8 BULLETIN 88, U. S. DEPARTMENT OF AGRICULTURE. 



First application. — As soon as the petals have fallen, spray the 

 trees with arsenate of lead, using the poison at the rate of 6 pounds 

 to 200 gallons of water. Direct the spray straight into the calyx 

 cups, for which purpose an elbow or crook should be used on the end 

 of the spray rods. In spraying high trees a tower is indispensable, 

 as shown in figure 2. 



Second application. — About two weeks after the falling of the petals 

 spray with arsenate of lead at the rate of 8 pounds to 200 gallons of 

 water. Make an effort to apply this spray before the calyx lobes are 

 more than three-fourths closed, which may be determined by careful 

 examination in the orchard. (See fig. 3.) Direct tins spray, also, as 

 much as possible straight into the calyx cups, and at the same time 

 take care to coat the leaves and fruit. 



Third application. — Eight or nine weeks after the falling of the 

 petals spray again with arsenate of lead at the rate of 8 pounds to 200 

 gallons of water. In this treatment cover the foliage and fruit as 

 uniformly as possible with the poison. 



Subsequent applications. — The three applications specified, if thor- 

 oughly made, should effectively control the codling moth, as shown 

 by the results of experiments herewith reported. If these applica- 

 tions have not been thoroughly made, and it is seen that the codling 

 moth will do considerable injury, additional applications will doubt- 

 less be desirable to check the insect as much as possible. Thorough 

 work, especially in applying the first and second applications, should 

 largely obviate the necessity for more than three treatments. 



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