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Basis for Selectivity of Linuron on Carrot and Common Ragweed

Published online by Cambridge University Press:  12 June 2017

Henry Kuratle ,
E. M. Rahn  and
C. W. Woodmansee
Henry Kuratle
Affiliation:
Department of Plant Science, University of Delaware, Newark, Delaware
E. M. Rahn
Affiliation:
Department of Plant Science, University of Delaware, Newark, Delaware
C. W. Woodmansee
Affiliation:
Animal Science and Agricultural Biochemistry, University of Delaware, Newark, Delaware
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Abstract

Both carrot (Daucus carota L.) and common ragweed (Ambrosia artemisiifolia L.) plants metabolized 3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea (linuron). Traces of all of the following derivatives of linuron were detected in both plants: 3-(3,4-dichlorophenyl)-1-methoxyurea, 3-(3,4-dichlorophenyl)-1-methylurea, 3-(3,4-dichlorohenyl)urea, and 3,4-dichloroaniline. Differences in absorption and concentration of these derivatives were observed between carrot and ragweed plants. All of the above derivatives were phytotoxic to common ragweed plants except for 3-(3,4-dichlorophenyl)urea and 3,4-dichloroaniline, while none of the derivatives were phytotoxic to carrot. In carrot, 87% of the applied linuron was metabolized to nonphytotoxic derivatives compared to only 13% in common ragweed plants. It appears that a combination of differences in absorption, metabolism, and phytotoxicity of several of the metabolite derivatives of linuron to carrot and common ragweed plants may be the primary reason for differences in sensitivity of these two plants to linuron.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 2 , April 1969 , pp. 216 - 219
Copyright
Copyright © 1969 Weed Science Society of America 

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References

Literature Cited

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