Asymmetric semiochemical-mediated interactions of Monochamus spp. (Coleoptera: Cerambycidae) and associated bark beetles in Portugal and Canada.

IF 1.8 3区 农林科学 Q2 ENTOMOLOGY
Jeremy D Allison, Quentin Guignard, Isabelle Ochoa, Edmundo Sousa, Luis Bonifacio
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Abstract

Some coniferophagous bark and woodboring beetles overlap spatially and temporally in host trees. These larval interactions have been classified as competitive and predatory in favor of the larger and more mobile woodborer larvae. In some bark beetles, larval traits have been reported that facilitate evasion of woodborer larvae. Both bark beetles and woodborers mediate mating on host material with volatile pheromones. Although it is known that some woodborers eavesdrop on bark beetle aggregation pheromones to facilitate host location, it is not known what effect woodborer pheromones have on bark beetles. The pheromone monochamol is used by most Monochamus spp. Dejean and coniferophagous species from this genus co-occur with bark beetles in host tissues. Because of the negative consequences these larval interactions have for bark beetles, we hypothesized that the woodborer pheromone monochamol would inhibit captures of sympatric and synchronic bark beetles to intercept traps baited with their aggregation pheromones and host volatiles. We tested this hypothesis in 2 systems, 1 in Ontario, Canada, and another in Setúbal, Portugal with field trapping experiments. Trap captures of Ips sexdentatus (Boerner) (Coleoptera: Scolytinae), Orthotomicus erosus (Wollaston) (Coleoptera: Scolytinae) (2 bark beetle species captured in Portugal), and Ips pini (Say) (Coleoptera: Scolytinae) (1 bark beetle species captured in Canada) were reduced by the presence of monochamol. These results suggest that an additional evasion mechanism in some bark beetles is the detection of the woodborer pheromone monochamol and subsequent reduced response to aggregation pheromone and host volatiles in the presence of this woodborer pheromone.

葡萄牙和加拿大的褐斑蝉(鞘翅目:Cerambycidae)与相关树皮甲虫的不对称半化学介导的相互作用。
一些针叶树食树皮甲虫和木蠹甲虫在寄主树上有空间和时间上的重叠。这些幼虫之间的相互作用被归类为竞争性和捕食性,有利于体型更大、活动能力更强的木蠹蛾幼虫。据报道,一些树皮甲虫的幼虫特征有助于躲避木蠹蛾幼虫。树皮甲虫和木蠹蛾都会通过挥发性信息素在寄主材料上进行交配。虽然已知一些木蠹蛾会窃听树皮甲虫的聚集信息素以帮助确定寄主位置,但还不知道木蠹蛾的信息素对树皮甲虫有什么影响。德让(Monochamus spp. Dejean)和针叶树食虫属的大多数物种都使用信息素 monochamol,在寄主组织中与树皮甲虫共生。由于这些幼虫的相互作用会对树皮甲虫造成负面影响,我们假设木蠹蛾信息素单色醇会抑制同域和同步树皮甲虫捕获以其聚集信息素和寄主挥发物为诱饵的拦截诱捕器。我们在加拿大安大略省和葡萄牙塞图巴尔的两个系统中通过野外诱捕实验验证了这一假设。诱捕器捕获的 Ips sexdentatus (Boerner) (鞘翅目:鳞甲科)、Orthotomicus erosus (Wollaston) (鞘翅目:鳞甲科)(在葡萄牙捕获的 2 种树皮甲虫)和 Ips pini (Say) (鞘翅目:鳞甲科)(在加拿大捕获的 1 种树皮甲虫)都因单喹喔啉的存在而减少。这些结果表明,某些树皮甲虫的另一种规避机制是检测到木蠹信息素 monochamol,并在存在这种木蠹信息素的情况下降低对聚集信息素和寄主挥发物的反应。
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来源期刊
Environmental Entomology
Environmental Entomology 生物-昆虫学
CiteScore
3.90
自引率
5.90%
发文量
97
审稿时长
3-8 weeks
期刊介绍: Environmental Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes reports on the interaction of insects with the biological, chemical, and physical aspects of their environment. In addition to research papers, Environmental Entomology publishes Reviews, interpretive articles in a Forum section, and Letters to the Editor.
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