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Basis for Differential Susceptibility of Rice (Oryza sativa), Wild Rice (Zizania palustris), and Giant Burreed (Sparganium eurycarpum) to Bentazon

Published online by Cambridge University Press:  12 June 2017

Sharon A. Clay  and
Ervin A. Oelke
Sharon A. Clay
Affiliation:
Dep. Agron., and Plant Genetics, Univ. Minnesota, St. Paul, MN 55108
Ervin A. Oelke
Affiliation:
Dep. Agron., and Plant Genetics, Univ. Minnesota, St. Paul, MN 55108
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Abstract

The basis for differential susceptibility of tolerant rice (Oryza sativa L.), susceptible wild rice (Zizania palustris L.), and susceptible giant burreed (Sparganium eurycarpum Engelm. # SPGEU) to foliar application of 1.1 kg ai/ha of bentazon [3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] was investigated by evaluating herbicide absorption, translocation, and metabolism. Giant burreed and wild rice absorbed more bentazon than rice at similar growth stages. Less than 10% of the absorbed bentazon was translocated out of the treated leaf of any of the species. Differential tolerance of bentazon among the three species was due to differences in the rate of bentazon metabolism. Rice metabolized 98% of the bentazon retained in the treated leaf 1 day after treatment (DAT), while giant burreed and wild rice metabolized less than 2% of the bentazon retained in the treated leaf 5 DAT.

Keywords

AbsorptiontranslocationmetabolismSPGEU
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 36 , Issue 3 , May 1988 , pp. 301 - 304
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

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