Insects and Insecticides 
Fig. 14.—Peach Twig-borer; twig of peach showing little masses of chewed bark 
above the larval burrows; b, the same enlarged; c, larva in winter burrow, enlarged; d, 
hibernating larya greatly enlarged. (Marlatt, Bulletin 10, N. S. U. S. Dept, of Agr., Div. of 
Entomology.) 
Fig. 15.—Peach Twig and Borer; a, young shoot wilting from attack of borer; b, adult 
larva enlarged; c, chrysalis enlarged; d, tail end of chrysalis showing hooks. (Marlatt, 
Bulletin 10, N. S., U. S. Dep. of Agr., Div. of Entomology. 
easily killed. Winter applications are of very little value in our expe¬ 
rience. 
Kerosene emulsion (to) and soluble oils (12) may be used, but 
are thought not to be quite as effective, and are more likely to cause 
iniury. 
COLQ.EXPT, SIA. 
Fig. 16.—Plums, life-size, showing the punctures and gummy exudations caused by the 
plum gouger. The black specks on the plums represent the punctures which are made 
either for the purpose of taking food or egg-laying. Original in Fourteenth Annual Report 
Colo. Exp. Sta. 
