196 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 8 



results are well nigh perfect. I made several close examinations of the trees sprayed 

 with the dry material and the arsenate of lime and from these observations could see 

 no difference in results from adjacent trees sprayed with the standard formula. 



Mr. W. F. D. Batjer, secretary of the Northwest Arkansas Fruit 

 Growers Association, used 50 pounds in his orchard at Rogers, Ark., 

 and under date of November 5, he made the following favorable 

 report on the results: 



I used this material on a block of Bens and Ganos in connection with lime-sulphur 

 for the cluster bud, calyx and ten-day spray; on the rest of my orchard I used arsenate 

 of lead in both dry and paste form. The entire crop was remarkably free from cur- 

 culio and codling moth injury, the arsenate of Hme block showing up fully as well 

 as the balance in this respect. One thing that appealed to me iu using the arsenate 

 of lime was the fact that it did not change the color of the lime-sulphur- solution, 

 leaving it a clear bright yellow, and in my opinion the fruit and fohage iu this block 

 liad a much better and brighter appearance throughout the season than did that 

 in the balance of the orchard. 



Mr. T. W. Ayers, formerly an assistant in the United States Bureau 

 of Plant Industry, used 50 pounds of this poison in an apple orchard 

 at Fort Payne, Ala., during the past season and he has reported that 

 no difference between this material and arsenate of lead could be noted 

 in the control of the codling moth or in their effect on the fruit and 

 foliage. 



Through the cooperation of several park commissions and public 

 tree sprayers we were able to have arsenate of lime tested in New 

 England for the control of shade tree insects, and 2,000 pounds were 

 distributed for this purpose. So far as could be learned from reports 

 received the arsenate of lime had the same killing effect on the gipsy 

 moth and brown-tail moth as the arsenate of lead, and there was no 

 injury to foliage reported. In one report it is stated that oak trees 

 were sprayed with this poison for the control of brown-tail moth 

 and that the killing effect was ^'very good" comparing '^favorably'' 

 with arsenate of lead. Another report shows that it was used on 

 white oak, red oak and chestnut with results about equal to arsenate 

 of lead" and with '^no injury to the foliage. " 



On July 1, 1914, the writer had an opportunity to see the results 

 of one of these experiments on the grounds of the Metropolitan 

 Park Commission near Boston, Mass. A clump of small poplar trees 

 infested with the gipsy moth had been sprayed with arsenate of lime 

 and the ground was well covered with dead caterpillars. There were 

 a few live caterpillars still feeding on the sprayed leaves but no larger 

 per cent than was found on adjacent trees sprayed with arsenate of 

 lead. 



At Hancock, Md., during the past season the writer used arsenate 



