PLATE 37 

 Effect of Fusarium-blight on seed pieces of potato: 



A. — Early Ohio seed pieces: Control above; pieces inoculated with F. oxysporum 

 below. 



B. — Early Ohio plant. See piece inoculated with F. oxysporum. 



C. — Early Ohio seed pieces: Control (left) and inoculated (right) seed pieces. The 

 control shows the method used in inoculation. 



D. — Seed piece well decayed, resulting from soil infection. 



E. — Seed-piece rot in field. 



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