Seletividade e eficiência de herbicidas aplicados em pré-emergência na cultura da mandioca

Scariot, C.A.; Costa, Nivan B. da; Bosquese, Everton Paulo; Andrade, Devair Carlos de; Sontag, Daniel Adriano

doi:10.1590/s1983-40632013000300012

Cited by 17 publications

(31 citation statements)

References 20 publications

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“…et al (2001a), who have observed that sulfentrazone application (600 g ha -1 ) in averaged textured dystrophic red latosol (70% of sand) in the notillage system promotes 62.9% decreased productivity compared to non-weeded control and was not selective for cassava cultivar Espeto. However, they differ from those obtained by Scariot et al (2013), who have observed that sulfentrazone (600 g ha -1 ) and the mix of clomazone+sulfentrazone (900 + 500 g ha -1 ) have not caused intoxication and have not reduced the production of Cascuda cassava roots in clayey soil (55% of clay), being considered selective. However, the result obtained by Scariot et al (2013) may indicate the existence of differential tolerance among cultivars to the application of sulfentrazone in clayey soil, and cultivar Cascuda was more tolerant than cultivar Baianinha used in the present study.…”

Section: Resultscontrasting

confidence: 90%

“…As sulfentrazone selectivity for cassava was observed Scariot et al (2013), it is suggested that further studies are conducted for sulfentrazone dose adjustment and tank mixtures, especially in crops in clayey soil, to determine selectivity or tolerance of the main cultivars to the herbicide.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, sulfentrazone emerges as an option for weed control in cassava crops because of the high efficiency and the fact that the mechanism of action (Protox) is different from the herbicides registered (El-Sharkawy, 2004;Silva et al, 2009;Scariot et al, 2013). However, sulfentrazone has shown low selectivity to cassava plants when grown in sandy soil (Oliveira Jr. et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Sulfentrazone Selectivity and Efficiency in Cassava Crops in Sandy and Clayey Soils

et al. 2015

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Recebido para publicação em 16.7.2015 ABSTRACT -Weeds have the potential to dramatically interfere in cassava cultivation, reducing its productive potential; however, there are few studies on the selective herbicides in this crop. Therefore, the objective was to evaluate in this work the selectivity and efficiency of sulfentrazone in cassava crops grown in sandy and clayey soils. Two experiments were carried out: The first one was carried out in sandy soil conditions in the conventional system; and the second one was carried out in clayey soil conditions in the no-tillage system. The experimental design was a randomized block with four replications. The treatments consisted in doses of 250, 500, 750 and 1,000 g ha -1 of sulfentrazone, and weeded and non-weeded controls. Sulfentrazone application in cassava crops has linearly reduced the production of roots in a proportion of 0.0153 and 0.0107 t ha -1 at each increment in grams of the active ingredient, respectively. It was concluded that sulfentrazone was not selective for cassava crops grown both in sandy and in clayey soil; however, it was highly effective in weed control in both soils.

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Section: Resultscontrasting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sulfentrazone Selectivity and Efficiency in Cassava Crops in Sandy and Clayey Soils

et al. 2015

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“…applied in Distrophic Red Oxisol of medium texture (70% of sand) and in the no-tillage system has reduced yield by 62.9% and was not selective to Espeto cassavas cultivar. As for Scariot et al (2013), they have found that sulfentrazone (600 g ha -1…”

Section: Resultsmentioning

confidence: 90%

Application of Sulfentrazone in Stages of Germination of IAC 90 Cassava Cuttings in Clay Soils and Sandy

et al. 2015

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-Weeds interfere dramatically in the productive potential of cassava; however, information regarding herbicides that are selective to crops is still scarce. Thus, the aim in this study was to assess the initial growth of IAC 90 cassava plants after the application of sulfentrazone at different stages of germination of cassava in clayey and sandy soils. Three experiments were simultaneously deployed: the first experiment consisted in the application of sulfentrazone in the non-germinated stage of cassava cuttings; the second one in the stage of germinated cassavas cuttings (0.9 cm shoots); and the third one in applications in the stage of cassava cuttings with buds emerging (6.5 cm shoots and emerging from the soil). For each experiment the experimental design in randomized blocks was used in the 2 x 5 factorial arrangement with four replications. The factors were composed of two soils (sandy and clayey) and five doses of sulfentrazone (0, 250, 500, 750 and 1,000 g ha -1). It was found that depending on the herbicide dose, development stage of the buds of cassava cuttings and the type of soil, damage can occur in the initial development of the IAC 90 cassava plants. The greatest potential of sulfentrazone selectivity has occurred in applications in the nongerminated cassava cuttings stage and in doses lower than 500 g ha -1in the clayey soil.Keywords: herbicide, Manihot esculenta, protox inhibitor, selectivity. RESUMO -As plantas daninhas interferem drasticamente no potencial produtivo da mandioca

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“…The pre-emergence clomazone application in the encapsulated suspension formulation (900 g ha -1 and 1,080 g ha -1 ) were selective for the 'cascuda' cassava cultivar, which also belongs to the Euphorbiaceae family (Scariot et al 2013). Similarly, the post-emergence clomazone application after pruning in the 'baianinha' cassava crop caused lower phytotoxicity when using the encapsulated suspension formulation than when using the emulsifiable concentrate, at 900 g ha -1 doses (Costa The results presented do not confirm the hypothesis of this study, which predicts that the clomazone herbicide registered for the cassava crop could also be selective for jatropha plants.…”

Section: Resultsmentioning

confidence: 99%

Effects of clomazone formulations at the initial development of Jatropha curcas

Berté

Costa

Ramella

2015

Pesqui. Agropecu. Trop.

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Competition with weeds is one of the obstacles to achieve high yields in jatropha harvest. The chemical method is an alternative weed control due to its high efficiency, readiness and economy, when compared to other methods. However, products recommended for this crop are scarce. This study aimed at evaluating the effects of pre and post-emergence clomazone formulations at the initial development of jatropha. Two experiments were conducted under a randomized blocks design, in a 2 x 5 factorial arrangement, with four replications, consisting of the combination of two clomazone formulations (encapsulated suspension and emulsifiable concentrate) and five doses (0 g ha-1, 250 g ha-1, 500 g ha-1, 1,000 g ha-1 and 2,000 g ha-1). The dry matter of the plants was reduced both in the pre-emergence and post-emergence applications. Net photosynthesis was not affected by the application of clomazone in both formulations. The encapsulated suspension formulation is less phytotoxic than the emulsifiable concentrate formulation for pre and post-emergence applications. However, both formulations negatively affect the early development of jatropha plants.

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Seletividade e eficiência de herbicidas aplicados em pré-emergência na cultura da mandioca

Cited by 17 publications

References 20 publications

Sulfentrazone Selectivity and Efficiency in Cassava Crops in Sandy and Clayey Soils

Sulfentrazone Selectivity and Efficiency in Cassava Crops in Sandy and Clayey Soils

Application of Sulfentrazone in Stages of Germination of IAC 90 Cassava Cuttings in Clay Soils and Sandy

Effects of clomazone formulations at the initial development of Jatropha curcas

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