THE BOOK OF THE PEONY 



planted, it will be found entirely practicable and 

 profitable. Even in a large area I believe the 

 eradication measures I have outlined are worthy 

 a thorough trial. 



Conclusions. — The ultimate end and object 

 of all plant disease investigations is control. It 

 must be evident from what has preceded that our 

 knowledge of the diseases of the peony is limited, 

 indeed, that most of it is yet to be discovered. 

 Naturally then our suggestions as to control can- 

 not be specific. They must be general and they 

 cannot be taken as positive recommendations, only 

 suggestions based on limited knowledge as to the 

 most likely lines along which success is to be ex- 

 pected. Spraying cannot of course get at the 

 root troubles and our past experience and the 

 ornamental character of the plant both discourage 

 this as a means of protecting the parts of the plant 

 above ground. Sanitary measures involving the 

 prompt eradication of the diseased parts, as I have 

 already suggested for the most of the diseases de- 

 scribed, offer the most practicable and satisfac- 

 tory methods for the control of the various mala- 

 dies to which this beautiful ornamental is subject. 



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