S HA DE i RE E INSECTS 
138. Second—Force the growth in the remaining trees by 
every means available. 
139. Third—Use repellants on the trunk and larger limba 
from the last of June to the middle of August, to prevent the fe- 
males from entering the bark. 
140. Fourth—Keep close watch during July and August for 
the injury of the beetles, as indicated by the falling, wilting or 
dying of the leaves or tender shoots. 
141. Fifth—If these signs of the presence of the beetles are 
found, be on the watch for the first signs of the work of the females 
in entering the bark preparatory to egg laying. 
142. Sixth—lf but a few trees are involved, locate the entrance 
to the brood chambers, usually in cracks or under bark scales, by 
the fine sawdust found in the crack or upon the bark. With a 
small oil can squirt a small amount of gasoline into each of these 
brood chambers. Mr. Bird, of New York, reports treating in this 
way a 40-foot tree infested with 200 to 300 brood galleries in 
three hours’ time and using but a quart of gasoline. 
143. Seventh—Spray the trunk and larger limbs thoroughly 
with 25% kerosene emulsion, using an excess of whale-oil soap. 
To this add “Black Leaf 40” at the rate of one part of the “Black 
Leaf 40” to 400 parts of the diluted emulsion. Care must be 
taken not to get much of this upon the foliage, on account of the 
danger of injuring it or causing it to fall. This application is 
made when the females are making the brood chambers, and be- 
fore the larve penetrate tco far from this chamber. 
144. The following solution is reported as very promising by 
Dr. Felt for use in the same way: 1 gallon soft soap, 1 gallon 
hot water, I pint crude carbolic acid. Mix thoroughly and allow 
to stand over night, when it is ready for use after being diluted 
with eight gallons of cold soft water. 
19. ELM BARK BEETLE 
Family SCOLYTID. Species Eccoptogaster multistriata Marsh 
145. his is an imported species, very similar to the hickory 
bark borer, and promises to cause as serious injury to the elms as 
the latter species does to the hickories. It has been reported frong 
eastern Massachusetts. 
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