206 
Microscopic examination of a sample of grass seed that had 
produced a diseased crop, showed that only about five per cent of 
the seed contained resting-spores of the fungus in the seed coat. 
1. Resting-spores in fragment of grass root = ea 
2. Resting-spores in fragment of grass 
3. Resting-spores in tess glume x ae 
taining zoospo 
eS 
Bae 
5 
eS. 
=| 
B 
~* 
® Resting-spore commencing to germinate x 400. 
Free zoospores x 600. 
This percentage, however, is more Ra sufficient to set up diseased 
patches at intervals in the seed-bed or lawn. These would serve as 
starting points from which the ipscte® could spread in every direc- 
tion, reres: esp y during a ae 
se in mater scattered plants when seven weeks old. t 
‘the soil with a solution of sulphate of 
on of water—the ‘ee of the disease 
