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Journal of Tea Science ›› 2019, Vol. 39 ›› Issue (5): 587-594.doi: 10.13305/j.cnki.jts.2019.05.010

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Weeds Control Effect and Residues of Several Herbicides in Tea Gardens

GAO Wanjun1, ZHANG Yongzhi1, TONG Mengmeng1, MA Huiqin2, QIAN Shanshan3, WANG Tianyu3, LI Yeyun1, WU Huiping2, *, HOU Ruyan1, *   

  1. 1. State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China;
    2. School of Plant Protection, Anhui Agricultural University, Hefei 230036, China;
    3. Public Inspection Institute(Anhui) Co., Ltd, Hefei 230051, China
  • Received:2018-12-20 Revised:2019-02-19 Online:2019-10-15 Published:2019-10-15

Abstract: The weeds control effect of several herbicides (glyphosate, glufosinate and combination of glyphosate-acetochlor and glyphosate-auxiliaries) and the herbicides residues in the soil of treated plots in the tea gardens were compared. The results show that the glufosinate had a faster control effect on the weeds. The coverage of weeds decreased to 9.15% on the 7th treatment day. The control efficiency of glufosinate to the Geranium carolinianum L., Sonchus asper (L.) Hill., Conyza canadensis (L.) Cronqreached more than 95% on the 14th day. Glufosinate showed a faster degradation (the dissipation ratio was 94% on the 30th day) in the soil than the glyphosate (the residue concentration was 0.01βmg·kg-1 on the 58th treatment day). Therefore, glufosinate might be an alternative herbicide for weed control in tea gardens. Acetochlor, as a closed herbicide, had the potential of inhibiting the emergence of gramineous weeds and faster dissipation rate in the soil (the dissipation ratio was 97% on the 21th day), and therefore, it was recommended to control gramineous or the other weeds.

Key words: tea garden, herbicide, efficacy, pesticide residue

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