CUTWORMS 



477 



is light hand-picking may be the most practical. It is usually 

 advisable to begin early, before the worms become abundant. It is 

 often necessary, too, late in the season, after spraying is stopped. 

 Arsenate of lead paste used at the rate of four pounds to fifty gallons 

 of water makes an effective spray. However, it is more practical to 

 use the powdered arsenate of lead in a dust form. Mr. A. C. 

 Morgan, of the U. S. Bureau of Entomology, finds that this can be 



FIG. 203. The Northern Tobacco Worm or Horn Worm, (a) moth; (6) larva; (c) 

 pupa (after Howard). The tobacco worms appear in large numbers during certain years. 

 Several methods may be practised to control the pests. (Wisconsin Bulletin 237.) 



applied best when mixed with equal part of sifted wood ashes. This 

 must be applied with a powerful dust gun and when it is calm. 

 Three and a half to five pounds of arsenate of lead per acre are thus 

 used. The arsenate of lead sticks better than Paris green and does 

 not injure the tobacco, while Paris green is lial>lo to do so. Fall 

 plowing helps in the control of the horn worm. 



Cutworms. The cutworm often makes it hard to get a stand 



