July 10. 1916 Storage-Rots of Economic Aroids 555 



January 13, and D. gossypina was recovered. In the moist chamber 

 two tubers were sound; the other two rotted a very little, one of which 

 yielded Fusarium solani and the other F. oxysporum. Out of six other 

 tubers inoculated on March 1 five were completely rotted on March 26. 

 The checks, five in all, remained sound. 



On January 29, 1915, ten tubers were inoculated with Diplodia sp. from 

 Mangijera indica. Nine of these tubers showed evidence of rot on 

 February 8 ; and on February 20 six were completely decayed, three were 

 half-decayed, and one remained sound. The checks, five in number, 

 remained sound. 



INOCULATIONS OF XANTHOSOMA SAGITTIFOLIUM 



On November 30, 19 14, five tubers were inoculated with Diplodia tuberi- 

 cola from dasheen and five with the same organism from sweet potato. 

 On December 23 all the tubers in both lots were rotted and the causal 

 organism was recovered in pure culture. The checks, five in number, 

 remained sound. Six other tubers were inoculated on December 9 with 

 the sweet-potato organism, and on January 2, 191 5, D. tubericola was 

 recovered from fT>ur and Fusarium oxysporum from two. 



On January 4, 1915, ten tubers were inoculated with D. maclurae and 

 five with D. gossypina. By February 10 five of the former and three of 

 the latter were decayed and the causal organisms recovered. The five 

 checks remained sound. 



INOCULATION OF COLOCASIA INDICA 



On December 9, 1914, four tubers were inoculated with D. tubericola 

 from dasheen and five with the same organism from sweet potato. All 

 the tubers in both lots were completely decayed on January 2, 191 5, and 

 the causal organism was recovered. The checks, four in number, re- 

 mained sound. 



INOCULATION OF ALOCASIA SP. 



Five tubers were inoculated on January 2 with D. tubericola from 

 dasheen, and on February 10 three were decayed. D. tubericola was 

 recovered from two and Fusarium sp. from one. The two others and 

 the five checks remained sound. On the same day five tubers were inocu- 

 lated with the same organism from sweet potato, and on February 10 

 one tuber was sound. The four others were only partially decayed, but 

 D. tubericola was recovered from the rotted portion. It appears that, 

 while this species is not wholly immune to the rot, it is more resistant 

 than the others. On January 4, 191 5, four tubers were inoculated with 

 D. maclurae and four with D. gossypina. All those inoculated with D. 

 maclurae remained sound, but of those inoculated with D. gossypina two 

 were completely decayed and two one-third rotted. The causal organ- 

 ism was recovered from each. 



