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Chinese Agricultural Science Bulletin ›› 2026, Vol. 42 ›› Issue (6): 187-194.doi: 10.11924/j.issn.1000-6850.casb2025-0563

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Screening and Application of Herbicides in Dryland Maize-Soybean Belt Compound Planting Field in Mountainous Area of Southern Ningxia

CHAI Junfa1(), SONG Shuang1, LYU Jiandong2, ZHANG Yi1()   

  1. 1 Institute of Plant Protection, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002
    2 Shapotou District Agricultural Technology Extension Service Center, Zhongwei, Ningxia 755000
  • Received:2025-07-03 Revised:2025-12-25 Online:2026-03-25 Published:2026-03-30

Abstract:

In order to screen suitable soil and stem-leaf spraying herbicides for maize-soybean strip intercropping, taking 'Xianyu 1225' and 'Tiefeng 31' as materials, the control effect and safety of 19 herbicides on weeds in maize and soybean fields were determined by the whole plant bioassay method. The results showed that under the recommended dose treatment, the control effect of s-metolachlor+thifensulfuron-methyl was the best in the soil applied treatment of maize-soybean strip composite planting field. The total plant control effect could reach 83.66%, and the fresh weight control effect could reach 91.67%. In the stem and leaf spraying treatment, the combination of clethodim+bentazone+acifluorfen had the best control effect on weeds in soybean field, with the plant control effect of 92.19% and the fresh weight control effect of 88.47%. The control effects of mesotrione·nicosulfuron·atrazine+fluroxypyr-meptyl and tembotrione·atrazine on weeds in corn fields were better. The plant control effects were 95.08% and 94.1%, and the fresh weight control effects were 97.98% and 91.29%. Therefore, s-metolachlor+thifensulfuron-methyl, clethodim+bentazone+acifluorfen, mesotrione·nicosulfuron·atrazine+fluroxypyr-meptyl and tembotrione·atrazine can be used for pre-emergence soil surface in maize-soybean intercropping field, soybean stem and leaf spray and maize stem and leaf spray. These herbicides have no significant effect on the growth of soybean and corn, and have the potential for popularization and application.

Key words: maize-soybean, soil surface, stem and leaf spray, herbicide