160 Report of the Botanist of the 



brief study of this disease convinced ns tlint we had here to do 

 witli a trouble similar to the leaf scorch of beets. Like the beet 

 disease it was most severe on trees standing in dry soil. Upon 

 inquiry among fruit growers it was found to be of common occur- 

 rence this year. 



The worst case of the disease which has come under our obser- 

 vation occurred in an orchard belonging to Maxwell Bros, near 

 Geneva. This orchard contained 715 ^lontmorency cherry trees 

 about eleven years of age, the trunks having a diameter of from 

 four to five inches. The trees were set fifteen feet apart each way. 

 Over the whole orchard the soil was uniform and had been 

 thoroughly cultivated. It consisted of a light clay underlaid 

 with slate at a depth of from eighteen inches to two feet. The 

 orchard w^as located on a gentle eastern slope and was closely 

 surrounded upon all sides by other fruit trees. 



On October 4 each tree in the orchard was examined and an 

 estimate made of the amount of foliage affected. The result was 

 as follows; 



1 tree, 100 per cent, of tlie foliajre affected. 



637 trees, 75 to 85 per cent, of the foliage affected. 

 57 trees, 50 per cent, of the foliage affected. 

 13 trees, 25 per cent, of the foliage affected. 

 5 trees, 5 per cent, of the foliage affected. 



2 trees, not affected. 



715 



It is an interesting fact that although six-sevenths of all the 

 trees in the orchard showed 75 per ct. or more of the foliage 

 affected there was but a single tree upon which all of the foliage 

 was killed. The trees were affected with remarkable uniformity. 

 The worst affected trees stood in no particular part of the orchard 

 but were scattered all through it. Although it frequently hap- 

 pened that one side of a tree would be severely attacked while 

 the other half was entirely exempt, there was no uniformity 

 »8 to the side attacked ; it was quite as often the north side as any 



