46 
CORN AND GRASS. 
Stem Eelworm. Tylenchus devastatrix , Kuhn. 
The diseased growth known as Tulip-root, or Segging, in Oats, is 
now so very well known both as to cause and methods found very 
serviceable both for prevention of recurrence of the attack, and to check 
it when present, that it hardly appears to require further notice. But 
from amongst the reports sent in during the past season I select just 
a few observations showing the great harm to the Oat crop sometimes 
caused by this attack. 
As has been before noticed in this series of Reports, this disease 
consists of a sedge-like growth of the leaves, or a kind of bulb-like 
growth of the base of the stem of the Oat plant, with a number of 
minute pale crinkled shoots massed round the somewhat Tulip -bulb 
formed enlargement. These growths are caused by the presence of 
the Stem Eelworm, the Tylenchus devastatrix , of the attacks of which 
to Clover and to Field Bean plants, notes are given at pp. 16—22, 
preceding. 
On the 9th of June, Mr. James Harper, writing from Auchnabo, 
Slains, Ellon (Aberdeenshire), mentioned that he was again troubled 
by Eelworms infesting an 8-acre field of Oats on the same land which 
was infested two years ago, and was the worst attack he had ever seen. 
“ I think there is scarcely a plant escaping attack.”—(J. H.) 
On the 30th of June, Mr. J. Gathorne Wood, of Thedden Grange, 
Alton, Hants, forwarded me specimens of Tulip-rooted Oats with the 
remark that in one field he had several acres of Oats almost destroyed 
by the infestation. 
The following observation sent early in August by Mr. John 
Hellaby, from Harlaston, near Tamworth, notes attack on a still wider 
scale, and gives an example of the patchy manner in which this kind 
of Eelworm attack often occurs, varying from infested spaces of several 
