DOI: 10.1016/j.foreco.2016.03.044
Scopus记录号: 2-s2.0-84962306067
论文题名: Assessing relationships between tree diameter and long-term persistence of imidacloprid and olefin to optimize imidacloprid treatments on eastern hemlock
作者: Benton E. ; Grant J.F. ; Cowles R. ; Webster J. ; Nichols R. ; Lagalante A. ; Coots C.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 370 起始页码: 12
结束页码: 21
语种: 英语
英文关键词: Dosage
; Hemlock
; Imidacloprid
; Olefin
Scopus关键词: Application programs
; Forestry
; Olefins
; Pest control
; Dosage
; Great Smoky Mountains National Park
; Hemlock
; Hemlock woolly adelgid
; Imidacloprids
; Integrated Pest Management
; Olefin concentration
; Pesticide applications
; Insecticides
; concentration (composition)
; coniferous tree
; diameter
; imidacloprid
; insect
; integrated pest management
; metabolite
; optimization
; persistence
; pest species
; pesticide application
; size
; sustainability
; Great Smoky Mountains National Park
; United States
; Adelges tsugae
; Adelgidae
; Tsuga canadensis
英文摘要: Hemlock woolly adelgid (HWA), Adelges tsugae (Annand), has caused widespread eastern hemlock mortality in the eastern U.S. HWA was first documented in Great Smoky Mountains National Park (GRSM) in 2002. Once documented, GRSM implemented an aggressive integrated pest management (IPM) program. As a part of this IPM strategy, systemic imidacloprid treatments have been widely used to preserve the Park's hemlock resources. A retrospective study was conducted in cooperation with GRSM to examine the long-term effectiveness of imidacloprid treatments on different size hemlock trees. Of particular interest is olefin, a metabolite of imidacloprid, which is greater than 15 times more toxic to HWA than imidacloprid. The concentrations of imidacloprid and olefin were assessed in hemlock branchlets four to seven years post-imidacloprid treatment. Samples were collected from three strata of the canopy from each of four size classes (30, 45, 61, and 76 cm DBH).Imidacloprid and olefin were present in all size classes four to seven years after a single imidacloprid treatment. Hemlocks from the 61 and 76 cm size classes exhibited higher imidacloprid and olefin concentrations than the 45 cm hemlocks when larger hemlocks were given high-dose treatments. When all hemlocks were given low-dose treatments, 61 cm hemlocks had lower concentrations of olefin, but no significant differences in imidacloprid concentrations among size classes were detected. Olefin concentrations were higher in high-dose compared to low-dose treatments in 76 cm hemlocks. A significant linear relationship exists between the concentration of imidacloprid and olefin in individual branchlets.A model was developed to optimize the dose of imidacloprid based on the diameter of hemlock trees. Use of this model will result in smaller (<30 cm) and larger (>63 cm) hemlocks receiving lower doses of imidacloprid with expected HWA suppression numerous years after treatment. Information obtained from this study can assist resource managers in developing and modifying HWA suppression programs to maintain low HWA populations while reducing the amount of imidacloprid applied to individual hemlocks. Optimal pesticide applications based on specific hemlock diameters may result in more environmentally and economically sustainable hemlock management programs. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64936
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Entomology and Plant Pathology, 370 Plant Biotechnology Building, The University of Tennessee, Knoxville, TN, United States; The Connecticut Agricultural Experiment Station, 153 Cook Hill Road, Windsor, CT, United States; Great Smoky Mountains National Park, 107 Park Headquarters Road, Gatlinburg, TN, United States; Department of Chemistry, Villanova University, 800 Lancaster Avenue, Villanova, PA, United States
Recommended Citation:
Benton E.,Grant J.F.,Cowles R.,et al. Assessing relationships between tree diameter and long-term persistence of imidacloprid and olefin to optimize imidacloprid treatments on eastern hemlock[J]. Forest Ecology and Management,2016-01-01,370