Allyl isothiocyanate-induced tritrophic responses: Suppressing Myzus persicae and enhancing biological control in Brassica

IF 2.5 2区 农林科学 Q1 AGRONOMY
Yunliang Ji , Jamin Ali , Xiao Feng , Jianye Zhao , Yanni Liu , Khalid Ali Khan , Hamed A. Ghramh , Adil Tonğa , Qiyun Li , Rizhao Chen
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Abstract

Insect herbivores present a significant challenge to agricultural production, hindering efforts to meet the demands of the growing global population. Economically important Brassica crops are particularly susceptible to herbivorous pests. Among these pests, the aphid Myzus persicae Sulzer (Hemiptera: Aphididae) is a major threat. Although insecticides have been a common pest control strategy, their limitations—including insecticide resistance and non-target effects, highlight the need for sustainable alternatives. This study explores the potential of allyl isothiocyanate (AITC), a plant-released volatile compounds, as a defense elicitor to mitigate aphid infestations. We hypothesised that AITC treatment would reduce aphid performance while enhancing the effectiveness of natural enemies, such as the parasitoid Aphidius gifuensis and the predator Harmonia axyridis. Brassica plants were treated with three concentrations of AITC (50, 75, and 100 mg/L), while control plants received deionized water. Bioassays conducted 72 h after treatment assessed aphid performance (mortality, fecundity, development, weight, and preference) and the behavioural responses of natural enemies (foraging, parasitism, and olfactory preference). Our results showed that higher concentrations of AITC (75 and 100 mg/L) significantly reduced aphid performance, particularly in terms of weight and development. In olfactometer bioassays, aphids exhibited a lower preference for plants treated with 100 mg/L AITC. Conversely, natural enemies demonstrated enhanced efficacy and preference for plants treated with 100 mg/L AITC, except in the aphid consumption bioassay. These findings suggest that AITC has the potential to serve as a sustainable pest management tool for Brassica crops, possibly reducing aphid performance through direct toxicity and/or volatile-mediated signaling, while supporting biological control.

Abstract Image

异硫氰酸烯丙酯诱导的三营养反应:抑制桃蚜和增强油菜生物防治
昆虫食草动物对农业生产提出了重大挑战,阻碍了满足不断增长的全球人口需求的努力。经济上重要的芸苔属作物特别容易受到草食性害虫的影响。其中,蚜虫(半翅目:蚜虫科)是主要害虫。虽然杀虫剂一直是一种常见的害虫控制策略,但它们的局限性——包括杀虫剂抗药性和非目标效应——突出了对可持续替代品的需求。本研究探讨了异硫氰酸烯丙酯(AITC)作为一种植物释放的挥发性化合物,作为一种防御激发剂来减轻蚜虫的侵害。我们假设AITC处理会降低蚜虫的表现,同时提高天敌(如拟寄生蜂蚜虫和捕食者灰蚜)的有效性。采用50mg /L、75mg /L和100mg /L三种浓度的AITC处理芸苔属植物,对照植物采用去离子水处理。处理后72小时进行生物测定,评估蚜虫的表现(死亡率、繁殖力、发育、体重和偏好)和天敌的行为反应(觅食、寄生和嗅觉偏好)。我们的研究结果表明,高浓度的AITC(75和100 mg/L)显著降低了蚜虫的性能,特别是在体重和发育方面。在嗅觉生物测定中,蚜虫对100 mg/L AITC处理的植物表现出较低的偏好。相反,除蚜虫消耗生物测定外,100 mg/L AITC处理的植物对天敌表现出更强的药效和偏好。这些发现表明,AITC有潜力作为一种可持续的芸苔属作物害虫管理工具,可能通过直接毒性和/或挥发性介导的信号传导来降低蚜虫的表现,同时支持生物防治。
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来源期刊
Crop Protection
Crop Protection 农林科学-农艺学
CiteScore
6.10
自引率
3.60%
发文量
200
审稿时长
29 days
期刊介绍: The Editors of Crop Protection especially welcome papers describing an interdisciplinary approach showing how different control strategies can be integrated into practical pest management programs, covering high and low input agricultural systems worldwide. Crop Protection particularly emphasizes the practical aspects of control in the field and for protected crops, and includes work which may lead in the near future to more effective control. The journal does not duplicate the many existing excellent biological science journals, which deal mainly with the more fundamental aspects of plant pathology, applied zoology and weed science. Crop Protection covers all practical aspects of pest, disease and weed control, including the following topics: -Abiotic damage- Agronomic control methods- Assessment of pest and disease damage- Molecular methods for the detection and assessment of pests and diseases- Biological control- Biorational pesticides- Control of animal pests of world crops- Control of diseases of crop plants caused by microorganisms- Control of weeds and integrated management- Economic considerations- Effects of plant growth regulators- Environmental benefits of reduced pesticide use- Environmental effects of pesticides- Epidemiology of pests and diseases in relation to control- GM Crops, and genetic engineering applications- Importance and control of postharvest crop losses- Integrated control- Interrelationships and compatibility among different control strategies- Invasive species as they relate to implications for crop protection- Pesticide application methods- Pest management- Phytobiomes for pest and disease control- Resistance management- Sampling and monitoring schemes for diseases, nematodes, pests and weeds.
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