Seletividade de herbicidas em mudas das espécies nativas Acacia polyphylla, Enterolobium contortisiliquum (Fabaceae), Ceiba speciosa e Luehea divaricata (Malvaceae)

Monquero, Patrícia Andréa; Penha, Alessandra dos Santos; Orzari, Izabela; Hirata, Andréia Cristina Silva

doi:10.1590/s0100-83582011000100018

Cited by 17 publications

(21 citation statements)

References 26 publications

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“…A redução na produção de massa seca da parte aérea também foi observada para diferentes doses de imazapyr, sulfentrazone e glyphosate em mudas de Acacia polyphylla, indicando suscetibilidade da espécie aos produtos aplicados. O metribuzin foi seletivo para a A. polyphylla, porque não causou redução na produção de massa seca da parte aérea da planta (MONQUERO et al, 2011).…”

Section: Resultsunclassified

Seletividade de herbicidas em trevo-branco no estádio fenológico de expansão do primeiro trifólio

et al. 2013

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Section: Resultsunclassified

Seletividade de herbicidas em trevo-branco no estádio fenológico de expansão do primeiro trifólio

et al. 2013

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“…Christoffoleti et al (1998) observed that imazapyr is completely selective for Pinus spp., that tolerates applications before and after transplanting, whose doses provide longer residual weed control. Monquero et al (2011) also verified that this herbicide was selective in Ceiba speciosa seedlings and Luehea divaricata, however, in its higher level, it caused phytotoxicity with necrosis and deformation of leaves and shoots but did not inhibit the plant development.…”

Section: Resultsmentioning

confidence: 63%

“…According to Brancalion et al (2009), this very same effect occurred with the setoxidim herbicide in seedlings of Senna multijuga and Guazuma ulmifolia Lam. Monquero et al (2011) also verified that the leaves of Kielmeyera lathrophyton were damaged but gradually recovered as they grew older. From 21 DAA, the seedlings showed more intense toxicity symptoms as the herbicide level was doubled.…”

Section: Resultsmentioning

confidence: 67%

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Selectivity of herbicides in native forest species of cerrado

Polini¹,

Mendoça²,

Teodoro³

2018

Biosci. J.

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A aggravating problems in forest management is weed interference, which is a factor that modifies adaptation and reduces plant growth. The use of herbicides is an indispensable practice to mitigate these effects in reforestation areas. This study aimed to evaluate the selectivity of glyphosate and imazapyr in native plants of the Brazilian Cerrado, such as: Schinus terebinthifolia (Anacardiaceae), Peltophorum dubium (Fabaceae) and Handroanthus albus (Bignoniaceae). The trial was carried out in a greenhouse at Unit of Aquidauana/UEMS. Experimental design was completely randomized, with seven treatments and five replications. Selectivity of the herbicides in the seedlings of these species was evaluated at 7, 14, 21, 28 and 60 days after application (DAA) of the herbicides, by means of a percentage scale of notes, where 0% corresponds to no injury and 100% corresponds to plant death. At the same time, for the weed control evaluation, visual analysis was also performed at 7, 14, 21, 28 and 60 DAA of the herbicides, where 100% was considered plant death and 0% no injury to weed. Imazapyr herbicide, when applied in the initial post-emergence in its lower level, it is selective to the tree species, but in the other concentrations it can affect differently the survival of them. Glyphosate herbicide was the least selective to the tree species in its different concentrations, causing phytotoxic effects with changes in the seedlings morphology. The results of this study could help in the integrated management of weeds and contribute to the efficient herbicide use in planting forest species in the Cerrado.

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“…In order to counteract infesting weeds, it is common to use herbicides that block the germination of seeds or the establishment of weed seedlings [2].…”

Section: Introductionmentioning

confidence: 99%

Determination of Paraquat in Several Commercially Available Types of Rice

Lima¹,

Nicoletti²,

Munhoz³

et al. 2018

FNS

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Introduction: Paraquat (1,1'-dimethyl-4,4'-bipyridine-dichloride) is a herbicide used to combat weeds and improve crop productivity. Its acute toxicity can cause fatal poisoning in humans and animals and several studies have shown a strong correlation between paraquat and Parkinson's disease. Objective: To determine the concentration of paraquat in different types of rice in Brazil. Method: Paraquat quantification is based on a complexation reaction with sodium dithionite, which generates a blueish color compound, whose absorbance was read in a spectrophotometer at the 600 nm wavelength. Results: Five samples were found to be above the maximum allowed limit, while one sample had a concentration in the upper allowed limit. The method employed did not allow quantification of black rice. Conclusion: There is a need for identification of the type of pesticide used in each examined crop as well as their respective dates of remission in order to improve the safety of agricultural practices.

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Seletividade de herbicidas em mudas das espécies nativas Acacia polyphylla, Enterolobium contortisiliquum (Fabaceae), Ceiba speciosa e Luehea divaricata (Malvaceae)

Cited by 17 publications

References 26 publications

Seletividade de herbicidas em trevo-branco no estádio fenológico de expansão do primeiro trifólio

Seletividade de herbicidas em trevo-branco no estádio fenológico de expansão do primeiro trifólio

Selectivity of herbicides in native forest species of cerrado

Determination of Paraquat in Several Commercially Available Types of Rice

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