Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (23): 88-93.doi: 10.11924/j.issn.1000-6850.casb2023-0221

Special Issue: 生物技术 植物保护

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The Detoxification Effect of Safeners of Cyclopropanesulfonamide and Isoxadifen-ethyl against Fenpyrazone in Corn

LIAN Lei1(), WANG Hengzhi2,3, LIU Weitang2,3, ZHANG Yaozhong4, JIN Yan4, FENG Ke5, HUANG Yizhao6, CHEN Shuang1, LU Xingtao1, GAO Chuanjie4()   

  1. 1Qingdao KingAgroot Crop Science Co., Ltd., Qingdao, Shandong 266000
    2College of Plant Protections, Shandong Agricultural University, Tai’an, Shandong 271018
    3Key Laboratory of Pesticide Toxicology and Application Technology, Tai’an, Shandong 271018
    4Institute for the Control of Agrochemicals of Shandong Province, Jinan 250000
    5Liaocheng Agricultural Technology Extension Service Center, Liaocheng, Shandong 252000
    6Zaozhuang University, Zaozhuang, Shandong 277000
  • Received:2023-03-20 Revised:2022-05-24 Online:2023-08-15 Published:2023-08-10

Abstract:

In order to optimize the application technology of fenpyrazone in corn (Zea mays Linn.) fields, the detoxification effect of safeners cyclopropanesulfonamide and isoxadifen-ethyl on fenpyrazone was studied in greenhouse targeted by ‘Liaodan 127’ maize, and the detoxification mechanism of cyclopropanesulfonamide was preliminarily studied by measuring the activity of glutathione transferase (GSTs) in maize. The results showed that under the treatment of effective component of fenpyrazone 360 g (a.i.) /hm2 stem and leaf spray, 7.5, 15, 30 g a.i. /hm2 of cyclopropanesulfonamide and isoxadifen-ethyl could improve the tolerance of ‘Liaodan 127’ maize to fenpyrazone, and the protection rate of plant height and fresh weight was between 117% and 269%. Among them, the protection rate of plant height and fresh weight of the treatment group treated with fenpyrazone combined with cyclopropanesulfonamide 15 g a.i. /hm2 reached the highest, with the protection rate of plant height and fresh weight of 133% and 269%, respectively. After adding the cyclopropanesulfonamide at 15 g a.i. /hm2, the enzymatic specific activity of GSTs in maize treated with fenpyrazone increased significantly within 1-9 days after application, and reached the maximum on the 5th day after application. In conclusion, cyclopropanesulfonamide increased the GSTs activity in maize, reduced the inhibitory effect of fenpyrazone on maize growth, and alleviated the herbicide damage in maize caused by fenpyrazone.

Key words: herbicide, safener, maize, fenpyrazone, cyclopropanesulfonamide