726 Popular Editions of Station Bulletins. 



from two to four times each season. This work was done by the 

 Station botanists with great care, but at no time during the* pro- 

 gress of the experiment has the disease been noticeably checked. 

 The infections seemed as numerous and as injurious on the treated 

 as on the untreated plats, and the yield of fruit was even smaller 

 on the treated plats. Accordingly, summer pruning can no longer 

 be recommended for the control of necrosis. In fact, no method of 

 treatment can be confidently recommended at present, although 

 experiments in spraying are being continued. 



