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Effect of Two Plant-Parasitic Nematodes on Fusarium Dry Root Rot of Beans. Dave G. Hutton, Department of Plant Pathology, Cornell University, Ithaca, New York 14850, Present address of senior author: 20 Eastbourne Rd., Kingston 2, Jamaica, West Indies; Robert E. Wilkinson(2), and William F. Mai(3). (2)(3)Department of Plant Pathology, Cornell University, Ithaca, New York 14850. Phytopathology 63:749-751. Accepted for publication 27 December 1972. DOI: 10.1094/Phyto-63-749.

A study was made of the role of the plant parasitic nematodes, Pratylenchus penetrans and a mixture of Meloidogyne spp. including M. arenaria and M. javanica, in the dry root rot of beans caused by Fusarium solani f. sp. phaseoli. When ‘Red Kidney’ bean plants were subjected to a low inoculum level of the fungus, more plants were affected by the dry root rot among plants infected by either nematode genus than among nematode-free plants. When subjected to a high inoculum level of the fungus, all plants, whether nematode-free or nematode-infected, became infected by the fungus. Nematode infection had no effect on the severity of the fungus disease at either level of fungus inoculum.

Additional keywords: nematode-fungus interactions, Fusarium solani f. sp. phaseoli, Pratylenchus penetrans (Cobb) Chitwood & Oteifa, Meloidogyne spp., Phaseolus vulgaris L.