iqiq] 



CLA YTON—FUMIGA TION 



497 



Fig. I. — Injury from cyanide fumigation to tomato plants ranging in age from 

 seedlings to mature plants (a, b, c, d); the injury is shown by the tlack areas, and 

 it will be noted that the leaf tissues killed in the small seedlings (a) are peripheral, 

 and also more or less apical. 



