46 MAINE AGRICULTURAL EXPE;RIMENT STaTION. 



red cedar in the form of little swellings of the limbs known as 

 "cedar apples." After the first warm rains come these swell 

 up and become gelatinous and also somewhat orange tinted. 

 It is then that the spores are formed and matured which infect 

 the quince and apple. These spores are not able to re-infect 

 the red cedar. To produce the disease of the latter the other 

 form of the spores must come back from the quince or apple 

 or some closely related fruit. 



Where spraying is attempted the quince or apple trees should 

 be sprayed with a bordeaux mixture or lime-sulphur just before 

 the cedar apples on the red cedar become gelatinous, repeating 

 this twice at the intervals of a week or ten days. 



Much injury from russeting of apple fruits was observed 

 during the past season which was directly traceable to weather 

 conditions which existed during the earlier part of the season, 

 although this was in some instances incorrectly attributed to 

 spraying. When the fruit was setting, and shortly thereafter, 

 weather conditions were very unfavorable, with late frosts and 

 heavy rains associated with strong, cold winds. Warm weather 

 previous to this, or late in April, forced the flower buds to 

 early opening. These circumstances combined, resulted in al- 

 most a total failui"e of the apple crop. Such fruit as did set 

 was more or less injured. Nearly 32 per cent of the crop of 

 the unsprayed trees at Highmoor Farm were russeted at har- 

 vest time, and this could only be accounted for as the result 

 of the conditions mentioned above. Early in the season frost 

 injury was plainly evident on apple leaves in many instances. 

 It is possible that some form of orchard heating such as is prac- 

 ticed in the far West might be effective in preventing disasters 

 oi this kind, although unfavorable weather conditions in the 

 spring of 1913 were so prolonged as to make the expense for 

 heating prohibitive. 



The usual amount of brown rot and black knot on plums 

 as well as plum pockets was received. The recommendations 

 for control are given on pages 295 and 296 of the Report ol 

 the Commissioner for 1912, and need not be repeated here. 

 One specimen of peach leaf curl was received in 1913. Whi^e 

 this is a very serious disease in some localities it is of little 

 economic importance in Maine since here the peach is grown 



