VIEW ARTICLE

Resistance in Peas to Fusarium and Pythium Root Rot. J. M. Kraft, Research Plant Pathologist, Crops Research Division, ARS, USDA, Prosser, Washington 99350; D. D. Roberts, Research Technician, Crops Research Division, ARS, USDA, Prosser, Washington 99350. Phytopathology 60:1814-1817. Accepted for publication 21 July 1970. DOI: 10.1094/Phyto-60-1814.

Accessions 140165, 183910, 194006, 210587, and 223285 exhibited resistance to Fusarium solani f. sp. pisi, Pythium ultimum, and the combination of these two pathogens at all inoculum levels tested. In 28 days, populations of F. solani f. sp. pisi increased more in rhizosphere soil from roots of susceptible Dark Skin Perfection than in soil from the roots of resistant lines. Furthermore, F. solani f. sp. pisi did not sporulate as readily in seedling exudates from the resistant lines as in seedling exudates from Dark Skin Perfection. An increase in population of P. ultimum could not be detected in the rhizosphere of either susceptible or resistant lines; however, P. ultimum did not grow as readily in seedling exudates from the resistant lines as in exudates from Dark Skin Perfection.