FOURTEENTH ANNUAL MEETING. 



87 



is at work inside. We can cut into the burrow and destroy 

 the borer, or we can insert a few drops of carbon bisulphide 

 and close the mouth of the burrow with clay, wax or soap, 

 whereupon the fumes will permeate the tunnel and kill the 

 borer inside. These borers are more serious in the vicinity 

 of woodlands, where they probably live in some of the native 

 trees. They are apt to be much more serious in sod land 

 than in tilled orchards. 



Apple Aphis. (Aphis pouii Geer. ) 



During- 1903. apple trees throughout the State were 



attacked and considerably injured by a green plant louse that 



was found on the under- sides of the leaves and the new 



growth. This is called the apple aphis. ]\Iany of the new 



The green apples aphis A. pomi. Wing- 

 less viviparous female, enlarged. Antenna, 

 still further enlarged, is shown at left. 



Eggs of green ap- 

 ple aphis as they 

 appear on the twigs 

 in winter. 



shoots were also literally covered by these green plant lice and 

 the growth much checked. In nurseries it was a serious 

 matter, because here the condition and value of the trees 

 depends largely upon the annual growth. The small insects 

 suck out the sap, and do not devour an_\- portion of the tissues. 



