Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . h a substance is heavy-crude oil. In 1902 Mr. D, B. Pickering, of Santa Clara, applied heavy crude oilof an asphalt base, an oil of from 14° to 16° Beaume, to the trunks ofhis trees which contained borers, and the result was so gratifying thatthe next season he extended his experiments and induced some of hisneighbors to follow his method. Mr. Pickerings method is as follows:Remove the earth from around the trees to the larger roots and scrapeoff all clinging material, such as g
Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . h a substance is heavy-crude oil. In 1902 Mr. D, B. Pickering, of Santa Clara, applied heavy crude oilof an asphalt base, an oil of from 14° to 16° Beaume, to the trunks ofhis trees which contained borers, and the result was so gratifying thatthe next season he extended his experiments and induced some of hisneighbors to follow his method. Mr. Pickerings method is as follows:Remove the earth from around the trees to the larger roots and scrapeoff all clinging material, such as gum, borings, and clinging earth, itbeing necessary to open all channels where borers are located, whichare usually clogged by these substances. As soon as the trunk andexposed roots are thoroughly cleaned, a heavy coat of oil is appliedwith a paint brush as high up as the ground level and the trench leftopen for a few days, when the earth can be replaced. The fumes of theoil will enter the opened channels and drive the borers out, and comingin contact with the oil, they will soon perish. In order to avoid any. a. Female. ^^^^^H^^H^^B^b ^- Male e. 9. Peach-root Borer (Sanninoidea opalescens). possible injury to the tree by the application of this remedy, it has beendeemed wise never to bring the oil above the surface, so as to preventthe sun from driving it into the bark. It is well to paint the trunkabove the ground with lime and crude oil mixed as follows: Slake 50pounds of lime, and while slaking pour in from 2^ to 3 gallons of heavycrude oil, with enough water added to make a thick paste, like white-wash. Another very good substance is made as follows: Slake 50pounds of lime, and while slaking pour in from 1^ to 2 gallons of gas 12 pounds of whale-oil soap and add this to the lime and tarsolution, making the whole into a thick whitewash by adding a little waterat a time and stirring constantly. These applications will prevent theyoung borer from ente
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