l82 MAINE AGRICULTURAL EXPERIMENT STATION. IQl6. 



check plot, also that the amount of russeting on it is less than 

 on the fruit on rows 12 and 13 which were used for making 

 the record given for plot 8 in Table 1. Other factors apparently 

 being eliminated it would seem that the application of the dor- 

 mant strength lime-sulphur, after the leaf -buds had begun to 

 open, but at a time when the flower-buds were still quite thor- 

 oughly protected was in some way responsible for the increased 

 amount of fruit russeting observed later. Regardless of the 

 cause of the russeting there appears to be no advantage from the 

 standpoint of scab prevention in applying the dormant spray 

 later than is usually recommended for scale and similar insects. 



Extra Fine Sulphur. 



How efficient this material would be for scab control, when 

 applied to apple trees in the manner described in this publica- 

 tion, during a season in which the disease is particularly severe, 

 cannot be predicted from the experience with it during the 

 past two seasons. That it possesses very evident fungicidal 

 properties is shown by the fact that scab on the fruit produced 

 on plot 6, when compared with the check was reduced from 

 5 per cent to a little more than one-half of one per cent. 



