228 Peach-Growing 



the egg from which it hatched or migrate some distance, 

 frequently going below the surface of the soil, especially 

 if it is light or gravelly, and then eating its way into a root. 

 They live usually below the surface of the ground, but may 

 occur in the trunks or larger limbs. 



Since the eggs hatch and the borers enter the trees during 

 a period of several months, the size of the larvae in a tree 

 at any particular time varies accordingly. 



Methods of control of California borer. 



As in the case of the eastern species, the only effective 

 method of control is "worming," that is, digging out the 

 borers. This is usually performed in the Santa Clara 

 Valley in the winter or spring months, or it may be done 

 in the fall in the manner described for the eastern species. 



The application in May or June before the moths begin 

 to fly of a repellent wash termed a "lime-crude-oil-mixture" 

 is recommended as being of more or less value. It is made 

 as follows : " Place about 50 pounds of rock lime in a barrel 

 and slake with 10 or 15 gallons of warm w^ater; while the 

 lime is boiling slowly pour in 6 or 8 gallons of heavy crude 

 oil, and stir thoroughly. Add enough water to make the 

 whole a heavy paste." This wash should be applied as 

 soon as made, using a heavy brush for the purpose. 



Fruit-tree bark-beetle, or shot-hole borer {Scolytus 

 rugulosus) 



In his account of this insect from which the following notes 

 are taken. Brooks^ says: "The shot-hole borers or bark- 

 beetles burrow into the bark and slightly into the wood 

 1 Farmers' BuU. 763. 



