The Bulletin. 39 



It is important to adopt some method by which the poison can be 

 quickly ancT economically applied, else the application would not pay. 

 A homemade apparatus for dusting cotton plants is shown in Fig. 16. 

 This apparatus is described by Prof. K. I. Smith* as follows : 



Fig. 16.— Apparatus for dusting cotton plants with Paris Green by hand. 



(After R. I. Smith.) 



"The dusting apparatus is made from a one-inch board, four and a half feet 

 long and three inches wide, by boring an inch and a half auger-hole five inches 

 from each end, and attaching under each hole a sack five inches wide by about 

 fifteen inches long. These sacks can be made from unstarched sheeting run- 

 ning about four pounds to the yard. If it is found that the poison is being 

 applied too fast or too slow the proportion of lime (or flour) and Paris Green 

 must be changed, so that the required amount of actual poison will be applied 

 per acre." 



Figure 17 shows this apparatus in actual use, and it will be ob- 

 served that as the laborer walks along, swinging and shaking the- 

 duster, a cloud of the lime and green is shaken from the sacks 

 and is wafted about in the air so as to settle on all parts of the 

 cotton plants. By the use of such an apparatus (which costs prac- 

 tically nothing to make) a good laborer can treat cotton very rapidly. 

 If favored by a very light breeze it would not be necessary to walk 

 between every two rows, but every second middle (or every third or 

 fourth middle) can be traveled, shaking the duster continually. 

 While such a treatment cannot destroy all the Boll-worms on the cot- 

 ton, yet if given at the right time (about August 1st to 10th) it will 

 kill so many of the young worms as to greatly reduce their injuries. 



"Bulletin No. 16, Georgia State Board of Entomology, April, 1905 "Cotton Boll-wormin Georgia." 



