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THE CONNECTICUT POMOLOGICAL SOCIETY. 



the 1-4-50 strength on the fruit, this trouble will be greatly 

 lessened, but, of course, it will be much more prominent 

 some years than others. 



Influence of Weather. We know that rainy weather 

 develops a greater variety and abundance of fungous in- 

 juries than dry weather. A wet, cold spring increases peach 

 leaf-curl, apple scab and apple rust. Wet weather in July 

 and August multiplies brown rot of peach and sooty blotch 

 of apples. In 1910 there was considerable apple rust and 

 peach leaf-curl, and in 1911 sooty blotch was much more 

 abundant. Neither year, on the whole, was exceptional for 

 developing an unusual amount of fungous injury, hence the 

 various sprays did not have a very severe test as to their 

 fungicidal value. 



It is, however, more particularly of weather in relation 

 to spray injury that we wish to speak. The year 1910 pro- 

 duced a great deal more russeting of apples than 1911. As 

 considerable russeting appeared on apples that were not 

 sprayed at all, it appears that some other factor enters into 

 this injury. Most investigators have noticed more spray 

 injury, especially russeting, in weather unusually wet, rath- 

 er than dry, during the spraying season. Other writers 

 have called attention to frost injury of apples similar to that 

 described here under russeting. We have no doubt in our 

 own mind that much of the russeting in 1910 was due to 

 late frosts that came after the apples were set. In 1911 

 there was some frost injury at the beginning of the blos- 

 soming period, but not later to our knowledge. 



In 1911 far more scald developed than in 1910. In 

 fact, this was an unusual year in that respect. It was also 

 an unusual year as regards the hot, dry weather in June and 

 July, when the scorch first began to show. That the weath- 

 er had much to do with the trouble was shown by its ap- 

 pearance on apples that had not been sprayed at all. 

 Always, however, it was worse on the sprayed trees, and 

 so was really a combined spray-weather injury. 



