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

Costa, Nivan B. da; Ferreira, Sílvio Douglas; Ramella, João Ricardo Pompermaier; Moratelli, Gustavo; Dourado, Rodrigo Fernando

doi:10.1590/s0100-83582015000400017

Cited by 3 publications

(4 citation statements)

References 16 publications

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“…The other treatments form a single group, with an average of 27.9% starch content. Several authors, among them Abreu et al (2010), Franciscon et al (2016, Costa et al (2014), andCosta et al (2015b), have pointed out that pre-emergent and postemergent application of herbicides do not cause reductions in starch content.…”

Section: Results and Discussion 1 St Experimentsmentioning

confidence: 99%

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Chemical management of weeds in cassava crop, cultivar ‘Santa Helena’

et al. 2021

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The objective of this study was to evaluate the selectivity of cassava cultivar 'Santa Helena' and the efficiency of weed control using herbicides applied alone or tank mixed with and without sequential applications. Two experiments were carried out, both in a randomized block design with four replications. The treatments for the 1 st experiment were: Hand hoeing (weed-free control); No hand hoeing (non-weeded control); sulfentrazone (500 g ha -1 ); sulfentrazone/ [clomazone + clethodim] (500/[1125 + 120] g ha -1 ); sulfentrazone/mesotrione (500/240 g ha -1 ); S-metolachlor (1920 g ha - 1); S-metolachlor/[clomazone + clethodim] (1920/[1125 + 120] g ha -1 ); S-metolachlor/mesotrione](1920/240 g ha -1 ); [sulfentrazone + S-metolachlor]/[clomazone + clethodim] ([500 + 1920]/[1125 + 120] g ha -1 ); [sulfentrazone + S-metolachlor]/ mesotrione ([500 + 1920]/240 g ha -1 ). The treatments of the 2 nd experiment were: Hand hoeing (weed-free control); No hand hoeing (non-weeded control); glyphosate (360 g ha -1 ) + hand hoeing; glyphosate + sulfentrazone (360 + 500 g ha - 1); glyphosate + flumioxazin (360 + 50 g ha -1 ); glyphosate + clomazone (360 + 1125 g ha -1 ); glyphosate + S-metolachlor (360 + 1920 g ha -1 ); glyphosate + sulfentrazone + clomazone (360 + 400 + 900 g ha -1 ); glyphosate + sulfentrazone + Smetolachlor (360 + 400 + 1440 g ha -1 ); glyphosate + flumioxazin + clomazone (360 + 40 + 900 g ha -1 ); glyphosate + flumioxazin + S-metolachlor (360 + 40 + 1440 g ha -1 ). In the first experiment, only the treatments S-metolachlor, Smetolachlor/[clomazone + clethodim] and S-metolachlor/mesotrione did not present efficient weed control, causing reduction in yields; the other treatments were crop selective and efficient. In the second experiment, all treatments showed excellent levels of weed control up to 65 DAA and were crop selective. It is concluded that applications of tank mixtures, sequential mixtures and the use of glyphosate mixed with pre-emergent herbicides constitute excellent alternatives of weed management strategies in 'Santa Helena' cassava.

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Section: Results and Discussion 1 St Experimentsmentioning

confidence: 99%

“…It can be seen that the glyphosate mixture did not affect the residuals' efficiency. In this regard, Costa et al (2015b) observed optimal control with application of Smetolachlor (960 -3840 g ha -1 ) and flumioxazin (50 -125 g ha -1 ) on cassava cv. 'Baianinha'.…”

Section: Nd Experimentsmentioning

confidence: 93%

Chemical management of weeds in cassava crop, cultivar ‘Santa Helena’

et al. 2021

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“…Rainfall data observed during the experiments are shown in Figure 1. The soil in the experimental area was classified as Latossolo amarelo (EMBRAPA, 2013). Before setting up of the experiments, soil samples were collected from the experimental area, which presented the following physicochemical profile: pH in H 2 O, 5.7; H + + Al 3+ , 1.9 cmol c dm -3 ; Al 3+ , 0.03 cmol c dm -3 ; Mg 2+ , 1.4 cmol c dm -3 ; K + , 32 mg dm -3 ; P, 59 mg dm -3 ; organic matter, 1.02%; clay, 188 g kg -1 , silt, 174 g kg -1 ; sand (sandy loam texture), 638 g kg -1 .…”

Section: Methodsmentioning

confidence: 99%

“…More recently, the adoption of chemical control has substantially grown due to a significant shortage of labor in rural areas. The benefits of this method include the ease of execution and effective control of a broad spectrum of weeds (COSTA et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Efficacy and Selectivity of Herbicides Applied in Cassava Pre-Emergence

et al. 2018

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The interference imposed by weeds can cause damages to cassava development. Thus, adopting control measures is fundamental. The use of pre-emergence herbicides is one of the control alternatives, since cassava presents a good tolerance to herbicides applied in this modality. However, herbicides may present differential selectivity due to the variety of cassava that is planted. The objective of this study was to evaluate both weed control effectiveness and selectivity of different herbicide combinations applied at pre-emergence of two cassava varieties. Two experiments were established in the field using a randomized complete block design, in a split plot scheme, with four replications. In the efficacy experiment, application of six combinations of herbicides, including clomazone + ametryn, clomazone + metribuzin, clomazone + flumioxazin, isoxaflutole + ametryn, isoxaflutole + metribuzin, isoxaflutole + flumioxazin were evaluated in the main plot. In addition, a non-treated control and a weeded control were evaluated. In the subplots, the Caravela and Pretinha varieties were planted. For the selectivity experiment, a non-treated control was not included. The combinations containing clomazone presented a longer residual period of weed control as well as a better control of benghal dayflower. Metribuzin exhibited lower efficacy than other herbicide combinations containing clomazone or isoxaflutole. The Pretinha variety showed greater tolerance to weed interference. Every herbicide combination that was applied in cassava pre-emergence presented selectivity for both Caravela and Pretinha varieties.

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Selectivity and efficacy of PROTOX inhibitors in cassava varieties cultivated in clayey and sandy soils

Costa¹,

Takahashi²,

Costa³

et al. 2022

Acta Sci. Agron.

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The selectivity and efficacy of protoporphyrinogen oxidase (PROTOX) inhibitor herbicides in cassava varieties depend on product formulation, dosage, and soil texture. The aim of this study was to assess the selectivity and efficacy of flumioxazin and sulfentrazone in the cassava variety ‘IPR B36’ and the clone ‘VN 117’. Two experiments were carried out: one in a clayey soil and one in a sandy soil. Both experiments were laid in a split-plot randomized block design with three replicates. The two cassava varieties were used as main plots, with subplots consisting in 10 treatments including, flumioxazin at 50, 75, 100, and 125 g ha-1; sulfentrazone at 250, 500, 750, and 1000 g ha-1; one weed-free control, and one unweeded control. Flumioxazin (≥75 g ha-1) and sulfentrazone (≥250 g ha-1) achieved mean weed control rates > 70 and 90% in both types of soil for up to 90 days after application. Flumioxazin exhibited fewer residual effects on the cassava varieties than sulfentrazone, particularly in clayey soil. Flumioxazin was selective to the different cassava varieties planted in both soil types, whereas sulfentrazone was more selective in clayey soil. PROTOX inhibitors were effective in controlling weed growth in cassava plots, and there were no varietal differences in herbicide selectivity; however, the use of sulfentrazone should be restricted to maximum spray rates of 250 g ha-1 in sandy soils.

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

Cited by 3 publications

References 16 publications

Chemical management of weeds in cassava crop, cultivar ‘Santa Helena’

Chemical management of weeds in cassava crop, cultivar ‘Santa Helena’

Efficacy and Selectivity of Herbicides Applied in Cassava Pre-Emergence

Selectivity and efficacy of PROTOX inhibitors in cassava varieties cultivated in clayey and sandy soils

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