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Control Efficacy of Ethoxyfen-ethyl on Weeds of Soybean(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2008年02期
Page:
301-305
Research Field:
Publishing date:

Info

Title:
Control Efficacy of Ethoxyfen-ethyl on Weeds of Soybean
Author(s):
TENG Chun-hong
Northeast Agricultural University，Harbin 150030，Heilongjiang，China
Keywords:
Ethoxyfenethyl; Soybean; Broadleaf weeds; Succeeding crop; Methylated vegetable oil
PACS:
S451.22
DOI:
10.11861/j.issn.1000-9841.2008.02.0301
Abstract:
Ethoxyfen-ethyl which is diphenylether herbicide is developed by Budapest Chemical，it’s mechanism of action is protox inhibitor，it can control weeds in soybean，peanut，english pea，winter wheat and winter barley.Ethoxyfen-ethyl’s biological activity is highest and it’s applied range is the widest among diphenylether herbicide.Ethoxyfen-ethyl is post-applied herbicide.Ethoxyfen-ethyl’s biological activity is higher than most herbicide.Ethoxyfen-ethyl mainly control annual broadleaf weeds，and it can inhibit perennial weeds to some extent.To discuss utilization technology for the herbicide ethoxyfen-ethyl applied in soybean（Glycine max)，greenhouse pot experiments were conducted to investigate control efficacy，safety to soybean，effect on succeeding crop and effect of methylated vegetable oil on ethoxyfen-ethyl’s activity.In greenhouse pot experiments，ethoxyfen-ethyl 30% aqueous solution had a good control effect to broadleaf weeds by foliar treatment，control efficacy occurred rapidly，injury symptoms occurred at the day after treatment，injury weed leaves occurred brown spot.Ethoxyfen-ethyl’s activity of 20 mL a.i. ha-1was higher than that of fomesafen 25% aqueous solution of 300 mL a.i. ha-1.Ethoxyfen-ethyl visible control at 20-30 mL a.i. ha-1to broadleaf weeds was 78％-82.5％ 4 d after treatment，88％-91％ 7 d after treatment.Ethoxyfen-ethyl also had some activity on grass weeds.Ethoxyfen-ethyl caused certain injury on soybean，the injury increased with application rate increased，soybean could recover safely from injury，few soybean applied by ethoxyfen-ethyl with high concentrate（100，120 mL a.i. ha-1）was dead，injury was similar to that of acifluorfen.Ethoxyfen-ethyl had no residue in soil and it is safe to succeeding crop such as maize（Zea mays L）and wheat（Triticum aestivum L.）.Ethoxyfen-ethyl applied with methylated vegetable oil provided a dramatic increase in weeds control efficacy.Concern of both control efficacy and injury，the optimal application rate of ethoxyfen-ethyl 30% aqueous solution is 20~30 mL a.i. ha-1applied in soybean，and ethoxyfen-ethyl should be applied with 0.5% spray volume methylated vegetable oil.

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Last Update: 2014-10-10