Pacific Southwest

Title: Ohia forest decline: its spread and severity in Hawaii

Author: Petteys, Edwin Q. P.; Burgan, Robert E.; Nelson, Robert E.;

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

Station ID: RP-PSW-105

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.

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

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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.