36 MAINE AGRICULTURAL EXPERIMENT STATION. 



REMEDIAL MEASURES. 



Arsenical sprays applied early in the season will satisfactorily 

 dispose of this pest and for orchard or shade trees protected 

 in this manner no other means are necessary. It is their cus- 

 tom to congregate in great masses on the trunks of the trees 

 while they molt their skins. Here they may be destroyed by a 

 stiff broom dipped in kerosene or swept into a pail of water 

 and kerosene. 



When not congregated for molting the older caterpillars when 

 not feeding stretch out motionless along the branches or trunk 

 and are difficult to see, especially as they are likely to choose 

 the upper side of the branch. 



However, it is not necessary to wait for the molting periods 

 in order to combat the older caterpillars on trees which have 

 not been protected by spraying. These caterpillars drop down- 

 ward when disturbed. This habit leads to the suggestion that 

 by a combination of jaring and banding much injury may be 

 prevented. After the caterpillars are jarred from the tree the 

 trunks of trees are painted with a band of "tanglefoot" such as 

 is used against the gypsy caterpillar to prevent their ascending. 



The egg-rings can be removed and burned at pruning time as 

 they are easy to see. 



Fig. 16. Forest Tent Caterpillar. (From Me. Ag. Ex. Sta, Circular). 



Brown-Tail Moth. 

 (Euproctis chrysorrhcea.) 



The caterpillars of the brown-tail moth are capable of ruin- 

 ing orchard, shade and many woodland trees. They are also a 

 dreaded nuisance because the caterpillar hairs break off, and 

 on coming in contact with the human skin, cause extreme irri- 

 tation and often illness. 



