Poisoned Baits. The use of arsenicals either as a spray 

 or iii the dust form is to be recommended then, in the ma- 

 jority of cases where the injury is distinctly caused by some 

 leaf or twig eating insect with biting mouth parts. There 

 are, however, exceptional cases where neither the dusting 

 nor the spraying method will answer the purpose satis- 

 factorily. This is especially true where so-called "cut-' 

 worms," larvae of certain moths, are causing the damage; 

 When our problem is the control of these insects in vege- 

 table patches or truck gardens, then the most satisfactory 

 results will be obtained by what are known as "poisoned 

 baits." These depend for their killing principle upon eith- 

 er ordinary white arsenic or upon some one of the arseni- 

 cal compounds as Paris green, London purple, or lead ar- 

 senate mixed with or put upon some food that is especially 

 liked by the insects in question. 



A quite effective poisoned bait may be made by dipping 

 succulent leaves, such as cabbage leaves, in water in which 

 either arsenic or some arsenic compound has been placed. 

 The amount of the arsenical used may vary quite largely 

 and the result still be satisfactory. 



The writer has found the following proportions effective : 

 One quarter pound white arsenic, or one half pound Paris 

 green, to five gallons of water. The mixture should be 

 kept well stirred and the leaves to be poisoned dipped in it. 

 These leaves should then be placed on the ground near the 

 plants to be protected. The work should preferably be 

 done in the late afternoon for usually cut-worms feed in 

 the evening and at night, and the bait will be more attrac- 

 tive to them when fresh. When such succulent leaves are 

 easily obtained in quantity, the method above outlined is 

 recommended. 



In many instances, however, such leaves cannot be ob- 

 tained and when this is the case a poisoned bait made as 

 follows will be found to be thoroughly satisfactory: 



Bran 40 pounds 



Molasses 2 or 3 gallons 



Arsenic (powdered white) 3 pound* 



