232 



STATE BOARD OF AGRICULTURE 



about five-eighths of an inch long attacked sometimes the side of the 

 soft leader and at other times it tunneled up through the center. 



The species -is recorded as webbing spruce cones together and of tun- 

 neling through the cones. Quite a large number of the young Norway 

 spruces in the forestry nursery and others of small size which had re- 

 cently been set, lost their leaders. 



BIRCH LEAP SKELETONIZER. 



{Buculatrix can-adensiella.) 



Til is insect seems to have come to stay for a while. Each year com- 

 plaints come in from resorts in the vicinity of the Cheneaux Islands that 

 the white birches are being defoliated, and these canoe birches play an 

 important part in rendering our northern resorts attractive. We have 

 recommended the application of a spray of arsenate of lead put on in 

 the ordinary way. 



I 



\J^: 'Fig. 13 



-Larva, cocoons and inoltinK shelters of birch-leaf skeletonizei on baf 



I ;Specknens received during late August and early September showed 

 4mair^':light-green larvae, less than one-fourth inch long, which skele- 

 tonize tlie leaves. There are also present very small white silken shelt- 

 ers useil by the larvae during molting, and also ribbed copper-brown 

 cocoons in which are the pupae. The winter is passed in the cocoon. 

 The infestation seems to be spreading. 



During the year of 1922-23 the European corn-borer has progressed 

 very slowly. It is at the present writing confined to very small areas, 

 no extensive new areas having been discovered. 

 • The garden web-worm {Loxostege similalis) continues its depredations 



