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      Sulfentrazone: Environmental Dynamics and Selectivity Translated title: Sulfentrazone: Dinâmica Ambiental e Seletividade

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          Abstract

          ABSTRACT: Sulfentrazone is a pre-emergence herbicide that inhibits protoporphyrinogen oxidase (Protox). Its use has emphasis on areas like soybeans planted in lowlands, soybean, and sugarcane in areas of cerrado, and also in the implementation of eucalyptus afforestation. The use of sulfentrazone into resistant weed management programs mainly to glyphosate and acetolactate synthase (ALS) inhibitors has been successful. However, the information on the environmental behavior of this herbicide is limited, even more restricted when it refers to the lowland areas where problems are frequently observed regarding the selectivity of sulfentrazone, due to the soil and climatic peculiarities of this environment. In this context, the present review aims to describe the main characteristics of sulfentrazone to its environmental dynamics.

          Translated abstract

          RESUMO: O sulfentrazone é um herbicida com ação em pré-emergência que inibe a protoporfirinogênio oxidase (Protox). Sua utilização tem ênfase em áreas de expansão, como a soja em terras baixas, soja e cana-de-açúcar em áreas de cerrado, e também na implantação de florestamentos de eucalipto. A inserção do sulfentrazone em programas de manejo de plantas daninhas resistentes, principalmente ao glifosato e a inibidores da acetolactato sintase (ALS), vem obtendo sucesso. Contudo, as informações sobre o comportamento ambiental desse herbicida são limitadas, sendo ainda mais restritas quando se trata de áreas de terras baixas, onde frequentemente são observados problemas quanto à seletividade do sulfentrazone, em razão das peculiaridades edafoclimáticas desse ambiente. Nesse âmbito, esta revisão teve por objetivo relacionar as principais características do sulfentrazone com sua dinâmica ambiental e sua seletividade, compreendendo esses processos, a fim de otimizar sua utilização.

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            Groundwater ubiquity score: A simple method for assessing pesticide leachability

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              Protoporphyrinogen oxidase as a molecular target for diphenyl ether herbicides.

              Diphenyl ether herbicides induce an accumulation of protoporphyrin IX in plant tissues. By analogy to human porphyria, the accumulation could be attributed to decreased (Mg or Fe)-chelatase or protoporphyrinogen oxidase activities. Possible effects of acifluorfen-methyl on these enzymes were investigated in isolated corn (maize, Zea mays) etioplasts, potato (Solanum tuberosum) and mouse mitochondria, and yeast mitochondrial membranes. Acifluorfen-methyl was strongly inhibitory to protoporphyrinogen oxidase activities whatever their origins [concn. causing 50% inhibition (IC50) = 4 nM for the corn etioplast enzyme]. By contrast, it was roughly 100,000 times less active on (Mg or Fe)-chelatase activities (IC50 = 80-100 microM). Our results lead us to propose protoporphyrinogen oxidase as a cellular target for diphenyl ether herbicides.
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                Author and article information

                Journal
                pd
                Planta Daninha
                Planta daninha
                Sociedade Brasileira da Ciência das Plantas Daninhas (Viçosa, MG, Brazil )
                0100-8358
                1806-9681
                2020
                : 38
                : e020215663
                Affiliations
                [1] Pelotas Rio Grande do Sul orgnameUniversidade Federal de Pelotas orgdiv1FAEM Brazil
                Article
                S0100-83582020000100401 S0100-8358(20)03800000401
                10.1590/s0100-83582020380100032
                f352785e-5a56-4197-854b-c4a51af5ef35

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 22 October 2018
                : 01 April 2019
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 92, Pages: 0
                Product

                SciELO Brazil

                Self URI: Full text available only in PDF format (EN)
                Categories
                Literature Review

                triazolinona,pre-emergent,sorção,sorption,pré-emergente,triazolinone,manejo de plantas daninhas,weed management

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