Site Influences on Hylobius congener (Coleoptera: Curculionidae), a Seedling Debarking Weevil of Conifer Plantations in Maine
| Autor: | Mark W. Houseweart, Celeste Welty |
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| Rok vydání: | 1985 |
| Předmět: | |
| Zdroj: | Environmental Entomology. 14:826-833 |
| ISSN: | 1938-2936 0046-225X |
| DOI: | 10.1093/ee/14.6.826 |
| Popis: | Seedling debarking damage in plantations of various conifer species in Maine was found to be caused by Hylobius congener Dalla Torre, Schenkling, and Marshall. H. congener has not been reported in the literature as a pest of living trees. During 1982 and 1983, the influences of duff, slash, intrasite location, stumps, and site preparation methods on seedling debarking damage were investigated and weevil populations at various sites were compared. Debarking damage on black spruce, Picea mariana (Mill.) B.S.P., was lower: 1) when duff was scraped back from seedling bases, 2) in the interior of plantations, and 3) on planting sites prepared by burning in conjunction with either disk-trenching or raking. Damage was not significantly influenced by stumps or by amount or freshness of slash in the plantation. Split-bolt traps and insecticide-treated split-bolt traps were effective in monitoring H. congener adult populations. Weevil populations were highest on sites that had been harvested within the past year. Previous stand type had little detectable influence on weevil populations; population levels were similar on softwood and mixed-wood sites. |
| Databáze: | OpenAIRE |
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