Sorption and desorption of indaziflam degradates in several agricultural soils

Alonso, Diego Gonçalves; Oliveira, Rubem Silvério de; Koskinen, William C.; Hall, Kathleen E.; Constantin, Jamil; Mislankar, Suresh

doi:10.1590/0103-9016-2015-0106

Cited by 12 publications

(8 citation statements)

References 8 publications

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“…The reduction in the effects of indaziflam on the root system in the treatments where bovine manure was used may be associated to the increase in the microbial community in the seedling rhizosphere. In addition, Braga (2017), when studying indaziflam sorption in soils with organic matter addition, and Alonso et al (2016), evaluating the behavior of this herbicide in different soils, conclude that the sorption of this herbicide is directly correlated with the increase in the organic matter of the soil. In this study, the addition of organic matter, in the form of manure, may have reduced the availability of herbicide in the soil solution near the seedlings, thus reducing its damage to the root system.…”

Section: Resultsmentioning

confidence: 99%

Indaziflam Application in Newly Transplanted Arabica Coffee Seedlings

Gomes¹,

Pucci²,

Alves³

et al. 2019

C.Sci.

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<p>Weed management is one of the main and most problematic cultural practices used in coffee plantations. Slow growth, broad spacing associated with scarce registered products for weed control at an early crop stage, are the main problems faced by producers. Therefore, it is desirable for new herbicidal molecules to be registered for this crop, as is the recent case of indaziflam. This study aimed to know the influence of indaziflam on the morphological characteristics of coffee plants and to propose alternatives to reduce its effects on plants. Therefore, the effects of this herbicide on two arabica coffee cultivars were studied, as well as the association of this herbicide with protection of the seedling collar (PVC pipes and bovine manure). Controls on weeds, possible intoxications on seedlings and effects on the main morphological characteristics of coffee plants were evaluated. The morphological growth of cultivar 144 is naturally higher than that of cultivar IBC 12. Although treatments with the use of indaziflam cause intoxication in the seedlings, a reduction in plant damage was observed over time, and the damage was insignificant. In general, it was observed that cultivar IBC 12 suffered minor intoxications, but it is more sensitive to the presence of indaziflam, since it presented greater damage in the morphological variables. The use of manure with the PVC pipe can be an alternative to reduce the effects of this herbicide, as it reduced the effects of the product on the root system of this cultivar. It is concluded that the application of indaziflam causes mild symptoms in coffee plants independent of the planted cultivar. Indaziflam causes reduction in seedling morphology, and this effect is dependent on the cultivar used. The use of manure associated to the PVC pipe can be an alternative to reduce the effects of indaziflam, mainly in the root system of coffee plants.</p>

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Section: Resultsmentioning

confidence: 99%

Indaziflam Application in Newly Transplanted Arabica Coffee Seedlings

Gomes¹,

Pucci²,

Alves³

et al. 2019

C.Sci.

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“…3 , broken circles show the more reactive zones in each molecule Figure 7. Isosurfaces of the Fukui Functions for FDAT according to equations (10), (11) and (12) at the wB97XD/6-311++G(2d,2p) level of theory employing the PCM solvation model In the case of (a) electrophilic, b) nucleophilic and c) free radical attacks. In all cases the isosurfaces were obtained at 0.008 e/u.a.…”

Section: Local Reactivity Parametersmentioning

confidence: 99%

“…8 Moreover, these metabolites being more polar than the parent compound showed lower sorption; 9 therefore, they have the potential to persist and leach to groundwater. 10 Here, it is important to remind that the leaching potential of a herbicide is directly connected to the contamination of water resources in the underground. 11 In this sense, IND has been detected in soil samples collected at each depth, suggesting movement with irrigation water.…”

mentioning

confidence: 99%

Analysis of the Chemical Reactivity of Indaziflam Herbicide and Its Metabolites Through Global and Local Reactivity Descriptors

Mendoza-Huízar

Ríos-Reyes²,

Álvarez-Romero

et al. 2019

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In the present work, the chemical reactivity of indaziflam N-[(1R,2S)-2,3-dihydro-2,6-dimethyl-1H-inden-1-yl]-6-[(1R)-1-16 fluoroethyl]-1,3,5-triazine-2,4-diamine so called indaziflam (IND) and its metabolites: triazine indanone (ITI), indaziflam carboxylic acid (ICA) and fluoroethyldiaminotriazine (FDAT) was analyzed. The calculations were performed at the X/6-311++G(2d,2p) (where X=B3LYP, M06, M06L and wB97XD) level of theory, in the aqueous phase. The results indicate that ITI is the more reactive followed by ICA, IND and FDAT. The distribution of the active sites was determined evaluating the Fukui function employing the frozen core and finite difference approximations. For electrophilic attacks, IND shows the more reactive zone on the benzene ring, ITI and ICA on the nitrogen atom in the central section and FDAT on its nitrogen atoms. The more nucleophilic sites for IND are observed on the carbon atoms of triazine, on the carbonyl group for ITI, on the carboxylic group for ICA, and on the nitrogen atoms of triazine for FDAT. For free radical attacks case, the more reactive sites for IND are on the benzene and triazine rings, on the carbonyl group, nitrogen of the central section, and nitrogen atoms of triazine, for ITI, carboxylic group for ICA, and on the nitrogen atoms of triazine ring for FDAT.

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“…Keywords: alkylazine, chemical control, residual effect, weeds. baixíssimo potencial de impacto no ambiente no que diz respeito ao potencial de contaminação de águas subsuperficiais (Alonso et al, 2015(Alonso et al, , 2016.…”

Section: Introductionunclassified

Uso potencial do novo herbicida indaziflam em pomares de banana

Silva

Biffe²,

Catapan³

et al. 2017

RBHerbicidas

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O controle de planta daninhas é um trato cultural essencial para o desenvolvimento adequado das bananeiras, entretanto, existem poucas opções de herbicidas registrados para a cultura. A partir deste contexto, o objetivo deste trabalho foi avaliar a seletividade e a eficiência do novo herbicida indaziflam em pré-emergência das plantas daninhas quando aplicado em jato dirigido às entrelinhas da cultura da banana, visando ao controle de Conyza bonariensis, Digitaria horizontalis e Cenchrus echinatus. O experimento foi realizado a campo no delineamento em blocos ao acaso, avaliando-se sete tratamentos com quatro repetições. Os tratamentos foram constituídos pelo indaziflam aplicado em pré-emergência nas doses de 50, 75, 100 e 125 g ha-1 i.a; pelo glyphosate aplicado em pós-emergência (1920 g ha-1 e.a); além de uma testemunha absoluta (sem capina e sem herbicida) e de uma testemunha capinada. O indaziflam nas doses de 75, 100 e 125 g ha-1 i.a proporcionou excelente controle de todas as plantas daninhas presentes por um período de 120 dias após a aplicação. Todas as doses de indaziflam aplicadas em pré-emergência das plantas daninhas na entrelinha da cultura da banana foram seletivas, não havendo nenhum sintoma de injúria visual ou efeito negativo na produtividade, o que indica que este novo herbicida apresenta potencial de utilização nesta cultura.

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Sorption and desorption of indaziflam degradates in several agricultural soils

Cited by 12 publications

References 8 publications

Indaziflam Application in Newly Transplanted Arabica Coffee Seedlings

Indaziflam Application in Newly Transplanted Arabica Coffee Seedlings

Analysis of the Chemical Reactivity of Indaziflam Herbicide and Its Metabolites Through Global and Local Reactivity Descriptors

Uso potencial do novo herbicida indaziflam em pomares de banana

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