Abstract
Some characteristics of egg shells and morphology of tail tip were examined for two strains of Bursaphelenchus xylophilus, a strain of B. mucronatus and five strains from France which are not yet identified. Egg shells of the two strains of B. xylophilus were found to adhere to polystylol and combined with wheat germ agglutinin (lectin) more firmly than those of B. mucronatus. The five strains from France varied widely in these characteristics, but one of them showed the similarity to B. xylophilus. Tail-tip shape of adult females of all strains from France resembled that of B. mucronatus. Jpn. J. Nematol. 15: 49-54 (1985).