AND OTHER INJURIOUS INSECTS OF I907 AND IQOS, 121 



sion before they secrete a scale, and the adults by the use of lime- 

 sulphur washes when the treets are dormant. Conspicuous scales, 

 like the Cottony Maple Scale, when but few in number on a vine or 

 shrub, can be picked off by hand and destroyed. 



Borers can in a measure be kept away by the use of repellant 

 washes (see p. 7) which will stick to the tree, and which should also 

 contain an arsenical poison like arsenate of lead. 



As stated above, the glaring effect of whitewash can be prevented 

 by the use of lamp black or other coloring matter in such washes. 



The intelligent care of trees is a great aid in our battle with the 

 insects. A tree planted in good soil, vigorous and thrifty, well pro- 

 tected from injury, stands a better chance than one not so favored. 

 A shade tree injured by horses driven by thoughtless grocer boys and 

 others, a young tree scarred by a lawn mower, or a large one either 

 murdered by cut-throat linemen in running electric wires, or burnt 

 bv contact with such wires, invites attack, as does also a tree pruned 

 m the wrong way. 



