Impact of a new pesticide on rhizosphere microbes and plant health:Case study of Y17991 against sharp eyespot in wheat  

作　　者：Xiangxia Yang Tingting Chen Libo Xiang Limin Liu Mi Wei 

机构地区：[1]School of Agriculture,Shenzhen Campus of Sun Yat-Sen University,Shenzhen 518107,China [2]Institute of Plant Protection and Soil Fertilizer,Hubei Academy of Agricultural Sciences/Key Laboratory of Integrated Pest Management for Crops in the Central Region,Ministry of Agriculture and Rural Affairs/Hubei Key Laboratory of Crop Pest and Weed Control,Wuhan 430079,China [3]Agricultural Technology Service Center of Yuxin Town,Tianmen 433000,China [4]Key Laboratory for Quality Control of Characteristic Fruits and Vegetables of Hubei Province,College of Life Science and Technology,Hubei Engineering University,Xiaogan 432000,China

出　　处：《Journal of Integrative Agriculture》2025年第2期769-785,共17页农业科学学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(32270296);the Shenzhen Postdoctoral Scientific Research,China(77000-42100004);the Key Basic Research and Development Program of Hubei Province,China(2020BBA052);the Natural Science Foundation of Guangdong Province,China(2024A1515010498)and the Fundamental Research Funds for the Central Universities,Sun Yat-sen University,China.

摘　　要：Sharp eyespot(Rhizoctonia cerealis)is a widespread soil-borne fungal disease that poses a severe threat to wheat health,and it is one of the main obstacles to achieving stable and high-quality wheat yields in China.Our collaborative team has developed a novel,efficient,and low-toxicity fungicide named Y17991(N-(2-(2,4-bis-(trifluoromethyl)phenoxy)phenyl)-3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxamide).Preliminary laboratory tests confirmed the significant inhibitory effect of this agent on R.cerealis.Large-area field trials also demonstrated its efficacy,with a disease prevention index of 83.52%,which is 1.97%greater than that of the widely used thifluzamide,and it significantly increased the wheat yield.Moreover,this study explored the impacts of Y17991 on the structure and function of the microbial community in wheat rhizosphere soil.Bacterial communities were more strongly affected than fungal communities.Y17991 significantly modulated key amino acid metabolic pathways and certain biosynthetic processes in diseased wheat rhizospheres,and it also enhanced certain biosynthetic pathways and metabolic activities in healthy wheat rhizospheres.Additionally,the application of Y17991 regulated rhizosphere metabolites,thus exerting significant control over the microbial community.We identified 15 microbial strains potentially involved in the prevention and treatment of R.cerealis,and Y17991 treatment promoted the growth of Pedobacter and Bacillus strains.These strains not only aid in plant growth but they also have the potential for disease prevention.In summary,Y17991 application at a reasonable dose does not cause significant disruption to nontarget rhizosphere microbial communities.In future studies,we will continue to investigate the impacts of Y17991 on nonmicrobial components in soil ecosystems,such as protozoa and nematodes.Our research provides a theoretical basis for the scientific application and promotion of new fungicides and offers a significant reference for establishing a comprehensive system for

关 键 词：PESTICIDE sharp eyespot rhizosphere microbial community rhizosphere metabolites culturable microorganisms 

分 类 号：S435.121.4[农业科学—农业昆虫与害虫防治]