Pathogenicity of Pratylenchus penetrans to Navy Bean (Phaseolus vulgaris L.)
Elliott, A.P.; Bird, G.W.
Journal of Nematology 17(2): 81-85
1985
ISSN/ISBN: 0022-300X PMID: 19294063 Document Number: 254257
The pathogenicity of P. penetrans (root-lesion nematode) to P. vulgaris (navy bean) was evaluated in greenhouse experiments. Shoot and root fresh weight of 'Sanilac' plants were increased 4 and 21%, respectively, by an initial population density (Pi) of 25 P. penetrans/100 cm3 soil. Leaf area and shoot fresh and dry weights were decreased by a Pi of 50 or more P. penetrans/100 cm3 soil. A significant positive linear relationship existed between initial soil population densities of P. penetrans and final soil and root population densities of this nematode. Three dry bean cultivars, Sanilac, Seafarer and Tuscola, were susceptible to P. penetrans, and yields were reduced by 43-76% when plants were exposed to a Pi of 150 P. penetrans per 100 cm3 soil. P. penetrans also reproduced on bean cultivars Saginaw, Gratio and Kentwood, but did not decrease bean yields, suggesting that these cultivars were tolerant to this nematode.