16 SOME STEM TUMORS OR KITOTS ON APPLE AND QUINCE TREES. 



Reports have been received from a number of localities where all 

 the trees in orchards affected by these tumors (fig. 1) have been cut 

 down on account of their presence. In the absence of data proving 

 the disease to be seriously injurious and in view of the writer's ob- 

 servations, orchardists are advised for the present to allow such trees 

 to remain in their orchards in cases where there is no apparent spread 

 of the disease and where the trees are bearing profitable crops of 

 fruit. If, on the other hand, the trees are not doing well as compared 

 with healthy trees, it would be better to remove them. 



REPOBTS DESIRED ON THE DISTRIBUTION AND SEVERITY OF 

 STEM TUMORS OR KNOTS. 



It will readily be seen that further information as to the distribu- 

 tion and severity of this disease is needed. To this end it is proposed 

 to visit as man}^ localities as possible where outbreaks of the disease 

 are reported. 



All persons who have observed stem tumors or knots in orchards 

 will confer a favor and will aid in accumulating data if they will 

 report the localities Avhere the disease occurs, with notes as to its 

 severity. All communications should be addressed to the Bureau of 

 Plant Industr3% U. S. Department of Agriculture, Washington, D. C. 



Approved : 



James Wilson, 



Secretary of Agriculture. 



Washington, D. C, ApHl i, 1908. 



[Cir. 3] 



o 



