Monitoring of herbicide effect in maize based on electrical measurements
G. Fekete 2
,  
K.R. Végh 1
,  
A. Székács 2
,  
M. Mörtl 2
,  
 
 
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1
Research Institute for Soil Science and Agricultural Chemistry, Hungarian Academy of Sciences, H-1022 Budapest, Herman O. út 15, Hungary
2
Plant Protection Institute, Hungarian Academy of Sciences, H-1022 Budapest, Herman O. út 15, Hungary
 
Int. Agrophys. 2012, 26(3): 243–247
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ABSTRACT
The effect of the herbicide acetochlor on root growth was studied by a non-destructive electrical impedance and capacitance method in pot experiments on maize. Acetochlor was applied both as single active ingredient and mixed with safener AD-67 in two dosages. Without safener addition, acetochlor had a permanent inhibiting effect on plant root expansion. The safener AD-67 was capable of providing protective effect against herbicide application. High correlations between root electrical impedance or capacitance and the root dry mass or surface area under our labo- ratory conditions were confirmed by plant harvest method. Root electrical impedance and capacitance measurements proved to be valid for monitoring the effect of the herbicide influencing root development and for distinguishing plant groups subjected to different stress conditions.
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