334 OHIO EXPERIMENT STATION: BULLETIN 214 
that new area specific seed and soil troubles which have been proved 
to be perpetuated in the infected seed. An anthracnose of flax and 
a Fusarium attacking flax seed are examples. 
No less conspicuous is the case of the blight fungus of peas, 
Ascochyti pist, which is also an anthracnose, and the allied anthrac- 
nose of beans, Colletotrichum lagenarium. Investigations made at 
this Station by Van Hook show the source of the trouble with peas 
to be the infected seed employed and show also that seed treatment 
will not destroy these internal fungi without destroying the vitality 
of the seed. It was further shown that the source of relief zs in 
growing healthy seed through the use of fungicides upon thé pea 
vines from which seed is gathered; likewise that infection way 
remain in the soil, (See Bulletin 173). 
Fig. 14. Showing physician’s centrifuge and other apparatus used in making 
examinations of grain washings for smut spores and spores of other diseases adher- 
ing to the exterior of seed. The flasks at the right show samples of washed grain. 
Those at the left show amounts of grain and water used. The glass tubes in con- 
tainer are used in the metal holders of the centrifuge. The precipitates in bottoms 
of tubes were obtained from washing of oats and wheat samples in flasks. (From 
Bul. 203), 
More recent work at this Station has shown the presence of seed 
infesting and seed infecting diseases in wheat. (See Bulletin 203). 
The illustration, Fig. 15, exhibits the germinating seeds of wheat 
with the outgrowth of the parasitic fungus (Fusarium) which we 
find associated with wheat scab. Thisis upon seed grains (kernels) 
that are not destroyed by the fungus; many of the kernels of scabby. 
