DOI: 10.1016/j.foreco.2012.12.010
Scopus记录号: 2-s2.0-84872840714
论文题名: Relationships between Pikonema alaskensis larval density and shoot growth and production in young black spruce
作者: Johns R.C. ; Leggo J.J. ; MacLean D.A. ; Quiring D.T.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 292 起始页码: 130
结束页码: 138
语种: 英语
英文关键词: Growth loss
; Integrated pest management
; Picea mariana
; Top kill
; Yellowheaded spruce sawfly
Scopus关键词: Black spruce
; Field experiment
; Growth loss
; Herbivory
; In-field
; Injury levels
; Insect pest
; Integrated Pest Management
; Larval density
; Larval feeding
; Picea mariana
; Pikonema alaskensis
; Shoot elongation
; Shoot growth
; Shoot length
; Terminal shoots
; Tree height
; Variable number
; Yellowheaded spruce sawfly
; Pest control
; Forestry
; coniferous forest
; defoliation
; dormancy
; field survey
; growth rate
; herbivory
; injury
; insect
; integrated pest management
; juvenile
; larva
; mortality
; pest damage
; shoot
; Forestry
; Growth
; Pest Control
; Picea
; Picea Mariana
; Atlantic Coast [Canada]
; Atlantic Coast [North America]
; Canada
; Hexapoda
; Hymenoptera
; Picea
; Picea mariana
; Pikonema alaskensis
; Tenthredinidae
英文摘要: Six years of field experiments were carried out to establish relationships between the density of larval yellowheaded spruce sawfly, Pikonema alaskensis (Roh.) (Hymenoptera: Tenthredinidae), and current-year shoot growth and production in juvenile, open-grown black spruce, Picea mariana [Mill.] B.S.P. In manipulative sleeve-cage experiments, larval density explained 36-65% of defoliation on branches and 27-37% of variation in shoot length in the year following defoliation. The negative impact of larval feeding on shoot elongation increased with each year of herbivory, resulting in a nearly 31% reduction in tree height after 5. years of severe (i.e., c. 70% or more) defoliation. Production of current-year shoots was not influenced until 2o years following the initial bout of larval feeding and generally declined each year thereafter. Although a small but variable number of dormant (i.e., epicormic) shoots were produced each year, there was no apparent association with defoliation intensity. In field surveys, egg, mid-instar, and late-instar larval density explained, respectively 8%, 18%, and 33% of variation in shoot length growth in the following year. Despite some branches and trees sustaining multiple years of severe defoliation, there were no instances of either terminal shoot mortality or top kill (i.e., upper stem and branch mortality). Our study provides essential insect density-defoliation and defoliation-damage relationships for P. alaskensis in black spruce that may aid in establishing the first economic injury level for this destructive insect pest in Atlantic Canada. © 2012. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66726
Appears in Collections: 影响、适应和脆弱性
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作者单位: Natural Resources Canada, Canadian Forest Service - Atlantic Forestry Centre, Fredericton, NB, E3B 5P7, Canada; Population Ecology Group, Faculty of Forestry and Environmental Management, University of New Brunswick, Fredericton, NB, E3B 5A3, Canada; Centre for Learning Design and Development, Athabasca University, Athabasca, AB, T9S 3A3, Canada
Recommended Citation:
Johns R.C.,Leggo J.J.,MacLean D.A.,et al. Relationships between Pikonema alaskensis larval density and shoot growth and production in young black spruce[J]. Forest Ecology and Management,2013-01-01,292