The brown marmorated stink bug Halyomorpha halys, an invasive species native to East Asia, is now present and abundant on soybean throughout Europe where it has become a major pest damaging the crop. Because a better understanding of the impact of H. halys is crucial to implement effective and sustainable pest management, the present study aimed to assess the stages at which soybean is most susceptible to H. halys attacks, and the qualitative and quantitative alterations caused by its feeding on soybean seeds. Therefore, soybean plants were exposed to stink bug adults for 2 weeks at different development stages and were examined at harvest for damage. Stay-green syndrome occurred most severely as a result of H. halys attacks at soybean development stages R4-R5. In the same period, the bug feeding activity significantly reduced the number of seeds per pod, thus indicating a higher damage rate at the R4-R5 stage when soybean surveillance should be intensified in order to properly target pest management strategies. The lower number of seeds per pod corresponded to an increase in the seed weight due to plant compensation mechanisms, leading to grain yields that did not differ in relation to the time of attack or the rate of damaged seeds. However, while not causing overall a loss of weight production, H. halys attacks were shown to cause qualitative damage to soybean seeds, especially by altering protein content and mobilizing several primary metabolites from storage macromolecules, which will have to be considered depending on the intended use of the production.

中文翻译：

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Halyomorpha halys （Hemiptera： Pentatomidae） 对大豆作物不同生育阶段造成的定量和定性损伤


棕色盔甲臭虫 Halyomorpha halys 是一种原产于东亚的入侵物种，现在在整个欧洲的大豆上存在并大量存在，它已成为破坏作物的主要害虫。由于更好地了解 H. halys 的影响对于实施有效和可持续的害虫管理至关重要，因此本研究旨在评估大豆最容易受到 H. halys 攻击的阶段，以及它以大豆种子为食引起的定性和定量变化。因此，大豆植株在不同发育阶段暴露于臭虫成虫 2 周，并在收获时检查是否有损伤。由于大豆发育阶段 R4-R5 的 H. halys 攻击，Stay-green 综合征发生最为严重。在同一时期，虫子取食活动显着减少了每个豆荚的种子数量，从而表明在 R4-R5 阶段的损害率更高，此时应加强大豆监测以适当地针对害虫管理策略。由于植物补偿机制，每个豆荚的种子数量较少，对应于种子重量的增加，导致谷物产量与攻击时间或种子受损速度无关。然而，虽然不会导致整体体重产量的损失，但 H. halys 攻击被证明会对大豆种子造成定性损害，特别是通过改变蛋白质含量和从储存大分子中动员几种主要代谢物，这必须根据生产的预期用途来考虑。