College of Agriculture, Cornell University. 



Ithaca, N. Y. 

 Hon. Chas. A. Wieting, 



Commissioner of Agriculture. 



Sir: — I hereby transmit a report of the investigations of the College 

 of Agriculture on blight cankers that are coming to be very destructive 

 of apple trees in many parts of the State. 



This canker is found to be due to the same organism (a bacterium) 

 that causes the blight of the pear. It is superinduced by over-rapid 

 growth of the tree, and the points of inoculation are water-sprouts, 

 wounds, and possibly the flowers. There is no cure, but further spread 

 of the cankered areas may be prevented by careful treatment of the 

 wounds as explained on page 119. 



]\Iany of the bulletins issued by this institution relate to the applo 

 industry in New York State, and the following numbers are devoted ex- 

 clusively to it: 



48. Spraying Apple Orchards. 



84. The Recent Apple Failures. 



116. Dwarf Apples. 



207. Pink Rot an Attendant of Apple Scab. 



214. The Ribbed Cocoon-Maker of the Apple. 



226. An Apple Orchard Survey of Wayne County, New York. 



229. An Apple Orchard Survey of Orleans County, New York. 



Respectfully submitted, 



L. H. Bailey, 



• Director. 



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