Abstract
Aphelenchus avenae Bastian, 1865 and Bursaphelenchus fungivorus Franklin et Hooper, 1962 fed and reproduced on 54 and 56, respectively, of 59 fungus species. Both nematodes were attracted to most of the fungi, whether hosts or non-hosts. However, Sclerotium rolfsii Saccardo repulsed A. avenae. and Agaricus hortensis Cooke had no effect. Aphelenchus avenae was more strongly attracted to Fusarium oxysporum lycopersici (Saccardo) Synder et Hansen than to the roots of seedlings.