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Electrolytic Conductivity — a Rapid Measure of Herbicide Injury

Published online by Cambridge University Press:  12 June 2017

D.E. Vanstone  and
E.H. Stobbe
D.E. Vanstone
Affiliation:
Dep. Plant Sci., Univ. Manitoba, Winnipeg, Manitoba R3T 2N2
E.H. Stobbe
Affiliation:
Dep. Plant Sci., Univ. Manitoba, Winnipeg, Manitoba R3T 2N2
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Abstract

The use of electrolytic conductivity as a measure of cell membrane disruption was tested on buckwheat (Fagopyrum esculentum Moench. cv. ‘Tokyo’) plants which had been sprayed with paraquat (1,1′-dimethyl-4,4′-bipyridinium ion) or oxyfluorfen [2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene]. All treatments which resulted in tissue damage caused significant increases to the solutions where the discs were floated for measurement. The highest conductivity measurement (most membrane disruption) was obtained from paraquat. The highest concentration for each herbicide gave higher conductivity measurements than lower concentrations. A difference in the pattern of conductivity change induced by the two chemicals implies a different mode of action for each.

Type
Research Article
Information
Weed Science , Volume 25 , Issue 4 , July 1977 , pp. 352 - 354
Copyright
Copyright © 1977 by the Weed Science Society of America 

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References

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