30 
Colorado Experiment Station 
bark of the lower tnink, crown and larger roots, often killing istmall 
trees by girdling them and damaging larger trees so much they are of 
very little value. The adult is one of the clear winged moths, and may 
be mistaken for a wasp. Besides the peach, this borer infests plum, 
prune, cherry and apricot. See Fig. 20. 
Fig. 20 . —Peach-tree Borer: a, adult female: b. aduF male; c, fub-g-own l-i-va : d, 
female pupa; e, male pupa; f, pupa skin and cocoon. All about natural size. (Marlatt, 
Circular 17, Second Series, U. S. Dept, of Agriculture, Division of Entomology.) 
/ 
Remedies .—Carefully inspect the trees every fall and spring and 
remove all borers with a knife. It may be necessary to remove some 
soil from about the crown to find all borers. Their presence is usually 
indicated by a gummy exudation upon the bark. A shield of paper 
about the trunk from June i to August i, the egg-laying period, will 
aid in keeping the adults from laying eggs upon the bark. Asphaltum 
painted upon the trunks has been used for this purpose, in California 
with some success. See Fig. 21. 
Fig. 21.—Showing a type of tree protector that gives results in controling the peach* 
tree borer. No. 1 shows the protector in place but not sealed to the tree. The adult lays 
her eggs on the trunk of the tree, the small newly hatched borers are unable to penetrate 
the dry tough bark of the tree trunk, so endeavor to crawl to the soil where the bark is 
moist and tender. The cone-shaped protector prevents them from reaching the base of 
the tree, and they soon perish. The protector must be closely sealed to the tree and all 
seams closed. (Loaned by the Scott Tree Protector Co., Baltimore, Md.) 
