. McSorley, Associate Nematologist, Agricultural Research and Education Center, 18905 S.W. 280 Street, Homestead, FL 33031. R. T. McMillan, Jr., Associate Plant Pathologist, J. L. Parrado, Biologist, Agricultural Research and Education Center, 18905 S.W. 280 Street, Homestead, FL 33031. Plant Dis. 68:166-167. Accepted for publication 25 October 1983. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-166.

Society garlic (Tulbaghia violacea) was heavily parasitized by the root-knot nematode Meloidogyne incognita. Few galls were apparent on infested plants, but numerous mature egg masses were evident throughout the root system. Immersion of rhizomes and roots in a hot water bath at 25, 47.5, 50, 52.5, 55, or 57.5 C for 2.5, 5, 7.5, 10, or 15 min was investigated as a control measure. All treatments at 50 C or higher and intervals of 5, 7.5, and 15 min at 47.5 C eliminated recovery of M. incognita. Excellent recovery was obtained from the controls at 25 C. Severe plant damage occurred at 52.5 C or higher or with 15-min exposures at 50 C. Optimum nematode control with minimum plant damage was achieved with exposure at 50 C for 2.5 min or at 47.5 C for 15 min.