l^EW YoKK Agkicultukal Experiment Station. 161 



other. Usually, tlie affected branches were scattered all through 

 the top. Lateral branches were more apt to be affected than main 

 or leading branches, but there were some exceptions even to this 

 rule. If any part of a leaf was affected the whole of it was af- 

 fected, with very few exceptions. The majority of the affected 

 leaves were still hanging upon the twigs on October 4, but they 

 showed a tendency to fall somewhat earlier than the healthy 

 leaves. The twigs were plump and outwardly normal. The cortex 

 was green and apparently normal, but the sapwood was slightly 

 discolored. This discoloration was most pronounced on twigs of 

 the present season's growth, but was noticeable all along the 

 branch. ' 



The foreman in charge of the orchard states that the disease 

 appeared rather suddenly, although not quite all at once and that 

 it occurred about August 20. The orchard was affected in a 

 similar manner in 1898, but not so severely. In 1898 the scorch- 

 ing appeared in July before picking was all done and it was 

 feared that the following crop would be considerably lighter 

 because of it. However, such was not the case. The crop of 

 1899 was a heavy one and there were no visible effects of the 

 scorching of the foliage the previous summer. This orchard was 

 also slightly affected in 1897. 



It appears that cherries are much more liable to this sort of 

 injury than are pears, plums or apples. Scattered through the 

 affected cherry orchard there were a few small pear trees which 

 had been planted to replace dead cherry trees. ITone of these 

 pears showed any sign of leaf scorch; neither did the pears lo- 

 cated at A (see Plan) on the same kind of soil. Plum trees 

 at C and P immediately adjoining the diseased cherries were in 

 perfect health. The several different varieties of apples at E 

 were also unaffected. The English Morello cherries at B were 

 considerably affected but not so severely as the Montmorencies. 

 The Montmorency orchard at D was composed of young trees 



and situated upon moister and deeper soil. However, a good 



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