SOME STEM TUMOES OK KNOTS ON APPLE AND QUINCE TREEt 



affectino; the 



twigs 



and smaller limbs (fig. 3). A good example 



of the disease as found on all parts of the tree occurs on a Charlamoff 

 apple tree in the experimental orchard of the Arkansas Agricultural 

 Experiment Station, Faj^etteville, Ark. This was first reported to 

 the Bureau of Plant Industry by Vincenheller, of that station, who 

 kindly donated the tree to the Department of Agriculture for further 



t Ciuco, Cal 



'2. — Stem tumors on a Mt'och (jiiim 



study. The progress of the disease on this tree has been noted for 

 three successive years. 



The tumors on this tree are exceptionally large at the beginning, 

 and frequently appear in the form of a smooth swelling surrounding 

 the base of a dormant bud (fig. 3), quite often the terminal bud of 



[Cir. 3] 



