^8 THE FOREST TENT CATERPILLAR 



killed by pouring on kerosene. If this method is employed 

 great care should be taken not to add enough to saturate the 

 bark. Many trees have been killed by carelessness in such use 

 of kerosene. 



Banding to Prevent Invasion. In case of an uninfested 

 apple orchard in the vicinity of an infested woodland, it will 

 be advisable to band the apple trees with Raupenleim before 

 the caterpillars are half grown to prevent invasion from them. 



The same advice would hold in case of other uninfested 

 trees in the vicinity of those infested. 



Collecting Cocoons. A large proportion of the cocoons are 

 commonly spun where they can be reached. The destruction 

 of these will lessen the number of moths that lay eggs for the 

 next season's brood of caterpillars, although it will also lead to 

 the destruction of large numbers of parasites. If the cocoons 

 were placed in a good-sized box with coarse-meshed mosquito 

 netting over it the escape of the moths might be prevented 

 while the parasites might get away to continue their good 

 work. By a little trouble the moths remaining in the box 

 could be killed. 



Attracting Moths to Light. Like many other night-flying 

 insects the moths of the Forest Tent Caterpillar are attracted 

 to lights at night. This has led to the suggestion that they 

 may be destroyed by placing a lighted lantern over a tub or 

 other wide vessel containing water with a film of kerosene on 

 top. The moths fluttering about the light will fall into the 

 kerosene and be killed. Such destruction will lessen the num- 

 ber of eggs for next year's brood of caterpillars. 



