196 



ENEMIES OF THE APPLE, PEAR, AND QUINCE 



Apple Borers.— The apple tree is attacked by several borers. 

 The most common of these is the so-called flat headed apple tree 

 borer, which is the larva of a buprestid beetle. The larva lives in 

 the tree about two years and burrows chiefly in the sap wood and 



a\7: >,-::x-j. 



Fig. 120. — Three stages for spraying apple and pear trees. 1, winter buds open, spray 

 ' for scab, aphids, and bud moth. 2, pink or pre-blossom, spray for scab, bud moth, and leaf 

 roller. 3, calyx spray for scab and codling moth. (Oregon Station.) 



Fig. 121. — Two conditions of the apple or pear when a spray would not be applied. 

 When blossoms are open pollen and bees would be injured. Just after the calyx cups have 

 closed and the stems are hanging down a poison cannot enter the cups for codling moth. 



green bark. As it girdles around the tree it causes much damage 

 and trees are often killed when attacked by several borers. 



Another common apple tree borer is the so-called round headed 

 borer, which is the larva of a beautiful long-horned beetle (Fig.122). 

 It lives in the trunk of the tree about three years and burrows in 

 the heart wood as well as in the sap wood. 



