Tylenchus hordei Schøyen, a Nematode Parasite Causing Galls on the Roots of Barley and other Gramineae

• Published in: Journal of Helminthology
• Main Author: Goodey, T.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1925
• Subjects: Animal Science and Zoology; General Medicine; Parasitology; Norway; Pajala; Lorn; Northern Sweden
• Online Access: http://dx.doi.org/10.1017/s0022149x00002029; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022149X00002029

Forty years ago Schøyen (1885) gave an account of a serious disease of barley occurring in the vicinity of Lorn in Norway, which was associated with the formation of galls on the roots of the plants. The galls were found to contain eelworms which had without doubt caused their production and the symptoms of disease also. Schøyen named the worm Tylenchus hordei n.sp. Similar galls had been found at about the same time by Eriksson (1885) on diseased barley at Pajala in northern Sweden, but he had ascribed their formation to the nematode Heterodera radicicola Schøyen discussed this and gave reasons for thinking it an erroneous view. Closely similar galls had been found previously on the roots of Sea Lyme Grass, Elymus arenarius , by Warming (1877) in Sjaelland, Denmark, and by Trail (1881) at Aberdeen, Scotland. The former had considered that they were caused by Heterodera radicicola , whilst the latter thought they were due to a nematode belonging to the genus Tylenchus , though he was not positive on this as he only saw female worms.