EFFECTS ARE LASTING 205 



we have left scales undisturbed in some places by our poor 

 spraying. 



4. Let the Wind Uelp.—ln spraying when there is a wind 

 blowing if one will get at just the right angle with his tree he 

 can spray into the tree and wet one side of a branch and then the 

 spray will be blown back onto the other side and so the whole 

 tree is reached quite as thoroughly as though there were no wind 

 blowing and one sprayed from each side. Some men make a 

 practice of spraying one side of their trees with one wind and 

 then waiting a few days and spraying the other side with a wind 



Fio. 88. — Proper condition of apple blossoms for spraying before they open. This is often 

 a very important spraying when scab is troublesome. 



from the opposite direction. This is all right if the winds are 

 accommodating enough to come that way, but even then it takes 

 more time to go through the orchard twice than if it can be done 

 at one operation. In spraying bearing trees of good size some 

 wind is even desirable, as it keeps the leaves in motion and the 

 spray is apt to reach both sides more thoroughly. 



Effects are Lasting. — If the orchardist sprays year after 

 year he is almost certain to find that conditions in the orchard 

 improve from year to year. In other words, the effect of spray- 

 ing is cumulative. We get some of the benefit of our 1913 spray- 



