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Monitoring Photosynthesis to Measure Translocation of Bentazon in Common Cocklebur

Published online by Cambridge University Press:  12 June 2017

J.R. Potter
J.R. Potter*
Affiliation:
Ornamental Plants Res. Lab., Agric. Res. Serv., U.S. Dep. Agric., Corvallis, OR 97330
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Abstract

The movement of biologically active levels of bentazon [3-isopropyl-1H-2,1,3-benzothiadiazin-(4) 3H-one 2,2-dioxide] was followed by monitoring photosynthetic activity of plant parts after application of the herbicide. Bentazon was applied to roots, stems, petioles, portions of the canopy, and portions of individual leaves of 4- to 24-day-old common cocklebur (Xanthium pensylvanicum Wallr.) at rates comparable to field application rates. Application of bentazon anywhere on the plant either slowed or stopped photosynthesis in leaves acropetal to the point of application. Contact of bentazon with stems, petioles or roots contributed to the phytotoxicity of the herbicide.

Type
Research Article
Information
Weed Science , Volume 25 , Issue 3 , May 1977 , pp. 241 - 246
Copyright
Copyright © 1977 by the Weed Science Society of America 

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References

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