454 OHIO EXPERIMENT STATION: BULLETIN 214 
culture dishes and greenhouse recently, show that the fungus survives in the 
old dedd seeds as well asin some capable of germination and attacks the 
seedling wheat plants during the first month of their growth. In the con- 
tinuous wheat plots of the Station it was found that nearly 6 percent of the 
plants were killed off in the unfertilized plots during 1907; the fertilized plots 
show a good deal less and the rotation plots a great deal less (see Bulletin 203). 
Not only may the fungus survive in its perithecial form upon wheat heads, straw 
and dead scab grains, but it may survive in grain capable af germination as 
well as in the soil. See pages 334-335. Recent studies of diseases of clover and 
alfalfa seem to show that this same fungus is the cause of serious clover and 
alfalfa sickness. It would thus appear to be carried over through rotations of 
clover, etc. The best method of handling appears to be recleaning seed wheat and 
getting out all shriveled kernels which are often scab-infested as well as all under 
sized kernels thus evading a large share of the infection in seed wheat. 
Seedling Blight. The seedlings of wheat are killed off by the attacks of the 
scab fungus which is transmitted in the seed as well as in the soil devoted to 
continuous wheat culture. (See scab above, also Bulletin 203.) 
Fig, 104, On left, healthy normal kernels of wheat; on the right, 
above kernels in ured by scab which will not germinate—below ker- 
nels injured by weavil. From Bulletin 203. 
