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XXXIV.—A NEW GRASS PARASITE. 
(Cladochytrium graminis, Biisgen.) 
G. MAssEE. 
The parasite was first observed in this country in 1908, when a 
sod of diseased grass was sent to Kew for determination. I 
connection with this it was stated that the disease had appeared in 
every instance, where portions of a consignment of continental grass 
seed had been sown. The spread of the disease was checked by the 
later stage myriads of thick-wall 
tissues of the root and of the lower leaves that are lying on the 
ound. In rare instances resting-spores are also present in the 
flowering glumes and in the “seed” coat. T 
happens when the inflorescence has by some means been pressed 
of Poa annua and of Festuca ovina, sown in soil infected by 
mixing with it a broken up sod of diseased grass produced diseased 
plants, whereas Dactylis glomerata, and Triticum caninum, sown 
_ in infected soil, remained free from disease. Control sowings of 
the four grasses im uninfected soil remained healthy. 
