32 BULLETIN 453, U. S. DEPARTMENT OF AGRICULTURE. 



renders it impossible to i;ecommend any single treatment which wiU 

 be everywhere successful. Directions are given for simple tests, by 

 which it is believed that any nurseryman can develop a treatment 

 that will succeed under his conditions. 



(8) Further experiments are being conducted, with the hope of 

 discovering either a more generally applicable disinfectant method 

 than any of those so far tested or else a means of controlling the 

 disease without the use of disinfectants,, 



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