Quick Detection Methods of the Sensitivity of Weeds to Glyphosate

[Aims] The method of quickly detecting weed sensitivities to glyphosate was established.[Methods] The reliabilities of the conventional whole-plant method and two quick methods seed bioassay and leaf segment bioassay were compared in detecting weed sensitivities to glyphosate with four weed species Echinochloa crus-galli,Setaria viridis,Amaranthus retroflexus and Abutilon theophrasti.[Results] The sensitivity of these weeds to glyphosate was similar whether using seed and leaf segment detection methods or using the conventional detection method.The order of weed sensitivity to this herbicide was A.theophrasti E.crus-galli A.retroflexus S.viridis.[Conclusions] Seed bioassay and leaf segment bioassay are reliable in detecting sensitivities of weeds to glyphosate.