Appendix. 147 



reached the acme in power-spraying, and look forward confidently to the 

 time when we will do our pumping with the light but powerful storage 

 battery, the latest and most important of all Mr. Edison's inventions, as 

 he declares. 



Hood River apple growers, so far as I know with a single exception, 

 use the arsenite of soda application for the moth and are using a greater 

 proportion of white arsenic than in former years and without injury to 

 foliage. 



The past season I followed this formula: 



Water 1 gallon 



White arsenic 1 pound 



Sal soda 2 pounds 



Boil fifteen minutes or until the liquid is clear. Add an amount of water 

 equal to that evaporated, making one full gallon of arsenite, and use one 

 and one-half pints to fifty gallons of water to which has been added six 

 pounds of fresh slaked lime. This spray has been used for the past four 

 years with average results of ninety to ninety-five per cent of fruit free 

 from the moth. 



In Southern Oregon equally favorable results are obtained, using Paris 

 green and London purple. In Missouri quite a number favor a dry powder 

 claiming that it is easier and more rapidly applied. If you want to test 

 it make a powder composed of ten pounds lime, one pound Paris green, 

 one pound Bordeaux, and apply with a powder-gun when the dew is on 

 the leaves. 



I deduce some conclusions from the past season's spraying. 



Two years ago in a young orchard four years old there was so little 

 fruit that I did not spray it — result, fifty boxes of apples, fully one-half 

 damaged by codling moth. Sprayed same orchard six times last season 

 and gathered over five hundred boxes of fruit. Examined critically four- 

 teen boxes of Grimes' Golden Pippins and found but five wormy apples, the 

 rest in about the same proportion, as near as I could judge. It is safe to 

 say that ninety-nine per cent were not wormy. In a neighbor's young 

 orchard not more than twenty rods distant, no spraying was done; result, 

 over a hundred boxes, nearly three-fourths ruined by the codling moth. 



I conclude from these facts that an orchard can be kept free from the 

 apple moth, even when it is adjacent to other orchards where it abounds. 

 In an older orchard did not fare so well. Ben Davis fully one-fourth 

 wormy. The Ben Davis grows in clusters and so closely that the liquid 

 cannot be forced between apples and the moth improved the opportunity. 



I have two hundred Salome trees which bore too great a harvest in 1900; 

 last year so few that I did not think it would pay to spray them; esti- 

 mated that there would be fifteen bushels on these trees. After gathering 

 my main crop thought I would pick these Salomes, but on examination 

 found scarcely an apple that the moth had not penetrated. Sprayed the 

 adjacent rows and got ninety per cent clean fruit. 



I conclude from this experience that spraying pays. That it is almost 

 impossible to save apples growing in clusters like the Ben Davis and that 

 the codling moth is deficient in taste, so far as this variety is concerned. 



