Pacific Southwest Research Station

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Title: Effects of sevin-4-oil, dimilin, and orthene on forest birds in northeastern Oregon

Author: Richmond, Merle L.; Henny, Charles J.; Floyd, Randy L.; Mannan, William R.; Finch, Deborah M.; DeWeese, Lawrence R.

Date: 1979

Source: Res. Paper PSW-RP-148, Berkeley, CA: U.S. Department Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 25 p

Station ID: RP-PSW-148

Description: The possible harmful effect of insecticides on nontarget organisms should be a prominent concern in all attempts to control forest pests. Although all wildlife must be considered, birds are particularly vulnerable. The study reported here was part of the effort to find an environmentally safe method to control one of the major sources of insect damage to forest trees - the Douglas-fir tussock moth (Orgyia pseudotsugata [McDunnough]). Its larval stage is an important defoliator of true firs (Abies sp.) and Douglas-fir (Pseudotsuga menziesii var. glauca [Beissn.] Franco)in western North America. In Oregon, severe infestations have recurred at intervals of about 10 years since 1936 (Wickman and others 1973).

Key Words: Sevin-4-Oil (carbaryl), Orthene (acephate), Dimilin (diflubenzuron), forest birds, brain cholinesterase

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Richmond, Merle L.; Henny, Charles J.; Floyd, Randy L.; Mannan, William R.; Finch, Deborah M.; DeWeese, Lawrence R.  1979.  Effects of sevin-4-oil, dimilin, and orthene on forest birds in northeastern Oregon  Res. Paper PSW-RP-148, Berkeley, CA: U.S. Department Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 25 p .