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    Author(s): Edwin Q. P. Petteys; Robert E. Burgan; Robert E. Nelson
    Date: 1975
    Source: Res. Pap. PSW-105. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 11 p
    Publication Series: Research Paper (RP)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (869 KB)

    Description

    Ohia forest decline–its severity and rate of spread–was studied by aerial photographic techniques on a 197,000-acre (80,000-ha) portion of the island of Hawaii. In 1954, only 300 acres (121 ha) showed signs of severe decline; by 1972, the acreage of severely affected forest had increased to 85,200 acres (34,480 ha). Rate of decline and current severity were related to mean annual precipitation and to elevation. The epidemic is continuing. Some forests on other Hawaiian islands also display decline symptoms.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Petteys, Edwin Q. P.; Burgan, Robert E.; Nelson, Robert E. 1975. Ohia forest decline: its spread and severity in Hawaii. Res. Pap. PSW-105. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 11 p

    Keywords

    ohia decline, forest diseases, epidemics, aerial photography, Hawaii

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