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Differential Bahiagrass (Paspalum notatum) Cultivar Response to Atrazine

Published online by Cambridge University Press:  12 June 2017

Albert E. Smith
Albert E. Smith*
Affiliation:
Dep. Agron., Univ. Georgia, Experiment, GA 30212
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Abstract

‘Wilmington’ and ‘Pensacola’ cultivars of bahiagrass (Paspalum notatum Flügge) were found to exhibit a differential level of tolerance to certain triazine herbicides. Pensacola was more susceptible to postemergence treatments of atrazine [2 - chloro - 4 - (ethylamino) - 6 - (isopropylamino) -s - triazine], simazine [2 - chloro - 4,6 - bis (ethylamino) - s-triazine], and cyanazine {2 - [ [4 - chloro - 6 - (ethylamino) -s - triazin - 2 - yl] amino] - 2 - methylpropionitrile} than Wilmington. Injury to Pensacola was noted as early as 2 weeks after the application of 2.4 kg/ha atrazine and cyanazine, whereas similar injury to Wilmington was not observed until later than 4 weeks after the treatment date. Results of 14C-atrazine treatments indicated that Wilmington bahiagrass accumulated approximately twice as much 14C-atrazine: peptide conjugate as the Pensacola cultivar.

Keywords

Phytotoxicityherbicide detoxificationtriazine herbicides
Type
Research Article
Information
Weed Science , Volume 31 , Issue 1 , January 1983 , pp. 88 - 92
Copyright
Copyright © 1983 Weed Science Society of America 

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