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Damage potential of the broad bean beetle (Bruchus rufimanus Boh.) on seed quality and yield of faba beans (Vicia faba L.)
Crop Protection ( IF 2.5 ) Pub Date : 2023-03-07 , DOI: 10.1016/j.cropro.2023.106227
Johann Huber , Nicole Chaluppa , Benno Voit , Siegrid Steinkellner , Berta Killermann

The broad bean beetle (Bruchus rufimanus Boh.) is a serious pest of faba bean (Vicia faba L.) that threatens seed production in times of an increased demand for faba bean seeds due to the expansion of faba bean cropping area over the last decade. Three organic and three conventional field trials a year were conducted from 2019 to 2021 in three environmental different regions in Northern, Central and Southern Germany to test different control strategies and to investigate the bruchids' damage potential on seed quality and yield. The field trials show that organic cropping systems are more susceptible than conventional ones while no tested control strategy delivered satisfying and between years and test sites steady results. Neither yield nor thousand seed weight was influenced by bruchid infestation. However, germination of harvested seeds was highly linked with bruchid infestation, although the degree of correlation varied between years and cropping systems because of different climatic conditions during flowering and different high infestation pressures with fungal pathogens. Germination reduction by bruchid infestation occurs less as a result of damage to the embryo, but mainly as a result of increased susceptibility to fungal pathogens due to injured seed coats. In the trial period, infestation caused by pre-year's bruchids overwintering in stored faba beans was significantly lower than by bruchids migrating into the fields during flowering and the different infestation patterns had fundamentally different consequences for germination and therefore seed quality. Therefore, not the absence of living bruchids in the seeds is crucial for seed quality, but an as low as possible bruchid impairment of any kind.



中文翻译:

蚕豆甲虫 (Bruchus rufimanus Boh.) 对蚕豆 (Vicia faba L.) 种子质量和产量的危害潜力

蚕豆甲虫 ( Bruchus rufimanus Boh.) 是蚕豆 ( Vicia faba)的严重害虫L.),在过去十年蚕豆种植面积扩大导致蚕豆种子需求增加时威胁到种子生产。从 2019 年到 2021 年,每年在德国北部、中部和南部的三个不同环境区域进行三项有机田间试验和三项常规田间试验,以测试不同的控制策略并调查 bruchids 对种子质量和产量的危害潜力。田间试验表明,有机种植系统比传统种植系统更容易受到影响,而没有经过测试的控制策略产生令人满意的结果,并且在多年和试验地点之间取得稳定的结果。产量和千粒重均未受到 bruchid 侵染的影响。然而,收获的种子发芽与 bruchid 侵染高度相关,尽管由于开花期间的不同气候条件和真菌病原体的不同高侵染压力,年份和种植系统之间的相关程度不同。由于对胚胎的损害,bruchid 侵染导致的发芽减少较少发生,但主要是由于种皮受损导致对真菌病原体的易感性增加。在试验期间,在储存的蚕豆中越冬的早年蚕豆引起的侵扰明显低于开花期间迁移到田间的蚕豆,不同的侵染模式对发芽和种子质量产生根本不同的影响。因此,对于种子质量而言,不是种子中没有活的布鲁奇很重要,而是任何种类的布鲁奇损伤尽可能低。

更新日期:2023-03-07
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