CIRCULAR NO. 20. 



the work of one parasite species from 2 per cent to over 30 per cent 

 on weevils in dry hanging .squares. The cutting only took two or 

 three hours and the result was worth while to say the least Our 

 recommendation is, therefore, that whenever possible the weeds alon- 

 the edges of the cotton fields or on useless ground adjoining the field*' 

 be cut early in July and again early in August. There might or might 

 not be parasites in these weeds, but there are many other cultural 

 reasons why the weeds should be cut, and if by so doing the parasites 

 are increased, so much the better. 



All of the foregoing shows what may be done by each planter The 

 results will not be uniform, but in no case can they be entirely 

 negative. 



The work of tie entomologists will necessarily be devoted to at- 

 tempts at introducing new parasites and causing a more general dis- 

 tribution of each parasite species, in devising the best means of so 

 doing, and in obtaining a complete knowledge of these creatures which 

 must be the basis for their practical utilization.At the same time the 

 armer must be counted on to assist nature in controlling the weevil 

 by aplymg such measures as the scientific investigations show to be 

 effective. 



Baton Rouge, La., December 19, 1907. 



