142 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 2 



'all of vou who have had experience with power sprayers will agree 



ft. 



with me in this respect. 



As to the value of early sprays, Mr. Sanderson has mentioned con- 

 trolling the Codling' ]\Ioth by omitting the first spray. I am certainly 

 of the opinion that the western people have the right idea in placing 

 great value and importance on the first spray, the one given immedi- 

 ately following the dropping of the petals. This year I applied the 

 methods followed in the West in an apple orchard of about 1.500 trees 

 in the Ozarks. I applied three sprays, the first of which I gave im- 

 mediately following the dropping of the petals, but before the calyx 

 lobes had closed, in a drenching spray. I applied two lighter sprays, 

 using a fine mist, which was used so as to leave a maximum amount 

 of the material coated over the apples. I do not believe, from my 

 experience, that a single spraying will control the Codling Moth in 

 apple orchards where the infestation is severe. I do not think that 

 is possible, from the fact that according to covints made by me w^hile 

 in the western Colorado section they showed that about two thirds of 

 the worms entered the calyx end and about one third at the side of 

 the apple, and any spray applied so as to fill the calyx only, whether 

 in the upper calyx or the lower, would not destroy the 33% that 

 might enter the side of the apple. I think that the better orchardists 

 in the West are coming to this plan of applying the first spray with 

 a heavy drenching spray after the dropping of the petals, and using 

 later a fine mist spray. I produced this year, out of a count of some 

 four thousand apples, only six infested with Codling ]\Ioth, and that 

 was in jNIissouri, a result, I think, which will compare favorably with 

 any shown in the Northwest. After all. if the entomologists of the 

 West and Northwest could come to our meetings and talk this matter 

 over, there would be fewer chances for such differences of opinion as 

 seem to have arisen. 



President Forbes : The next paper on the program is by Mr. E. D. 

 Ball, Logan, Utah. 



IS ARSENICAL SPRAYING KILLING OUR FRUIT TREES? 



By E. D. Ball, Logan. T'tah 



In Bulletin 131 of the Colorado Experiment Station, Dr. Wm. P. 

 Headden comes to some very startling conclusions Avith reference to 

 the effect of continued arsenical spraying on the life of our orchards. 

 As the truth or falsity of these conclusions is a matter of vital and 

 immediate importance to the fruit growers of the West, if not to those 



