230 BOARD OF AGRICULTURE. 



body must estimate for liinidelf. I think it does pay : I think 

 it pays to thin apples; and it pays especially to kill all the 

 codling-moths that you can find under any circumstances. 

 The total cost has been not over four hours' labor a week for 

 twelve weeks. In addition to the means here indicated, I 

 would further suggest that an important means of preventing 

 the increase of the codling-moth would be to cut down all 

 the valueless cider-apple-trees in the neighborhood, which now 

 serve only as nurseries for their development. 



I have no further information to give on that point. This 

 completes the list of out-door insects that I projDosed specially 

 to speak of. 



Mr. Ware. With regard to the use of that paper around 

 the tree, do you find that many come down from the top as 

 far as the paper, so that you catch them on top, as well as 

 at the bottom? 



Dr. Fisher. I do not think you can tell from the result 

 on the paper, whether they come from above or below, because 

 they may not stop at the entrance. They may crawl about a 

 good deal before spinning their cocoon. 



Mr. Ware. Do you put that near the ground? 



Dr. Fisher. I put it where it is most convenient, which 

 is about two feet from the ground. 



Mr. Ware. I will inquire, whether if the paper which 

 is put on for the purpose of applying tar or printer's ink to 

 catch the canker-worm was applied in July or August, it would 

 catch the codling-moth in the same way. 



Dr. Fisher. To some extent it might. 



Mr. Ware. When a tree is provided with paper, why 

 would it not be a good way to tar the paper at that time ? 

 If an orchard is provided with paper for protection against 

 the canker-worm, why not do the same thing to protect 

 against the codling-moth? 



Dr. F'iSHER. There is no occasion for employing printer's 

 ink or tar for the worms of the codling-moth. They are after 

 a hiding-place. I think they would hide in the bark above 

 or below, rather than go across the tar. Besides this, at the 

 time we are trapping the codling-moth, the canker-worma 

 are all in the ground, in the pupa stage. It is not theii 

 season. 



Mr. Ware. I have observed other insects, which some- 



