THE PLUM IN KANSAS. 135 



tinued for a length of time, the tree may be so weakened that the flow 

 of sap will not be strong enough to repel. In snch a case it is not 

 long before the fate of the tree is sealed, unless vigorous and prompt 

 measures are taken for its protection. 



To prevent loss from this insect, the tree should be kept in a healthy 

 condition ; the stronger the tree the better it can resist attack. Trees 

 that are diseased, or are suffering from the attacks of scales or other 

 insects, seem most subject to attack. 



It is a good practice to remove and destroy all dead wood in the 

 orchard, as it furnishes excellent breeding-places for insects and is a 

 source of danger to surrounding trees. 



Badly infested trees should be cut down and burned. In the early 

 spring the trunks of trees liable to attack should be coated with an 

 alkaline wash, consisting of soft soap reduced to the consistency of 

 paint by adding washing-soda dissolved in water. Enough carbolic 

 acid should be added to give a strong repellant odor to the mixture. 

 Apply the wash with a stiff brush. Several applications should be 

 made during the spring and summer. 



