Efficacy of imazapic/imazapyr and other herbicides in mixtures for the control of Digitaria insularis prior to soybean sowing

Albrecht, Alfredo Júnior Paiola; Albrecht, Leandro Paiola; Silva, André Felipe Moreira; Ramos, Rômulo Augusto; Zeny, Everson Pedro; Lorenzetti, Juliano Bortoluzzi; Danilussi, Maikon Tiago Yamada; Barroso, Arthur Arrobas Martins

doi:10.15446/agron.colomb.v38n3.83046

Cited by 5 publications

(1 citation statement)

References 32 publications

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“…Considering the magnitude of the problem, it is essential to focus on integrated weed management involving a multiple set of effective practices (Harker et al, 2013;Soltani et al, 2023). This includes strategies that range from monitoring through phytosociological surveys and identification of resistance, which results in efficient agricultural control measures, such as cultural, mechanical, and chemical practices (Marochi et al, 2018;Albrecht et al, 2020a, Chauhan, 2020. For example, the combination of pre-and post-emergence herbicide application with a population of 247,000 soybean plants ha -1 was advantageous in the management of Amaranthus spp.…”

Section: Introductionmentioning

confidence: 99%

Amaranthus hybridus L. RESISTANT TO GLYPHOSATE AND CHLORIMURON IN PARAGUAY

Furlan Kashivaqui,

Krzyzaniak,

Pires

et al. 2023

Chil. j. agric. anim. sci.

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Amaranthus species are extremely problematic weeds due to their aggressiveness and resistance, being Amaranthus palmeri S. Watson, Amaranthus retroflexus L., Amaranthus tuberculatus (Moq.) J. D. Sauer, and Amaranthus hybridus L. prominent worldwide. The present research aimed to study A. hybridus populations in Paraguay where the use of glyphosate and chlorimuron herbicides presented management challenges. This research was conducted in the municipalities of Corpus Christi and Hernandarias, Paraguay, in 2016, 2017, 2018, 2019, and 2020. Weed seeds with resistance indicators were collected, cultivated, and following a screening process, cultivated for seed production (heritability up to F2), and the seeds were collected to obtain the herbicide dose-response curve. The herbicides glyphosate and chlorimuron were tested in portions of 1-8, 1-4, 1-2, 1, 2, 4, and 8 times the recommended dose on the package inserts (720 g acid equivalent (ae) ha 1 and 20 g active ingredient (ai) ha1, respectively). Among the A. hybridus populations evaluated in Paraguay, biotype from Hernandarias with multiple resistance to ALS-inhibiting (HRAC 2) and EPSPs-inhibiting (HRAC 9) herbicides, and biotype from Corpus Christi with resistance to ALS-inhibiting herbicides (HRAC 2) were found. Therefore, rotation and combination of herbicides, as well as integration with non-chemical measures, are essential to control and prevent selection of resistant biotypes. Studies aimed to develop integrated weed management plans are essential for effective control. In countries like Paraguay, this becomes imperative because of the lack of research on this topic.

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Section: Introductionmentioning

confidence: 99%

Amaranthus hybridus L. RESISTANT TO GLYPHOSATE AND CHLORIMURON IN PARAGUAY

Furlan Kashivaqui,

Krzyzaniak,

Pires

et al. 2023

Chil. j. agric. anim. sci.

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Combining capillary electrophoresis and chemometric tools for the straightforward determination of imidazolinone herbicides in plant‐based milks

Aguilera,

Almeida,

da Silva Oliveira

et al. 2024

J Sci Food Agric

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BACKGROUNDHighly polar herbicides, such as imidazolinones, are used for weed control to increase agricultural productivity and crop quality. However, their misapplication can lead to residues in ready‐to‐eat food with a potential health risk for consumers. Hence, the fast determination of these herbicides is necessary for timely action. In this work, an eco‐friendly method based on capillary zone electrophoresis combined with chemometrics was used for the determination of imazapyr and imazamox in vegetable‐based beverages such as soy and quinoa milk.RESULTSThe analytical strategy consisted of only three steps: (i) protein precipitation prior to sample injection (ii) data pre‐processing to reduce the background and make corrections on electrophoretic times shift, and (iii) resolution of fully overlapped capillary electrophoresis (CE) peaks by the well‐known partial least square (PLS) algorithm, which extracts quantitative information attributed to the analytes. The method was successfully applied in the concentration range between 1.00 and 100 μg L−1 with coefficient of determination of the calibration (R2cal) and prediction (R2pred) > 0.90, residual prediction deviation of calibration (RPDcal) and of prediction (RPDpred) > 3, and relative error of prediction (REP) > 11 in the analyzed sample matrices, in the three built methods (quinoa samples, soy samples, and joint quinoa and soy samples).CONCLUSIONThe proposed methodology offers a simple and quick alternative for determining imidazolinones at trace concentrations in vegetable beverages, such as quinoa and soy milk, without complex sample preparation. The results were consistent with those obtained using more complex techniques, confirming the applicability of this method. © 2024 Society of Chemical Industry.

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