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Author Polivka, Karl M., 1971- author.

Title Environmental persistence of a pathogen used in microbial insect control / Karl M. Polivka, Greg Dwyer, and Constance J. Mehmel.

Publication Info. Portland, OR : United States Department of Agriculture, Forest Service, Pacific Northwest Research Station, January 2017.


Location Call No. OPAC Message Status
 Axe Federal Documents Online  A 13.79:PNW-RN-573    ---  Available
Description 1 online resource (12 pages).
text txt rdacontent
computer c rdamedia
online resource cr rdacarrier
Series Research note ; PNW-RN-573
Research note PNW ; 573.
Summary We conducted an experimental study of infection, transmission, and persistence of a nucleopolyhedrovirus (NPV) of Douglas-fir tussock moth (Orgyia pseudotsugata) to better understand mechanisms determining the efficacy of the virus when it is used as a microbial control agent. In a field experiment, we quantified infection rates of larvae exposed to either Tussock Moth Biocontrol-1, the strain currently used for control by the U.S. Forest Service, or a wild-type strain isolated from a natural population. We first allowed each pathogen to decay on experimental branches for 0, 1, or 3 days before allowing uninfected larvae to feed on the branches, and then we fit both a generalized linear model and an epidemiological model of virus transmission to the infection data. Longer decay of the NPV resulted in lower infection rates, but evidence that overall virus transmission differed between wild and pesticide isolates of NPV was weak. The short persistence time of the virus suggests that it does not last long on foliage, in turn suggesting that application of TM Biocontrol-1 must be carefully timed to ensure maximum mortality.
Note Online resource, PDF version; title from caption (viewed February 22, 2017).
Bibliography Includes bibliographical references (pages 10-12).
Subject Douglas fir tussock moth -- Biological control.
Douglas fir tussock moth -- Viruses.
Genre/Form Online resources.
Electronic books.
Electronic government information.
Added Author Dwyer, Greg, author.
Mehmel, Constance J., author.
Pacific Northwest Research Station (Portland, Or.), issuing body.
Other Form: Print version: Polivka, Karl M., 1971- Environmental persistence of a pathogen used in microbial insect control (OCoLC)973925851
Gpo Item No. 0083-B-46 (online)
Sudoc No. A 13.79:PNW-RN-573

Available items only