Derivation of Pheromone-Based Larval Thresholds in Spruce Budworm Accounting for Distance to Defoliated Forest Stands
Spruce budworm, Choristoneura fumiferana Clem. (Lepidoptera: Tortricidae), is the most severe defoliator of Pinaceae in Nearctic boreal forests. Three tools widely used to guide large-scale management decisions (year-to-year defoliation maps; density of overwintering second instars [L2]; number of m...
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| Veröffentlicht in: | Journal of economic entomology 2021-04, Vol.114 (2), p.769-775 |
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| container_title | Journal of economic entomology |
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| creator | Rhainds, Marc DeMerchant, Ian Therrien, Pierre |
| description | Spruce budworm, Choristoneura fumiferana Clem. (Lepidoptera: Tortricidae), is the most severe defoliator of Pinaceae in Nearctic boreal forests. Three tools widely used to guide large-scale management decisions (year-to-year defoliation maps; density of overwintering second instars [L2]; number of males at pheromone traps) were integrated to derive pheromone-based thresholds corresponding to specific intergenerational transitions in larval densities (L2i → L2i+1), taking into account the novel finding that threshold estimates decline with distance to defoliated forest stands (DIST). Estimates of thresholds were highly variable between years, both numerically and in terms of interactive effects of L2i and DIST, which limit their heuristic value. In the context of early intervention strategy (L2i+1 > 6.5 individuals per branch), however, thresholds fluctuated within relatively narrow intervals across wide ranges of L2i and DIST, and values of 40–200 males per trap may thus be used as general guideline. |
| doi_str_mv | 10.1093/jee/toaa275 |
| format | Article |
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(Lepidoptera: Tortricidae), is the most severe defoliator of Pinaceae in Nearctic boreal forests. Three tools widely used to guide large-scale management decisions (year-to-year defoliation maps; density of overwintering second instars [L2]; number of males at pheromone traps) were integrated to derive pheromone-based thresholds corresponding to specific intergenerational transitions in larval densities (L2i → L2i+1), taking into account the novel finding that threshold estimates decline with distance to defoliated forest stands (DIST). Estimates of thresholds were highly variable between years, both numerically and in terms of interactive effects of L2i and DIST, which limit their heuristic value. In the context of early intervention strategy (L2i+1 > 6.5 individuals per branch), however, thresholds fluctuated within relatively narrow intervals across wide ranges of L2i and DIST, and values of 40–200 males per trap may thus be used as general guideline.</description><identifier>ISSN: 0022-0493</identifier><identifier>EISSN: 1938-291X</identifier><identifier>DOI: 10.1093/jee/toaa275</identifier><identifier>PMID: 33532858</identifier><language>eng</language><publisher>US: Entomological Society of America</publisher><subject>boreal forest disturbance ; Boreal forests ; Butterflies & moths ; Defoliation ; Entomology ; eruptive population dynamics ; FOREST ENTOMOLOGY ; Forests ; Instars ; large-scale forest pest management program ; monitoring of forest defoliator ; Overwintering ; Pheromone traps ; Pheromones ; sink-hole population dynamics</subject><ispartof>Journal of economic entomology, 2021-04, Vol.114 (2), p.769-775</ispartof><rights>The Author(s) 2021. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. journals.permissions@oup.com</rights><rights>The Author(s) 2021. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. 2021</rights><rights>The Author(s) 2021. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-b382t-9ef292e3014d352ccd4681100f9741b6590b116808998eaf2913d983fef523a3</citedby><cites>FETCH-LOGICAL-b382t-9ef292e3014d352ccd4681100f9741b6590b116808998eaf2913d983fef523a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,1584,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33532858$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><contributor>Wallin, Kimberly</contributor><creatorcontrib>Rhainds, Marc</creatorcontrib><creatorcontrib>DeMerchant, Ian</creatorcontrib><creatorcontrib>Therrien, Pierre</creatorcontrib><title>Derivation of Pheromone-Based Larval Thresholds in Spruce Budworm Accounting for Distance to Defoliated Forest Stands</title><title>Journal of economic entomology</title><addtitle>J Econ Entomol</addtitle><description>Spruce budworm, Choristoneura fumiferana Clem. (Lepidoptera: Tortricidae), is the most severe defoliator of Pinaceae in Nearctic boreal forests. Three tools widely used to guide large-scale management decisions (year-to-year defoliation maps; density of overwintering second instars [L2]; number of males at pheromone traps) were integrated to derive pheromone-based thresholds corresponding to specific intergenerational transitions in larval densities (L2i → L2i+1), taking into account the novel finding that threshold estimates decline with distance to defoliated forest stands (DIST). Estimates of thresholds were highly variable between years, both numerically and in terms of interactive effects of L2i and DIST, which limit their heuristic value. In the context of early intervention strategy (L2i+1 > 6.5 individuals per branch), however, thresholds fluctuated within relatively narrow intervals across wide ranges of L2i and DIST, and values of 40–200 males per trap may thus be used as general guideline.</description><subject>boreal forest disturbance</subject><subject>Boreal forests</subject><subject>Butterflies & moths</subject><subject>Defoliation</subject><subject>Entomology</subject><subject>eruptive population dynamics</subject><subject>FOREST ENTOMOLOGY</subject><subject>Forests</subject><subject>Instars</subject><subject>large-scale forest pest management program</subject><subject>monitoring of forest defoliator</subject><subject>Overwintering</subject><subject>Pheromone traps</subject><subject>Pheromones</subject><subject>sink-hole population dynamics</subject><issn>0022-0493</issn><issn>1938-291X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNqF0c9LHDEUB_AgLbrannovgYJYZGp-TGaTo7rVCgsW3ENvQ2bmpZtlZt6aTBT_-6bstgcP7SmH9-H7HvkS8oGzL5wZebEBuJjQWjFXB2TGjdSFMPzHGzJjTIiClUYekeMYN4zxSnB2SI6kVFJopWckLSD4Jzt5HCk6-n0NAQccobiyETq6tOHJ9nS1DhDX2HeR-pE-bENqgV6l7hnDQC_bFtM4-fEndRjowsfJjnk-IV2Aw97bKSfdYI6Y6EOedfEdeetsH-H9_j0hq5uvq-tvxfL-9u76clk0UoupMOCEESAZLzupRNt2ZaU5Z8yZecmbShnWcF5ppo3RYDPmsjNaOnBKSCtPyNkudhvwMeX19eBjC31vR8AUa1Hqiqu5EizTT6_oBlMY83G10EJqJUqusjrfqTZgjAFcvQ1-sOGl5qz-XUady6j3ZWT9cZ-ZmgG6v_bP72dwugOYtv9J-ryDjcdczj_tL9swoKU</recordid><startdate>20210413</startdate><enddate>20210413</enddate><creator>Rhainds, Marc</creator><creator>DeMerchant, Ian</creator><creator>Therrien, Pierre</creator><general>Entomological Society of America</general><general>Oxford University Press</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FE</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>LK8</scope><scope>M0S</scope><scope>M1P</scope><scope>M2O</scope><scope>M7P</scope><scope>MBDVC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope><scope>7X8</scope></search><sort><creationdate>20210413</creationdate><title>Derivation of Pheromone-Based Larval Thresholds in Spruce Budworm Accounting for Distance to Defoliated Forest Stands</title><author>Rhainds, Marc ; 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(Lepidoptera: Tortricidae), is the most severe defoliator of Pinaceae in Nearctic boreal forests. Three tools widely used to guide large-scale management decisions (year-to-year defoliation maps; density of overwintering second instars [L2]; number of males at pheromone traps) were integrated to derive pheromone-based thresholds corresponding to specific intergenerational transitions in larval densities (L2i → L2i+1), taking into account the novel finding that threshold estimates decline with distance to defoliated forest stands (DIST). Estimates of thresholds were highly variable between years, both numerically and in terms of interactive effects of L2i and DIST, which limit their heuristic value. In the context of early intervention strategy (L2i+1 > 6.5 individuals per branch), however, thresholds fluctuated within relatively narrow intervals across wide ranges of L2i and DIST, and values of 40–200 males per trap may thus be used as general guideline.</abstract><cop>US</cop><pub>Entomological Society of America</pub><pmid>33532858</pmid><doi>10.1093/jee/toaa275</doi><tpages>7</tpages></addata></record> |
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| ispartof | Journal of economic entomology, 2021-04, Vol.114 (2), p.769-775 |
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| source | Oxford University Press Journals; Alma/SFX Local Collection |
| subjects | boreal forest disturbance Boreal forests Butterflies & moths Defoliation Entomology eruptive population dynamics FOREST ENTOMOLOGY Forests Instars large-scale forest pest management program monitoring of forest defoliator Overwintering Pheromone traps Pheromones sink-hole population dynamics |
| title | Derivation of Pheromone-Based Larval Thresholds in Spruce Budworm Accounting for Distance to Defoliated Forest Stands |
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