PLATE IS 



Different types of blackleg tuber-rot. 



A-C— Characteristic appearance on fresh specimens of the Netted Gem variety 

 from Idaho. 

 D, E. — T3rpical development on round varieties in the East. 



p^ G.— Other forms occurring on round varieties in various sections of the coimtry. 

 Arrows in A, B, and C indicate the border line of decay. 



