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Herbicide Screening and Application Method Development for Sustainable Weed Management in Tagetes erecta L. Fields

文献类型： 外文期刊

作者： Zhang, Yiping 1 ; Feng, Dongyan 4 ; Jia, Chengcheng 4 ; Huang, Wangqi 1 ; Xu, Feng 1 ; Jiang, Yalian 1 ; Huang, Junhong 5 ; Li, Ye 5 ; Wang, Jihua 1 ; Tang, Dongsheng 4 ;

作者机构： 1.Yunnan Acad Agr Sci, Flower Res Inst, Kunming 650205, Peoples R China

2.Yunnan Acad Agr Sci, Yunnan Flower Breeding Key Lab, Kunming 650205, Peoples R China

3.Yunnan Acad Agr Sci, Yunnan Flower Technol Innovat Ctr, Kunming 650205, Peoples R China

4.Yunnan Agr Univ, Coll Plant Protect, Kunming 650201, Peoples R China

5.Yunnan Bohao Biotechnol Grp Co Ltd, Qujing 655331, Peoples R China

关键词： weed management; pre-emergence herbicides; post-emergence herbicides; crop safety

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2025 年 14 卷 11 期

页码：

收录情况： SCI

摘要： Marigold (Tagetes erecta L.), a crop of significant medicinal, ornamental, and economic value, faces severe industrialization challenges due to weed-induced yield losses (up to 60%). This study aims to identify safe and highly efficient herbicides for marigold, assess their effects on dominant weeds and crop safety, and provide a practical basis for large-scale cultivation. We evaluated 11 pre-emergence herbicides, 13 post-emergence herbicides, and agronomic practices (plastic mulch) through three field trials to optimize weed control, crop safety, and productivity. In Experiment 1, pre-emergence applications of pendimethalin (35% SC) and oxyfluorfen (240 g/L EC) under plastic mulch suppressed 85-99% of grass and broad-leaved weeds, elevating marigold yield to 1655.6 kg/667 m2 and increasing lutein content by 10.7% compared to controls, with no phytotoxicity to subsequent wheat (Triticum aestivum L.)or broad beans (Vicia faba L.). Experiment 2 demonstrated that post-cultivation soil treatment with metolachlor oxyfluorfen pendimethalin (50% EC) enhanced weed suppression (47.8-53.6%) and yield (3.4% increase) while ensuring crop safety. Experiment 3 revealed that the post-emergence herbicides haloxyfop-P-methyl (108 g/L EC) and fomesafen (250 g/L SL) achieved over 92% reduction in grass weed biomass and over 75% reduction in broadleaf weed density, respectively, alongside a 6.1% yield improvement. Therefore, region-specific strategies are recommended based on local agronomic conditions: high-value production zones should adopt integrated systems combining plastic mulch with pre-emergence herbicides; arid lands with extended crop rotation intervals require pre-emergence herbicides after intertillage and earthing-up; labor-abundant regions can rotate targeted post-emergence herbicides to delay resistance evolution. This study provides data-driven optimization strategies for comprehensive weed management in marigold fields, offering practical solutions to enhance industrial productivity and ecological sustainability.

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