Memoir SS 



Plate I 



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HEALTHY AND TAKE-ALL-AFFECTED WHEAT PLANTS 



A, (left) Healthy wheat heads, (right) take-all-affected wheat heads. B, (left) Healthy 

 plant with five heads, height 40 inches; (right) diseased plant with one shriveled head, height 

 IS inches. C. Plants after four months growth: pot 13, check; pots 11 and 12, diseased straw 

 mixed with soil at planting time 



