Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

 Due to a lapse in federal funding, this USDA website will not be actively updated. Once funding has been reestablished, online operations will continue.

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Ronald C. Wilkinson
    Date: 1975
    Source: Res. Pap. NE-326. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5p.
    Publication Series: Research Paper (RP)
    Station: Northeastern Research Station
    PDF: View PDF  (733.98 KB)


    Spraying 16-year-old eastern white pine (Pinus strobus L.) growing in a geographic seed-source test plantation with 10-percent silicone antitranspirant emulsion effectively increased internal water balance during the growing season when compared to control trees of the same seed sources that received no treatment. Extreme silicone toxicity was observed. Apical shoot elongation of treated trees averaged 37 percent of that of controls. Needle elongation of treated trees was also restricted. All of the treated trees were attacked by the white-pine weevil (Pissodes strobi Peck.), and leader mortality due to attack occurred in 90 percent of the trees. Only 51 percent of the control trees were attacked, and only 26 percent leader mortality occurred. High leader mortality in treated trees may have been due to increased egg production by female weevils in the moisture-favorable environment. The high numbers of treated trees attacked suggests that the antitranspirant may have initiated release of some unknown attractants of the host or directly or indirectly stimulated release of aggregating pheromone by the weevil.

    Publication Notes

    • Check the Northern Research Station web site to request a printed copy of this publication.
    • Our on-line publications are scanned and captured using Adobe Acrobat.
    • During the capture process some typographical errors may occur.
    • Please contact Sharon Hobrla, if you notice any errors which make this publication unusable.
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Wilkinson, Ronald C. 1975. Silicone antitranspirant increases susceptibility of eastern white pine to the white pine weevil. Res. Pap. NE-326. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5p.

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page