New York Agricultural Experiment Station. 149 



distribution, and if it serves as a host plant for the fungus of 

 snapdragon anthracnose the problem of controlling the latter 

 disease is a more complicated matter than has been supposed. 



Accordingly we made a thorough examination of the disease 

 and the fungus causing it. The majority of the spots were black 

 with the acervuli of a Colletotrichum. Setre and spores -vere 

 abundant. The leaves on the diseased portion of the stem were 

 nearly all dead and brown. Close examination revealed the 

 presence of anthracnose spots on the dead leaves and there were 

 also a few spots on the living leaves, but the leaf spots were in- 

 conspicuous and not abundant. In all morphological characters 

 the fungus agrees fully with Colletotrichum ontirrhini and there 

 is little doubt but it is that fungus. However, positive proof 

 depends on cross inoculations with pure cultures. These have 

 not been made. 



It was found that many small plants had been killed outright 

 by the disease, but that there were also many others which, 

 although their stems were covered with the spots, were, never- 

 theless, flowering and apparently thriving. While the disease 

 evidently does some damage to the wood, it seems unlikely that 

 it can be turned to any practical account as an aid in its eradica- 

 tion. 



The original place of discovery was near Milton on a steep 

 hillside in a rather dry situation where the plants were partially 

 shaded by peach trees. Later it was found in similar situations 

 on two other farms at Milton and also at Middle Hope. 



IV. IMPEEFECT FERTILIZATION AND THE LITTLE 



PEACH DISEASE. 



During the past few years peach growers in Michigan and 

 in Western New York have been much concerned over the ap- 

 pearance of a new and destructive disease known as the '" little 

 peach " disease. It appears to have been first described by Taft^ 

 in March, 1898. In October of the same jear a more extensive 



= Taft, L. R. Mich. Agr. Exp. Sta. Bui. 155:303-304. 



