14 



still keeping the proportion between them, in preparing 

 larger or smaller quantities of the wash as may be needed. 

 In general it is better to spray the wash while it is still 



Fig. 2. 



warm or quite hot. It works easier in the pump and by 

 the time the spray reaches the tree it is cooled so that 

 there is no danger of its doing injury. It is generally con- 

 sidered as desirable to use the wash upon the day it is 

 prepared but this does not seem to be absolutely neces- 

 sary. Undiluted wash standing till cold will crystalize 

 jut the crystals may be again dissolved by reheating 

 thoroughly and the wash is then probably just as good for 

 use as ever. 



Spraying Outfit. — While it is possible to apply the 

 wash by painting or swabbing it onto the trunks and lar- 

 ger branches, the smaller branches and twigs cannot be 

 thoroughly treated in this way and this method of appli- 

 cation is so wasteful of time and materials that it will 

 be found more economical as well as efficient to do the 

 work with a "bucket pump" such as may be bought for 

 about $6.00. This may serve fairly for the treatment of 

 from 25 to 50 trees if they are small but for large trees, 



