78 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 2 



true is it? It was this same excuse that permitted the Pacific coast to 

 have a monopoly of the sulphur lime wash for fifteen years. There 

 are greater differences between the extremes of our Washington or- 

 chards where the one spray has been successful than between an av- 

 erage Washington orchard and one in the Atlantic region. The one 

 spray has been used in Washington at elevations from 90 feet to 3,000 

 feet, with rainfall ranging from six inches to thirt}' inches, and where 

 the codling moth has two broods as well as where it has three. 



An outline of the western method was sent to many horticulturists, 

 practical and official, with the request that it be given a trial. I know 

 of no case east of Colorado where the simple details have been fully 

 carried out. The following tests, however, though given under low- 

 pressure, are suggestive. 



J. C. M. Johnson of New Wilmington, Pennsylvania, sprayed once 

 only, with a power outfit at 80 to 100 pounds pressure, using arsenate 

 of lead. He writes of his results as follows : ' ' The results were ex- 

 cellent. ]\Iy Russets, always before wormy, were beautiful and 

 smooth and without a worm, while a small lot of trees in a field that 

 could not be got at had the same old kind of wormy Russets. My Fal- 

 lowaters showed the same benefit, and the unsprayed ones the same lot 

 of worm holes. The Rambos were equalh^ benefitted. My Baldwins 

 are as near perfection as I ever saw, not a worm. Ben Davis was 

 sprayed with the rest, and has no worms. I consider your advice was 

 w^orth hundreds of dollars to me." 



Mr. P. B. Powell of Clinton, New York, wrote for our spraying di- 

 rections. He tested the single spray on the only, low tree he had, us- 

 ing as much force as he could obtain from his hand pump. The 

 crop of this tree was almost entirely free from worms, while else- 

 where, W'here two less thorough applications were given, his fruit was 

 appreciably injured. 



Mr. J. Etna JBuck had opportunity to test our suggestions for the 

 Virginia experiment station. One coarse and weak spraying directed 

 downward, at a pressure of 100 to 120 pounds, produced 98.81% of 

 worm- free fruit. Two sprayings gave 98.90%. Obviously if one 

 spraying can be made to produce such results it is not economy to give 

 more. And we are economic entomologists. 



