144 Bulletin 142. 



in Oregon indicate that a few of the worms of these later broods can 

 be reached with the spray, and apparently enough of them to lead the 

 experimenter to conclude that even six or seven applications can be 

 made with profit. However, it is the unanimous conclusion of experi- 

 menters here in the eastern portion of the United States, where there 

 are only two broods or less of the insect in a year, that two appli- 

 cations are sufficient, one just after the petals fall and a second a 

 week later. No definite date can be set for spraying for the pest, as 

 the falling of the blossoms will vary from year to year in the same 

 orchard. 



The important thing for the fruit-grower to do is to watch the 

 blossoming of his trees and the developing of the young fruit, and not 

 depend on anything or anybody else. Simply see to it that there is a 

 good dose of poison put into each blossom-end, and that it is not 

 washed out by rains before nature gets it protected with the closed 

 calyx lobes. 



Hoiv to spray for codlmg-Jiioth. — Thousands of fruit-growers annually 

 go through the operation of spraying their orchards, and yet many 

 of them simply waste their time and money, for they only half do it. 

 Every one who sprays, or is thinking about doing so, should read and 

 re-read Professor Bailey's " Notions about the Spraying of Trees" 

 (Bulletin 101 of this Station). 



As most of those who have sprayed for this insect have not 

 thoroughly understood the necessity for filling the blossom- end with 

 the poison, there is but little definite evidence as to just how this can 

 best be done. Mr. Card, in Nebraska, has recorded the following 

 pertinent suggestions on this point : " By following the sprayer, I 

 found that ordinarily we do not get the calyx thoroughly drenched. 

 For this reason the spray was made coarser than heretofore, and this 

 seemed to work better, particularly when applied with considerable 

 force. It appeared to be easier to get the poison into the cavity when 

 the lobes were wide open (see figure 145) than when they had begun 

 to close (see figure 146), making a vase-formed receptacle. The 

 leaves increase in size very rapidly after the blossoms fall, so on this 

 account the sooner the spraying is done the more thorough it is likely 

 to be. Were there no danger that the poison would be washed out 

 by rains, the best time to apply it would be immediately after the 



