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    Author(s): Robert L. Lyon
    Date: 1959
    Source: Res. Note PSW-RN-152. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p
    Publication Series: Research Note (RN)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (289.91 KB)

    Description

    The California flatheaded borer (Melanophila californica Van Dyke) kills an estimated 30 million board-feet of pine timber in California each year. The insect is especially troublesome on ponderosa and Jeffrey pines growing on dry sites, and it has caused serious losses in Jeffrey pine stands on valuable , watershed and recreational lands of southern California. An effective control is needed to prevent such losses. This paper presents the results of tests in which the potential of DDT applied as a foliar spray against the adult borers was studied. The tests showed that control with DDT is possible but not practical because very large amounts of DDT need to be applied to get satisfactory control.

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    Citation

    Lyon, Robert L. 1959. Tests with DDT foliar sprays to control the California flatheaded borer. Res. Note PSW-RN-152. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p

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