Past and present outbreaks of the balsam fir sawfly in western Newfoundland: An analytical review |
| |
| Institution: | 1. National Center for Agricultural Utilization Research (NCAUR), United States Department of Agriculture–Agricultural Research Service (USDA–ARS), Peoria, IL 61604, United States;2. Department of Plant Pathology, The Ohio State University, Columbus, OH 43210, United States;3. Department of Plant Pathology, The Ohio State University/OARDC, Wooster, OH 44691, United States;1. University of Florida, Southwest Florida Research and Education Center, 2685 SR 29 N, Immokalee, FL 34142, USA;2. LeOra Software Company, 1007 B St., Petaluma, CA 94952, USA;1. Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo (ESALQ/USP), Av. Pádua Dias, 11, Piracicaba, 13418-900, São Paulo, Brazil;2. Estação Experimental de Citricultura de Bebedouro, Rodovia Brigadeiro Faria Lima, km 384, Bebedouro, São Paulo, Brazil;3. Centro APTA Citros Sylvio Moreira, Rodovia Anhanguera km 158, Cordeirópolis, São Paulo, Brazil;4. Unidad de Biotecnología, Estación Experimental Wilson Ferreira Aldunate, INIA Las Brujas Dirección: km 10 de la Ruta 48, Rincón del Colorado, Uruguay;1. Agronomy Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran;2. Irrigation and Drainage Engineering Department, Tarbiat Modares University, Tehran, Iran;2. Tianjin Agricultural University, No. 22 Jinjin Road, Xiqing District, Tianjin 300384, China;1. Département des sciences biologiques, Université du Québec à Montréal (UQÀM), 141, Avenue du Président-Kennedy, Montréal, Québec H2X 1Y4, Canada;2. Centre d''Étude de la Forêt (CEF), 141, Avenue du Président-Kennedy, Montréal, Québec H2X 1Y4, Canada;3. Great Lakes Forestry Centre (GLFC), Canadian Forest Service (CFS), 1219, Queen Street East, Sault Ste Marie, Ontario P6A 2E5, Canada;4. Ontario Ministry of Natural Resources (OMNR), 1235 Queen Street East, Sault Ste. Marie, Ontario P6A 2E5, Canada |
| |
| Abstract: | Historical data of defoliation and population density were examined to determine whether a sustained outbreak of balsam fir sawfly (Neodiprion abietis Harris) in western Newfoundland, Canada is unprecedented in severity and duration. Results indicate that the current outbreak departs substantially from historical trends, covering a surface area twice the sum of all infestations occurring in the preceding 50 years. The current outbreak is also of longer duration due to a northward expansion of the range usually subjected to severe defoliation by this insect. Time-series analysis indicates that balsam fir sawfly dynamics have a strong second-order component, providing testable hypotheses for future studies investigating the factors responsible for population fluctuations. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
