i6 



trating the healthy inner tissues, while the accompanying fungus 

 remained more or less on the surface. 



2. Galloway's record of the inoculation of green tomatoes with 

 Macrosporium is considered doubtful by Jones and Grout 3 , who 

 state conclusively that this fungus, called by them Alternaria, will 

 not grow on green tomatoes. 



3. Whitehead 2 states that Cladosporium is "evidently " the cause 

 of the disease, without apparently having attempted a proof by in- 

 oculation experiments. 



4. Having found a Macrosporium, a Cladosporium and an Alter- 

 naria in connection with the rot of tomato, the writer has thoroughly 

 tested all by inoculation experiments, but was unable to induce any 

 of these fungi to grow on green tomatoes. 



5. The writer, in a crop of tomatoes free from surface fungi, has 

 found Fusarium in the rotted tissue, which, when used for inoculating 

 green fruit, in every case produced a more or less natural spot. No 

 previous record of inoculation experiments with Fusarium has come 

 to the notice of the writer. 



6. Starch is the best medium for the growth of Fusarium found 

 by the writer, it occurring in great abundance in green tomatoes. 



Second, That the tissue of green tomato is a medium easily utilized 

 by fungi as food. That a number of fungi are instrumental 

 in producing rots which are often hardly to be distinguished from 

 each other. This conclusion has been reached from a study of the 

 following facts : 



1. Both Earle 4 and Stuart 5 report tomato rots which they find to 

 be caused by bacteria. In the former case surface Macrosporium is 

 reported, but in the latter no fungus of any kind was detected. The 

 descriptions of the two rots are very similar, though one is appar- 

 ently more " watery " than the other. In both cases the organism is 

 partially described, but the work is insufficient for comparison. 



2. The writer has studied a bacterial rot of tomato in which the 

 organism has been isolated and infection induced by repeated in- 

 oculation experiments. 



3. Inoculations were made with three bacterial organisms taken 

 at random by the writer, from one set of which a rot developed which 



