jSTew York Agricultueat. Experiment Station. 163 



In no other orchard examined have the trees been so uniformly 

 affected as in this one; perhaps because in no other case have 

 the soil and conditions been so uniform. In general, trees af- 

 fected in varying degrees up to one-half of the foliage have been 

 found freely intermingled with perfectly healthy trees ; but when 

 an orchard was situated partly on dry and partly on moister 

 soil, the disease was invariably worst on the trees standing in the 

 dry soil. 



In one orchard of large trees of Montmorency the disease was 

 confined chiefly to the lower branches. A cherry grower at 

 Hector states that in his orchard the trees were generally affected 

 upon the south side, but in the orchards about Geneva we have 

 not observed that the south side of the tree is more often affected 

 than any other side. Trees standing in exposed situations have 

 been no more affected than sheltered trees. 



As to the time the injury occurred there is a difference o£' 

 opinion among fruit growers. Some believe that the injury came- 

 on gradually, but the majority are of the opinion that it occurred 

 within a comparatively short space of time. Some say it occurred 

 early in August, others about the middle of August and one is. 

 certain that his orchard was not affected until the first week in 

 September. It is not improbable that there were two periods 

 when the weather conditions were favorable to the scorching of 

 foliage. One occurred some time during the first half of August 

 and the other on Sunday, September 3. On the latter date 

 the temperature was high, the air dry and a strong wind blow- 

 ing. The writer expected much injury to result from this, but 

 observed none whatever. ISTevertheless, cherries in some situa- 

 tions may have been injured. 



Some have attributed leaf scorch to over-bearing, but there is 

 no evidence to support this theory. In many cases trees which 

 have never borne fruit have been severely affected. It is possible 

 that fruit-bearing tends to increase the liability to the disease, 

 but even that remains to be proven. 



