78 EXPERBIEXT STATION. [Jan. 



DISEASES MORE OR LESS COMMON DURING 



THE YEAR. 



G. E. STONE. 



Like the preceding one the past summer has been excep- 

 tionally dry, and the heat has been intense at times. This 

 drought, coming as it did after three or four previous dry 

 seasons has affected vegetation to a considerable extent, and 

 will result in later injury, especially to trees. 



Some of the diseases Avhich have been more or less common 

 during the summer are as follows : black rot of cabbage and 

 cauliflower (Pseudomonas), asparagus rust (Puccinia), bean 

 Anthracnose ( Collet otrichum) and celery rot. The cucumber 

 Fusarium wilt described in our last report has caused much 

 damage to greenhouse cucumbers, in many cases destroying 

 the whole crop, and is serious at the present time. Experi- 

 ments relating to the control of this disease are noAV being 

 carried on, but the nature of the trouble makes considerable 

 study necessary. A similar disease of tomatoes is also becom- 

 ing troublesome, but it does not cause so much damage to the 

 tomato as to cucumbers. 



A new disease of tomatoes characterized by bacterial infec- 

 tion of the leaves has recently been brought to our attention, 

 but at present we have found only one variety of tomatoes 

 affected. 



Many dahlias made a stunted growth this summer, and 

 others were deficient in flower production. From our observa- 

 tions w-e shonld say that this condition was not associated witli 

 attacks of either fungi or insects, but was due to some abnor- 

 mal feature causing a slow and stunted growth. 



A pecviliar instance of malnutrition was observed on corn. 

 This was caused either by too heavy applications of fertilizer 



