文献类型：期刊文献

英文题名：A floral resource enhances parasitoid-mediated pest control and increases rice yields

作者：Zhang, Hao[1];Wang, Jin-Yan[1];You, Chun-Mei[1];Woodcock, Ben A.[2];Chen, Yi-Juan[1];Wan, Nian-Feng[3];Ji, Xiang-Yun[1]

机构：[1]Shanghai Acad Agr Sci, Eco Environm Protect Inst, Shanghai Key Lab Protected Hort Technol, Key Lab Low Carbon Green Agr Southeastern China,Mi, Shanghai 201403, Peoples R China;[2]UK Ctr Ecol & Hydrol, Wallingford OX10 8BB, England;[3]East China Univ Sci & Technol, Sch Pharm, Shanghai Key Lab Chem Biol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：412

外文期刊名：AGRICULTURE ECOSYSTEMS & ENVIRONMENT

收录：;Scopus(收录号：2-s2.0-105047136210);WOS:【SCI-EXPANDED(收录号:WOS:001850029600001)】；

基金：We thank all the members of the Ecological Control of Pests Laboratory of Shanghai Academy of Agricultural Sciences for their advice and assistance. This work was supported by the Shanghai Municipal Agricultural Science and Technology Innovation Project (I2023008, A2024012), Shanghai Academy of Agricultural Sciences Program for Excellent Research Team (2022-017), Agricultural Science and Technology Innovation Research Special Program (EEPI-2026M-24CSJ140204), and National Ten Thousand Plan-Young Top Talents of China. BW is funded under NERC NE/W005050/1 AgZero+: Towards sustainable, climate-neutral farming.

语种：英文

外文关键词：Biocontrol services; Pesticide reduction; Plant diversity; Nectar plants; Trichogramma japonicum

摘要：Global rice production that exceeds 500 million tonnes annually currently provides a staple food for over 3 billion people. Its production has a high dependency on insecticides leading to diffuse pollution, impacts on biodiversity and reductions in critical ecosystem services. Through a four-year field experiment, we demonstrated that planting the annual flower Zinnia elegans along paddy field ridges significantly strengthens biological control provided by a hymenopteran egg parasitoid (Trichogramma japonicum). This is a key natural enemy of the striped stem borer (Chilo suppressalis) and rice leaf folder (Cnaphalocrocis medinalis), both major lepidopteran rice pests. Field trials showed that the combination of this flower with active releases of the parasitoid achieved pest suppression rates exceeding 81%, outperforming other tested interventions. Complementary laboratory experiments suggest that this may be mechanistically underpinned by nectar resources increasing adult parasitoid longevity (by 47.1-55.8%) and parasitic capacity (by 37.2-41.7%). Spatial layout field experiments also identified that the width of both flower strips and the rice paddy plots influenced the magnitude of pest control. Finally, we used a two-year demonstration study to show that flower strip establishment combined with parasitoid release led to a 60% reduction in conventional number of insecticide applications as well as average control efficacies of 92.4% for stem borer and 93.1% for leaf folder, respectively. This integrated pest management strategy surpassed the performance of the full dose insecticide regime, while also increasing spider density by 56.7%, reducing pest rice planthopper density by 19.7%, and raising rice yields by 6.9% (to 7077.5 kg ha(-1)). This increased the net economic benefit by 10.1% (to 45,096.1 Chinese Yuan (CNY) ha(-1)). Our findings reveal a practical, scalable approach that harnesses floral-resource provisioning that promotes biocontrol, curbs pesticide inputs, and delivers robust agronomic and ecological gains.