Svensson Glenn P, Wang Hong-Lei, Jirle Erling V, Rosenberg Olle, Liblikas Ilme, Chong J Michael, Löfstedt Christer, Anderbrant Olle
1Department of Biology, Lund University, 223 62 Lund, Sweden.
2The Forestry Research Institute of Sweden, Skogforsk, Uppsala, Sweden.
J Pest Sci (2004). 2018;91(2):639-650. doi: 10.1007/s10340-017-0929-x. Epub 2017 Nov 7.
Seed orchards function as the primary source of high-quality seeds for reforestation in many European countries, but their seed yields can be severely reduced due to seed- and cone-feeding insects. We evaluated various parameters of pheromone-based mating disruption for control of the moths and , which are major pests in European seed orchards. We applied different types of pheromone dispensers (rubber septa or wax droplets) at different densities and heights, and with different amounts of active components, covering whole orchards or part of an orchard. The efficacy of the treatment was evaluated by analysing male captures in pheromone-baited assessment traps, and presence of larvae in cones. A dramatic decrease (94-100%) in capture of males in traps occurred in all pheromone-treated plots compared to control plots for both moth species. In contrast, a subsequent reduction in larval numbers in cones was only achieved when wax droplets were used as the dispensing formulation at high density and at the highest pheromone dose tested, and only in half of the trials for each pest species. Electrophysiological recordings using antennae of male indicated elevated pheromone concentrations in a treated plot versus a control plot. Our results show that mating disruption has potential to reduce cone damage in spruce seed orchards caused by and , but optimisation of the technique is required to achieve consistent and efficient population suppression of these pests.
种子园是许多欧洲国家造林优质种子的主要来源，但其种子产量可能会因取食种子和球果的昆虫而大幅降低。我们评估了基于性信息素的交配干扰控制蛾类（欧洲种子园的主要害虫）的各种参数。我们以不同密度、高度，使用不同活性成分含量的不同类型性信息素 dispenser（橡胶隔片或蜡滴），覆盖整个果园或果园的一部分。通过分析性信息素诱捕评估陷阱中的雄蛾捕获量以及球果中的幼虫存在情况来评估处理效果。与对照地块相比，在所有性信息素处理地块中，两种蛾类陷阱中雄蛾的捕获量都大幅下降（94 - 100%）。相比之下，只有当使用蜡滴作为高密度且处于测试的最高性信息素剂量的dispensing制剂时，并且仅在每种害虫物种的一半试验中，球果中幼虫数量才随后减少。使用雄蛾触角的电生理记录表明，处理地块中的性信息素浓度高于对照地块。我们的结果表明，交配干扰有潜力减少云杉种子园中由这些蛾类造成的球果损害，但需要优化该技术以实现对这些害虫的持续有效种群抑制。
