24 



of the plant as nearlj^ as possible. The poisons should be distributed 

 much more generally over the plant than is necessar}^ for the cotton 

 caterpillar. 



Of the modes of applying the poison little need be said. The gen- 

 eral use of poisons against the cotton caterpillar has familiarized most 

 planters with the details of this work. In point of convenience the 

 dusting method is to be recommended. If an abundance of water is 

 at hand, suitable spraying machinery may be used. The amount of 

 poison used in the dusting method will be greater than that required 

 to poison an equal area by spra3"ing, ])ut in dusting there will be a 

 saving in labor and machinerj^', and what is more important, the work 

 may be done more rapidl3^ The question of how to apply the poisons 

 most economically, and in a way to secure the best results, should be 

 settled by each planter according to his conditions. If the work be 

 done with sprajdng machinerj^, a poison, such as Paris green, should 

 be used at the rate of 1 pound to every 50 gallons of water, and if the 

 dusting method is adopted, from 2 to 3 jDounds will be required per 

 acre for each application. 



In conclusion, attention should be called to the entire practica- 

 bility of the methods recommended. The}^ may be used singly, or any 

 two may be emploj^ed, as the early planting of earl}^ varieties, supple- 

 mented by the use of poisons or trap crops; or all three mav be 

 employed in conjunction, and, if properly managed, should give a 

 large degree of freedom from boUworm injury. 



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