Lixiviação de imidazolinonas em resposta a diferentes manejos de irrigação em solo de cultivo de arroz irrigado

Bundt, Angela Da Cas; Avila, Luis Antônio de; Agostinetto, Dirceu; Refatti, João Paulo; Cassol, Luciano Luis; Rockemback, Fernanda Costa

doi:10.1590/0103-8478cr20131216

Cited by 7 publications

(4 citation statements)

References 15 publications

(12 reference statements)

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“…Firmino et al (2008) observed higher leaching of Imazapyr in soils with sandy texture in relation to the clayey soil. It was observed leaching of the Imazapyr, after simulation of rain of 40 mm h -1 (Souza et al, 1999), and when used in soil columns (Bundt et al, 2014).…”

Section: Soil Physical Attributesmentioning

confidence: 92%

Imazapic interaction and mobility in soil cultivated with sugarcane in northeast Brazil

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Maciel

Xavier

et al. 2021

RBRH

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In the plantation of sugarcane, Imazapic has used pre- or post-emergence, alone or in combination with other herbicides. When applied to the soil in pre-emergence, Imazapic can undergo the sorption, leaching and/or degradation processes due to physical, chemical and biological effects, besides being absorbed by weeds. The objective of this work was to evaluate the interaction and mobility of the Imazapic herbicide in the soil where the soil columns with a dystrophic Yellow Ultisol (YUd) and a dystrophic Red-Yellow Oxisol (RYOd) from northeastern Brazil were used. The higher adsorption potential of the RYOd is associated with higher clay content, higher Fed and Feo concentrations, and soil acidic pH. The CDE – 2 sorption sites model adequately represented the experimental data from the Imazapic breakthrough curves to the RYOd and YUd soils. From the Kd partition coefficients for RYOd and YUd, high values of the GUS index (5.94 and 7.04, respectively) were calculated, confirming the high leaching potential of the Imazapic molecule in these soils.

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Section: Soil Physical Attributesmentioning

confidence: 92%

Imazapic interaction and mobility in soil cultivated with sugarcane in northeast Brazil

Assis

Maciel

Xavier

et al. 2021

RBRH

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“…These data corroborated those obtained by KRAEMER et al (2009), who reported imazethapyr at a depth of 20cm. BUNDT et al (2014) observed imidazolinones leaching at depths up to 40cm. Toxic effects on bioindicator rice plants were not observed in the last evaluated soil layer, and for the imazethapyr + imazapic 1X treatment, phytotoxic effects at the layer of 15-20cm were observed.…”

Section: Resultsmentioning

confidence: 90%

Leaching and residual activity of imidazolinone herbicides in lowland soils

et al. 2017

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Herbicides used in the Clearfield® rice (Oryza sativa L.) production system have a potential for leaching. This can result in contamination of underground water resources and cause injury to not tolerant crops that are sown in a succession and/or crop rotation. The objective of this study was to determine the leaching potential and the residual activity of the herbicides used in the Clearfield® rice system. The experiment was conducted over a period of two years and consisted of conducting a field test to be followed by two bioassays with a year of difference between their implementation. Initially an experiment was conducted in lowland area where it was planted the cultivar of rice ‘PUITA INTA CL’. Approximately one and two years thereafter, soil samples from each plot were collected at intervals of 5cm to a depth of 30cm (B factor) for the bioassay to evaluate persistence of herbicides. Factor A was composed of mixtures formulated of imazethapyr + imazapic (75 + 25g a.i. L-1), imazapyr + imazapic (525 + 175g a.i. kg-1) in two doses, imazethapyr (100g a.i. L-1) and treatment control without application. Basing on results, it was concluded that the mixtures imazethapyr + imazapic, imazapyr + imazapic and imazethapyr leached into the soil, reaching depths of up to 25cm in lowland soil. Imidazolinone herbicides used today in the irrigated rice Clearfield® system are persistent in soil, and their phytotoxic activity can be observed up to two years after application.

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“…One of the examples found in the literature is when there is no aerobic degradation of imazethapyr in flooded soils or in soils with a water depth close to the soil surface (Kraemer et al, 2009), leading to leaching. Bundt et al (2014) compared the leaching of different herbicides belonging to the imidazolinone group and found that imazapic is more leached than imazethapyr and imazapyr.…”

Section: Introductionmentioning

confidence: 99%

Weed Management in Rice under Sprinkler and Flood Irrigation Systems

et al. 2018

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This study aimed to assess the efficiency and selectivity of herbicides in rice submitted to sprinkler and flood irrigation systems. The experimental design was a randomized block design arranged in a 2 × 9 factorial scheme. Factor A consisted of irrigation systems (sprinkler and flood) and Factor B consisted of herbicide treatments (T1 - control; T2 - imazethapyr + imazapic, 75 + 25 g a.i. ha-1; T3 - imazethapyr + imazapic, 150 + 50 g a.i. ha-1; T4 - imazapic + imazapyr, 73.5 + 24.5 g a.i. ha-1; T5 - imazapic + imazapyr, 147 + 49 g a.i. ha-1; T6 - imazethapyr, 106 g a.i. ha-1; T7 - imazethapyr, 212 g a.i. ha-1; T8 - sequential application of imazethapyr + imazapic, 75 + 25 g a.i. ha-1; and T9 - sequential application of imazapic + imazapyr, 73.5 + 24.5 g a.i. ha-1). The application of imazethapyr and formulated mixtures of imazethapyr + imazapic and imazapyr + imazapic provided a control higher than 97% in flood and sprinkler irrigation systems. Herbicide selectivity is not altered in the sprinkler irrigation system when compared to the flood irrigation system.

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Lixiviação de imidazolinonas em resposta a diferentes manejos de irrigação em solo de cultivo de arroz irrigado

Abstract: RESUMO Os herbicidas utilizados no Sistema Clearfi eld

Cited by 7 publications

References 15 publications

Imazapic interaction and mobility in soil cultivated with sugarcane in northeast Brazil

Imazapic interaction and mobility in soil cultivated with sugarcane in northeast Brazil

Leaching and residual activity of imidazolinone herbicides in lowland soils

Weed Management in Rice under Sprinkler and Flood Irrigation Systems

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