Avoidance of nonhost plants by a bark beetle, Pityogenes bidentatus, in a forest of odors
Avoidance of nonhost plants by a bark beetle, Pityogenes bidentatus, in a forest of odors
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DOI：
10.1007/s00114-004-0520-1
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发表时间：
2004-05-01
影响因子：
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通讯作者：
Birgersson, G
中科院分区：
文献类型：
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作者：
Byers, JA;Zhang, QH;Birgersson, G
皮甲虫，Pityogenes bidentatus（鞘翅目：棘虫科），在北欧的针叶林和落叶混交林中寻找适合它的宿主苏格兰松（Pinus sylvestris）的树枝。我们测试了几种不同的非寄主树木和栖息地中常见的植物的气味（例如，山灰，Sorbus aucuparia；橡树，栎树；沙棘，Frangula alnus；蓝莓，Vaccinium myrtillus；覆盆子，Rubus idaeus；和草，Deschampsia flexuosa）是否会减少树皮甲虫对释放其聚集信息素成分的陷阱的吸引力。这些植物的叶子或树皮中的挥发物大大降低了甲虫对它们的信息素的吸引力。从这些非寄主身上收集并通过GC/MS分析的气味含有单萜类、倍半萜类和“绿叶”醇，其中一些（如1-辛烯-3-醇和-石竹烯）降低了对信息素的吸引力，并引起了触角电反应。在实验室中，甲虫在非寄主的挪威云杉和云杉中繁殖很少，而在其他非寄主的树木中则没有。嗅觉避免不合适的非宿主可能是由于在宿主选择过程中避免错误的优势而进化出来的。
The bark beetle, Pityogenes bidentatus (Coleoptera: Scolytidae), searches in mixed conifer and deciduous forests of northern Europe for suitable branches of its host, Scots pine (Pinus sylvestris). We tested whether odors from several diverse nonhost trees and plants common in the habitat (e.g., mountain ash, Sorbus aucuparia; oak, Quercus robur; alder buckthorn, Frangula alnus; blueberry, Vaccinium myrtillus; raspberry, Rubus idaeus; and grass, Deschampsia flexuosa) would reduce the attraction of the bark beetle to traps releasing its aggregation pheromone components in the field. Volatiles from the leaves or bark of each of these plants significantly reduced the attraction of the beetles to their pheromone. Odors collected from these nonhosts and analyzed by GC/MS contained monoterpenes, sesquiterpenes, and "green-leaf" alcohols, several of which (e.g., 1-octene-3-ol and beta-caryophyllene) reduced the attraction to pheromone in the field and elicited electroantennographic responses. In the laboratory, reproduction by the beetle was marginal in nonhost Norway spruce, Picea abies, and was absent in the other nonhost trees. Olfactory avoidance of unsuitable nonhosts may have evolved due to advantages in avoiding mistakes during host selection.