i8 



In several cases during this season a small spot has appeared on 

 very abnormal tomatoes at some distance from the style. This posi- 

 tion has been mentioned in previous literature, but had not before 

 been observed by us. In these cases the rot was found to have 

 started from the pistil and in the pulp of one or more carpels, whence 

 it had spread to the pericarp at the point where the spot appeared. 

 Similar spots in this position were found to have been caused by 

 bruising of the fruit. 



SUMMARY OF RESULTS. 



i. Fusarium solani, Mart., may occur in connection with tomato 

 rot, unaccompanied by any other fungus. 



2. A tomato rot with the same characteristics may be produced 

 artificially by inoculation with the Fusarium. 



3. The same may be produced by ..placing Fusarium about the 

 style. (This occurred in only one case.) 



4. Fusarium grows readily on most of the substances found in 

 green tomatoes, but less readily on sugar than starch, and not at all 

 in malic acid above 3$. 



5. Starch is converted by the fungus in direct absorption rather 

 than by excreted diastase. 



6. Fusarium solani will grow readily on all of our root vegetables, 

 but most vigorously on potato. 



7. Mycelium extract from Fusarium has the power of killing pro- 

 toplasm and blackening the cells of green tomatoes. 



8. Tomato rot may occur free from fungous growth, but contain- 

 ing a characteristic bacterial organism. 



9. The same may be reproduced both by inoculation and by 

 spraying with the organism in bouillon culture. (The latter was 

 successful in two cases only.) 



10. The organism isolated is an aerobic, spore-producing, mono- 

 trichic, oval form, producing a yellowish color on most media. 



In the first part of the work here recorded much assistance was 

 received from Prof. R. E. Smith, now of the University of Califor- 

 nia. The work on bacterial rot was done under the direction of 

 Prof. G. E. Stone, by whom many of the experiments have been dup- 

 licated. 



