PLATE 40 

 Potato plants affected by Fusarium-blight: 

 A -Potato plant late in season with rolled leaves. Fusariura blight. 

 b!-Top of potato plant consisting of three stems. One leaf on one stem is wilted. 



^C.-Potfto plant of two stems, one at left showing Fusarium blight, or wilt caused 

 bv seed-piece infection; one at right healthy. 



D.-Plant with rolled leaves gradually dying from Fusarium blight. Severe case 



late in season. 



