The essential features of controlling this new pest will be 

 repeated here, criiefly because I shall subsequently show that 

 I had similar means described years ago, and because the es- 

 sential idea, with modifications, makes possible the effective 

 control of a number of other important cereal-and forage 

 crop pests. 



The European corn borer is a moth that develops ''at 

 least two generations annually" in Massachusetts. In the 

 case of this insect a female moth emerging in the spring, lays 

 on the average 350 eggs, and a female of the second brood, 

 emerging in July, 550. These eggs are laid in patches of from 

 5 to 50 on the underside of the leaves, and the hatching young 

 in a few days after feeding upon the surface of the leaves 

 enter the plant to develop therein to a moth. 



As for natural means of control, "very few are destroyed 

 by them" (Farm Bui. No. 1046, p. 2). It will readily be 

 seen then, that mere destruction, usually by burning, of its 

 host plants, \vhich is to include "the stubble and upper part 

 of the root," and which host plants include, on suspicion, 

 practically every plant of herbaceous growth such as annual 

 weeds, is necessarily inadequate, no matter at what cost in 

 money and loss of fertility and loss of waterholding power of 

 the soil it may be carried out, to prevent the survival of a 

 considerable percentage of larvae, and consequently is sure to 

 result in heavy loss the following year. 



The means of control devised by me, take advantage of 

 the fact that the moths prefer to oviposit on corn bearing a 

 tassel, or just coming into the tassel stage. Most of the corn 



