Sequential Application of Herbicides Alone and in Mixture With and Without Foliar Fertilizer after Pruning of Cassava Plants

Costa, Nivan B. da; Salvalaggio, Adriana Cologni; Ferreira, Sílvio Douglas; Barbosa, Jaqueline de Araújo; Gibbert, Anderson Marcel

doi:10.1590/s0100-83582020380100004

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…In experiments carried out in the same region, losses in the productivity of cassava roots were also verified. However, these losses were cultivar dependent, with 38.9% in the 'Cascuda' variety (Costa et al, 2020b) and 63.5% in the 'Baianinha' variety (Franciscon et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

Weed coexistence periods in cassava varieties

Moratelli

Ferreira

Canavessi

et al. 2021

Agraria

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The competition caused by weeds in the cassava culture significantly reduces their productive potential and consequently the profitability for the producer. Thus, the objective was to determine the period prior to interference (PPI) and the period prior to damage to economic yield (PPDEY) of weeds in cassava varieties. The design used was randomized blocks in factorial 2 × 2 × 12, with four replications. The first factor was constituted by two varieties ('Baianinha' and 'Clone 56-03'), the second factor was constituted by the conditions of coexistence (with and without) of the crop with the weeds and the third factor corresponded to 12 periods (0, 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, and 220 days after planting -DAP). 'Baianinha' was less tolerant of weed competition compared to 'Clone 56-03'. Considering the use of arbitrary and economic criteria of acceptable losses in the root productivities, the PPI and PPDEY of 11 and 65 DAP were determined for 'Baianinha' and 44 and 138 DAP for 'Clone 56-03', respectively. Likewise, considering the starch productivity data, the PPI and PPDEY of 8 and 21 DAP were determined for 'Baianinha' and 38 and 84 DAP for 'Clone 56-03', respectively.

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Section: Resultsmentioning

confidence: 99%

Weed coexistence periods in cassava varieties

Moratelli

Ferreira

Canavessi

et al. 2021

Agraria

Self Cite

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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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Sequential Application of Herbicides Alone and in Mixture With and Without Foliar Fertilizer after Pruning of Cassava Plants

Cited by 2 publications

References 16 publications

Weed coexistence periods in cassava varieties

Weed coexistence periods in cassava varieties

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

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