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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引用次数: 0
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.
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.