Influência da textura do solo na seletividade do herbicida fomesafen aplicado em pré-emergência do algodoeiro

Karpinski, Ricardo André Kloster; Neto, Antônio Mendes de Oliveira; Guerra, Naiara; Constantin, Jamil; Oliveira, Rubem Silvério de; Maciel, Cleber Daniel de Góes; Silva, André Augusto Pazinato da

doi:10.7824/rbh.v13i2.283

Cited by 5 publications

(6 citation statements)

References 7 publications

(10 reference statements)

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“…Due to their characteristics, the herbicides evaluated here show good solubility and mobility in the soil profle. For these products with higher solubility, symptoms of intoxication tend to be more severe in sandy soils with low organic matter content [38], a contrary condition observed in the experimental area of this study, according to the soil analysis previously presented. Studies show that production environments with low content of organic matter and high content of sand have a lower sorption capacity of soil particles and consequently greater availability of herbicide molecules in the soil solution, which will be readily absorbed by plants [39].…”

Section: Study Carried Out Under Field Conditionscontrasting

confidence: 58%

Can Soil Compaction Alter Morphophysiological Responses and Soybean Yield under Application of Selective Herbicides?

Pereira,

Ferreira,

Braz

et al. 2023

Applied and Environmental Soil Science

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Compacted soils may be negatively affecting the selectivity of herbicides applied in preemergence in the soybean crop. Therefore, the present work aimed to investigate possible negative effects on the morphophysiological characters of soybean plants, as well as on the agronomic and yield performances of this crop. For this purpose, two trials were carried out, one in a greenhouse and the other under field conditions. In a greenhouse, the study was carried out in a completely randomized design in a 2 × 8 factorial, with five replications, while in the field, the design used was randomized blocks, with the treatments arranged in split-plot (2 × 8), with six repetitions. The first factor/plot corresponded to the physical condition of the soil: compacted or not compacted, while the second factor/subplot was constituted by the application of preemergence herbicides: clomazone, diclosulam, flumioxazin, S-metolachlor, [imazethapyr + flumioxazin], [pyroxasulfone + flumioxazin], and [sulfentrazone + diuron], plus a control without herbicide. In the greenhouse study, there was a significant interaction between soil compaction and herbicides applied in preemergence for the relative index of chlorophyll b and root dry mass. Furthermore, the isolated herbicide factor did not promote significant changes in any of the morphophysiological variables evaluated. Compaction alone had a negative impact on the variables relative index of chlorophyll a and carbon assimilation rate, with reductions in the values of these variables when the soybean was submitted to growth in compacted soil. For the field experiment, there were no significant interactions between the factors for any of the analyzed variables, nor the effect of herbicides alone. The isolated soil compaction factor negatively impacted the plant stand and the thousand-grain mass of soybean, showing reductions in the values of this parameter when the soybean was grown in compacted soil.

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Section: Study Carried Out Under Field Conditionscontrasting

confidence: 58%

Can Soil Compaction Alter Morphophysiological Responses and Soybean Yield under Application of Selective Herbicides?

Pereira,

Ferreira,

Braz

et al. 2023

Applied and Environmental Soil Science

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“…In addition to factors related to plants, the selectivity of herbicides also depends on the type of soil, with the textural class associated with the organic matter content being one of the main factors involved in the dynamics of herbicides in the soil (Silva and Silva, 2007;Inoue et al, 2009). As a result, the physical, chemical, and biological characteristics of the soil directly influence the sorption of the herbicide, affecting the amount of the molecule available in the solution and consequently the selectivity of herbicides applied in pre-emergence (Karpinski et al, 2014).…”

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confidence: 99%

Selectivity index of indaziflam to sugarcane cv. IACSP95-5000 in two soil textures

Ghirardello

Araújo

Baccin

et al. 2021

Rev. Fac. Nac. Agron. Medellín

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Selectivity index is a way of assessing the discrimination of herbicide to a given crop by observing its effects on the crop and the weeds. The aim was to obtain the selectivity index of indaziflam herbicide to sugarcane cultivar IACSP95-5000 as a function of five weed species in two soils textures. The experiment was carried out in a greenhouse at Piracicaba, São Paulo, Brazil. The treatments consisted of indaziflam doses (0; 12.5; 25; 50; 100; 200; 400; 800 and 1,600 g of the active ingredient (ai) ha-1), applied in pre-emergence of the sugarcane and of the weeds Urochloa decumbens, Urochloa plantaginea, Digitaria horizontalis, Panicum maximum and Rottboellia cochinchinensis. In sandy loam soil, a 100% control for all weeds was provided at 25 g ai ha-1. In clay soil, for D. horizontalis the 90% reduction in total dry mass (ED90) was obtained at 25 g ai ha-1, for R. cochinchinensis at 193 g ai ha-1, for U. plantaginea at 152 g ai ha-1, for P. maximum at 124 g ai ha-1, and for U. decumbens at 94 g ai ha-1. Indaziflam was selective to IACSP95-5000 in both soils, with 10% of reduction in dry mass (ED10) at 137 g ai ha-1 for soil with a sandy loam texture and 353 g ai ha-1 for clay soil. The selectivity index was higher than 1 for all weeds in clay soil. It was not possible to obtain the selectivity index for sandy loam soil due to species susceptibility to the herbicide.

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“…The divergent results can be explained by the physical and chemical differences between soils, especially by the textural class and the organic matter content, which are factors that influence fomesafen selectivity to cotton (Karpinski et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

Selectivity of Fomesafen to Cotton

Neto¹,

Constantin

Oliveira

et al. 2015

Planta daninha

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-The aim of this work was to evaluate the selectivity of fomesafen alone or in a tank mixture with other preemergent herbicides, with or without S-metolachlor application in early postemergence in cotton plant, cultivar DP 555 BG RR ® . The design utilized was a randomized complete block, organized in a split-plot arrangement, with four replications. For that, 24 herbicides were evaluated with fomesafen (0.45 and 0.625 kg ha ) applied in early postemergence. The variables evaluated were: phytotoxicity, insertion height of the first reproductive branch, plant height, stand, number of reproductive branches per plant, number of bolls per plant, bolls weight, and productivity of cotton seed. Fomesafen alone or in a tank mixture with preemergent prometryn, diuron, trifluralin and S-metolachlor was selective to cotton plant. Preemergent fomesafen isolated application followed by the application of S-metolachlor in early postemergence was also selective. However, on average, preemergent tank mixtures applied in association with preemergent S-metolachlor early application was not selective to cotton crop.Keywords: chemical control, Protox inhibitor, tank mixture, preemergence. Palavras-chave: controle químico, inibidor da Protox, mistura em tanque, pré-emergência. RESUMO -O objetivo deste trabalho foi avaliar a seletividade da aplicação de fomesafen isolado ou em mistura com outros herbicidas em pré-emergência, associado ou não à aplicação de S-metolachlor em pós-emergência inicial

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Influência da textura do solo na seletividade do herbicida fomesafen aplicado em pré-emergência do algodoeiro

Cited by 5 publications

References 7 publications

Can Soil Compaction Alter Morphophysiological Responses and Soybean Yield under Application of Selective Herbicides?

Can Soil Compaction Alter Morphophysiological Responses and Soybean Yield under Application of Selective Herbicides?

Selectivity index of indaziflam to sugarcane cv. IACSP95-5000 in two soil textures

Selectivity of Fomesafen to Cotton

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