00000nam 2200000zi 4500 9.909054 CaOODSP 20221107181819 m o d f cr cn||||||||| 220314t20212021oncdo ob f000 0 eng d 9780660251841 9780660251858 CaOODSP eng rda CaOODSP n-cn--- Fo123-1/118E-PDF Fo123-1/118E Sampling techniques to detect canopy infestations of the hemlock woolly adelgid. Sault Ste. Marie, Ontario, Canada : Canadian Forest Service, The Great Lakes Forestry Centre, [2021] ©2021 1 online resource (4 unnumbered pages) : graphs, photographs. text txt rdacontent computer c rdamedia online resource cr rdacarrier Frontline, forestry research applications. Technical note, 1717-6980 ; 118 Caption title. Incorrect ISBN (9780660251841) printed in this publication. Issued also in French under title: Techniques d'échantillonnage pour détecter les infestations de la canopée par le puceron lanigère de la pruche. Includes bibliographical references. "The Great Lakes Forestry Centre (GLFC) has developed two early-detection sampling techniques: ball sampling and sticky trapping that detect canopy infestations of the non-native hemlock woolly adelgid (Adelges tsugae Annand) (HWA). This insect invaded Canada in the provinces of Nova Scotia (2017) and Ontario (2013) and is killing eastern hemlock, an important ecological foundation species. Hemlock stands greatly moderate temperature and intercept precipitation, which allows several wildlife species to flourish during critical times of the year. In order to manage HWA effectively, it is important to detect populations when they are small and before they begin to kill trees. This note describes how these two techniques are used to detect a small or newly established population of HWA in a hemlock stand. We define a small population as one where approximately 2% or more of the twigs have HWA or 2% or more of the hemlock trees in a stand are infested with HWA"--Introduction. Hemlock woolly adelgid Canada. Tsuga Diseases and pests Monitoring Canada. Great Lakes Forestry Centre, issuing body. Techniques d'échantillonnage pour détecter les infestations de la canopée par le puceron lanigère de la pruche. (CaOODSP)9.909057 Frontline, forestry research applications. Technical note, 1717-6980 ; 118. (CaOODSP)9.504873 PDF 728 KB https://publications.gc.ca/collections/collection_2022/rncan-nrcan/Fo123-1-118-eng.pdf