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Chinese Agricultural Science Bulletin ›› 2024, Vol. 40 ›› Issue (29): 113-119.doi: 10.11924/j.issn.1000-6850.casb2024-0073

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Effects of Pesticide Synergists on Physical Properties of 12 Herbicides

SUN Yan1(), ZHAO Hongying1(), SHI Chunling1, LI Yuquan1, LIANG Xinyu1, HUANG Ying1, HAN Shuang2,3, SONG Jinjun1   

  1. 1 Heilongjiang Forest Protection Research Institute, Harbin 150081
    2 Northeast Forestry University, Harbin 150040
    3 Shuangcheng District Forestry and Grassland Bureau of Harbin City, Harbin 150100
  • Received:2024-01-25 Revised:2024-05-13 Online:2024-10-15 Published:2024-10-14

Abstract:

This study aims to clarify the effect of pesticide synergists (mainly composed of compound modified vegetable oil, complex sugar alcohols, and non-ionic surfactant) on the physical properties of s-metolachlor, metolachlor, acetochlor, fomesafen, bentazone, clomazone, quizalofop-p-ethyl, atrazine, mesotrione, tembotrione, topramezone and diquat. The effects of pesticide synergists on a series of physical indexes of 12 herbicides were measured. The results showed that the physical properties of 12 herbicides were improved by different pesticide synergists. After each herbicide is mixed with pesticide synergist, 11 herbicides had a significant decrease in contact angle, 9 herbicides had a significant increase in expansion diameter, 3 herbicides had a significant decrease in surface tension, 7 herbicides had a significant increase in maximum retention on broadleaf weeds [Humulus scandens (Lour.) Merr.], and 9 herbicides had a significant decrease in penetration time. The results show that pesticide synergists have a basic condition for enhancing the physical properties of the 12 herbicides, and the synergistic effect of their weeding effect needs to be further verified through bioassay.

Key words: herbicide, pesticide synergists, adjuvant of pesticides, physical properties, synergism action, contact angle, extension diameter, surface tension, retention amount, penetration time