THIRD ANNUAL REPORT OF STATE ENTOMOLOGIST. 207 



.Spraying so timed as to have the fruit practically well protected at 

 these critical dates. 



THOROUGHNESS IN SPRAYING. 



Satisfactory results in spraying for the codling moth cannot be 

 expected if the work is not done with thoroughness. We believe 

 there are many who have sprayed for years who have not 3^et learn- 

 ed the importance of thoroughness. It is highly desirable that the 

 entire surface of both fruit and leaves be evenly covered. I 



am informed by Mr. H. L. Frost of Boston who does spraying on a 

 very extensive scale that it is his practice to allow his force of men 

 to go over a large number of trees with a power outfit in a some- 

 what hasty way covering the bulk of the surface and that later he 

 sends a smaller number of men with another outfit over the same 

 trees to spray all that was omitted the first time. This he does to 

 save expence and secure thoroughness. The first force of men with 

 a large machine would waste much time in attempting to cover all 

 parts of the trees and the second force of men under instructions to 

 complete the job can be made to do thorough work. 



BANDING FOR THE LARVAE. 



Bands are used to catch scattering caterpillars that have escaped 

 destruction by the poisonous spray. The advisability of their em- 

 ployment depends upon the degree of thoroughness required. 

 Their successful use depends upon having trees that are free, or 

 reasonably so, of other hiding places into which the larvae might go 

 to pupate. Finding no other places the caterpillars crawl under the 

 band thus bringing them all together wdiere they may be readily 

 found and destroyed. We have used and we recommend burlap 

 for banding trees. This may be bought in tlie bolt and cut up into 

 pieces 8 to lo inches wide which when unrolled give long strips of 

 the right width for banding. In Missoula we had the burlap cut into- 

 pieces of this length in a large paper cutter in a newspeper office. 

 The workmen each take one of these rolls and as thev come to the 

 tree to be banded cut ofl:' a piece of sufficient length to go round the 

 trunk or lunb and slightly lap. It is placed tightly against the tree 

 and a string tied to the middle. Then the top edge is pulled down 

 over the string. In examining the band the outer thickness of bur- 



