202 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 12 



L. G. Gentner, Madison, Wisconsin. Did not have an opportunity 

 to test material. 



Arthur Gibson, Ottawa, Canada. Only preliminary cage tests made 

 which do not warrant definite conclusions. 



J. R. Horton, Wichita, Kansas. Mr. Horton used the crude arsen- 

 ious oxide in bait against mature grasshoppers in a wheat field, the first 

 application being made October 7, using at the rate of seven pounds 

 bait per acre. The regulation formula of bran, poison, molasses and 

 lemon fruits was used, the poison and bran at the rate of 1 to 25. This 

 application killed 74 per cent of the grasshoppers. A second applica- 

 tion on the same area October 15, with bait prepared and applied as the 

 first, gave 88 per cent killed, calculating the number of grasshoppers 

 alive after the first poisoning as 100 per cent. The percentage killed 

 by both poisonings was 96.9 per cent and Mr. Horton adds, "almost the 

 only hoppers to be found were dead. " 



Philip Luginbill, Columbia, South Carolina. Did not have an op- 

 portunity to test the material. 



G. I. Reeves, Salt Lake, Utah. According to Mr. Reeves the farm- 

 ers of Utah use arsenious oxide, obtained from the nearby smelters, 

 quite extensively in making poison bran mash. 



D. A. Ricker, Janesville, Wisconsin. In his field tests with poison 

 baits against grasshoppers, Mr. Ricker made comparative tests with 

 Paris green, calcium arsenate and the crude arsenious oxide. He re- 

 ports that he found little choice between Paris green and the crude 

 arsenic as far as effectiveness and rapidity of killing was concerned. 

 Calcium arsenate seemed effective but was a slower acting poison. 



W. B. Turner, Hagerstown, Maryland. Did not have an opportu- 

 nity to test the material. 



T. D. Urbahns, Berkeley, California. For grasshoppers, Mr. Ur- 

 bahns found Paris green and crude arsenious oxide about equally 

 effective. He adds, however, that "the crude arsenious oxide was found 

 more difficult to mix on account of settling to the bottom in the liquid" 

 and that the same difficult}^ is more or less true with white arsenic. 



R. A. Vickery, San Antonio, Texas. Did not have an opportunity to 

 test the material. 



R. L. Webster, Ames, Iowa. The sample was tested by C. A. Burge, 

 County Agricultural Agent at Greenfield, Iowa, who reported to Mr, 

 Webster under date of October 9, 1918, as follows: "In regard to the 

 poison for grasshoppers made with crude arsenious oxide which was 

 used at the farm of H. P. Proctor in this county, Mr. Proctor informed 

 me yesterday that he obtained only fair results. Mr. Proctor thought 

 if the arsenic could be soaked over night in water so as to dissolve the 

 granules the results obtained might be better." 



