Additional Sources of Resistance to Race 2 of Fusarium oxysporum f. sp. apii. D. C. Opgenorth, Graduate Research Assistant, Department of Plant Pathology, University of California, Riverside 92521. R. M. Endo, Professor, Department of Plant Pathology, University of California, Riverside 92521. Plant Dis. 69:882-884. Accepted for publication 1 March 1985. Copyright 1985 The American Phytopathological Society. DOI: 10.1094/PD-69-882.

Seventy-one lines of Apium graveolens var. dulce (celery), A. graveolens var. graveolens (celery), A. graveolens var. rapaceum (celeriac), and A. graveolens var. secalinum (smallage) were evaluated for their resistance to race 2 of Fusarium oxysporum f. sp. apii by growing them in infested soil and rating the plants for incidence of infection and extent of vascular discoloration in the roots, crowns, and petioles 8–10 wk after inoculation. Four lines (three of celeriac and one of smallage) were found highly resistant, and 14 lines were found moderately resistant at an inoculum density of 1 × 10⁶ macroconidia and microconidia per gram of U.C. soil mix.