PLATE LXXXI 



Fig. i. — A dasheen corm (Colocasia escuhnta) showing Java blackrot produced by 

 Diplodia tubericola. The blackrot end of the corm is separated from the healthy 

 tissue by a dark brown area which in turn blackens later. Field material from Brooks- 

 ville, Fla. 



Fig. 2. — A corm of Alocasia sp. showing Java blackrot produced by D. tubericola. 

 From a laboratory inoculation. 



Fig. 3. — A dasheen tuber partially decayed by Sclerotium rolfsii. From a laboratory 

 inoculation. 



(572) 



