72 
CORN. 
England during tlie last ten years, instead of the old system of grinding 
by millstones, appears to preclude this plan of remedy. 
Any information which would throw light on reasons for the 
presence of the moth, or means for prevention of its attacks, would be 
very desirable. 
\ 
“ Tulip-root ” and Segging ; Eelworms. Tylenchus devastatrix , 
Kuhn.; and Cephalobus rigidus , Schneider. 
“ Tulip-rooted ” Oat-plant. 
The diseased growth in Oat-plants, known from its peculiar bulb¬ 
like form as “ Tulip-root,” is caused (as has now been shown by the 
repeated observations of several years) by the presence of multitudes 
of minute Eelworms within the plant, these being much too small to 
be seen by the naked eye, though, where there is bad attack, their 
presence may often be guessed by the kind of whitish or pale brown 
powdery appearance of the inside of the'infested plant. 
The kind which causes the “ Tulip-root ” disease is scientifically the 
Tylenchus devastatrix of Kuhn, formerly known as the T. dipsaci, from 
its being then considered especially to infest Teazles ; but latterly 
(since its history has been taken up), from the great number of plants 
it has been found to attack, and the great mischief it has the power of 
causing, amounting sometimes to devastation of whole districts on the 
Continent, the special name has been changed to devastatrix. 
As the history and treatment has been given in my previous 
Reports, it does not seem desirable to repeat them here ; but it may 
just be mentioned that the two British crops which it especially affects 
are Oats and Clover, producing in the latter the form of “sickness” 
often known by swollen, distorted shoots. Barley appears not to be 
liable to infestation, and Wheat but little ; Rye worse than any other 
plant in continental growth, but not, as far as reported, in Britain. 
