WHEAT-BULB FLY. 
35 
a treatment desirable for prevention of Eelworm-infestation. The 
beneficial effect of good manuring to cause hearty growth, and special 
manuring with regard to the special nature of the attack, is noticed; 
but in one case in which an additional dressing of nitrate of soda is 
reported as being given (if needed), and the whole application is 
noted as not perfectly effective, I would venture to suggest trying 
the results of substituting sulphate of potash for the nitrate of soda, as 
I have before me a trustworthy report of the application of % cwt. of 
sulphate of potash per acre at once checking the Tulip-root disease, 
and bringing on a good growth where a previous dressing of nitrate of 
soda had done no good. 
The reason why Tulip-root (or Clover-sickness, which is caused by 
the same Eelworm) should sometimes occur after broken-up pasture is 
clear, on consideration that the Tylenchus devastatrix infests the “ Sweet 
Vernal Grass,” “Meadow Soft Grass,” and the “Annual Meadow 
Grass”; and amongst common meadow weeds, the Buttercup, or 
Upright Crowfoot, the Daisy, and the Ribwort Plantain*; and, as 
previously remarked, the presence of Barley in the plouglied-up lea 
would be a deterrent of attack, because, as far as we know, it is a 
plant on which this Tylenchus devcistatrix never feeds. 
The recurrence of the attack, where crops liable to the infestation 
are sown in succession or at short intervals, is also noticed as a 
practical observation, and, added to these special notes, the reports of 
definite amount of loss that is going on from this preventible disease 
show how desirable it is that attention should be given to the subject. 
(For further information, see pp. 6-12, on Clover Stem-sickness 
caused by T. devcistatrix , in present Report). 
Wheat -bulb Fly. Hylemia coarctata , Fallen. 
It has not been possible before to add a figure of the Hylemia 
coarctata in its several stages, to the observations of its habits, as the 
maggots were gone before the flies from them appeared by which we 
could tell of what species they had been. Now, however, I am able to 
give the following figure, sketched from English specimens. This shows, 
at (1 a), the shape of the whitish, legless, cylindrical maggot, somewhat 
pointed towards the head-end, which contains the black mouth-hooks, 
and apparatus for moving them, figured magnified at (2). At (1), the 
fleshy tubercles or teeth placed below the caudal extremity, and 
characteristic of this kind of maggot, are figured much magnified; 
with a low power these simply appear as a pair of squarish teeth, 
somewhat concave at the end, with one pointed tooth on each side. 
* See ‘ L’Anguillule de la Tige,’ by Dr. J. Ritzema Bos, pp. 66—G9. 
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