152 JAMIESON AND WOLLENWEBER : FUSARIUM TRICHOTHECIOIDES 



instance the decay appears to work from the surface inward. 

 From results of this experiment it is clear that conditions of tem- 

 perature and moisture undoubtedly play an important part in 

 the beginning and in the progress of infection, and a better under- 

 standing of these conditions may prove of great value in attempt- 

 ing to control this dry rot disease especially among potatoes kept 

 in storage. 



SUMMARY 



1. F. trichothecioides Wollenw. is a wound parasite capable of 

 destroying potato tubers. 



2. This fact is proved by the inoculation experiments of Miss 

 Jamieson. 



3. This disease is clearly differentiated from the wilt and dry 

 rot ascribed by Smith and Swingle to FusariumoxysporwnSchlecht. 



