Phytotoxic
Mostrando 13-24 de 109 artigos, teses e dissertações.
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13. PHYTOTOXIC CONSTITUENTS FROM ENDOPHYTIC FUNGUS Xylaria cubensis ASSOCIATED WITH Eugenia brasiliensis
The upscaling of Xylaria cubensis, an endophyte of Eugenia brasiliensis (Myrtaceae), in PDB medium led to the isolation of known compounds including cytochalasin D (7) and cytochalasin C (8), which exhibited relatively higher phytotoxic activity in all the concentrations tested compared to the commercial herbicide GOAL®. Besides the aforementioned metabolit
Quím. Nova. Publicado em: 18/07/2019
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14. Bioassay for Determining Persistence of the Herbicide Saflufenacil in an Oxisol
RESUMO: A persistência de um herbicida é definida como a habilidade para manter a integridade da molécula e suas propriedades químicas, físicas e fitotóxicas no ambiente onde ele foi aplicado. O conhecimento da persistência tem implicações tanto sobre a toxicidade gerada sobre espécies cultivadas em sucessão quanto sobre o período em que o herbic
Planta daninha. Publicado em: 13/06/2019
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15. African star grass response to postemergence herbicides
RESUMO A grama estrela africana (Cynodon nlemfuensis Vanderyst) é considerada excelente forrageira. Contudo, há poucas informações disponíveis sobre o manejo de plantas daninhas em áreas de grama estrela. Dois experimentos foram realizados em 2017 e 2018 para avaliar a resposta da grama estrela africana a herbicidas pós-emergentes. Os tratamentos fora
Ciênc. agrotec.. Publicado em: 27/05/2019
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16. Phytotoxic Potential of the Crude Extract and Leaf Fractions of Machaerium hirtum on the Initial Growth of Euphorbia heterophylla And Ipomoea grandifolia
RESUMO: Alelopatia é o termo utilizado para definir qualquer processo envolvendo metabólitos secundários produzidos por plantas e microrganimos que influenciem no crescimento e desenvolvimento de sistemas agrobiológicos. Na atualidade, busca-se encontrar aleloquímicos de interesse e saber como aplicá-los em bio-herbicidas para combater plantas daninhas
Planta daninha. Publicado em: 08/04/2019
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17. A study of the phytotoxic effects of the aerial parts of Senecio westermanii Dusén (Asteraceae) on Lactuca sativa L. and Allium cepa L. seeds
The objective of this study was to evaluate the effects of the ethanolic crude extracts and fractions of the species Senecio westermanii Dusén on Lactuca sativa L. (lettuce) and Allium cepa L. (onion) seeds. We assessed the germination, growth, root respiration and photosynthesis of the target species in Petri dishes (9.0 cm diameter) containing filter pape
Braz. J. Pharm. Sci.. Publicado em: 29/11/2018
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18. Essential Oils for Alternative Teak Rust Control
ABSTRACT The objectives of this study were to evaluate the effect of lemon grass, citronella grass, Mexican-tea and noni essential oils on urediniospore germination of Olivea neotectonae , the agent responsible for rust in Teak (Tectona grandis L.f.); to evaluate the phytotoxic effect of these essential oils on teak seedlings; and to evaluate the use of ess
Floresta Ambient.. Publicado em: 29/03/2018
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19. Triterpenoides, fenólicos e efeito fitotóxico das folhas de Eugenia flavescens DC (Myrtaceae)
This research deals with the chemical study and evaluation of the phytotoxic effects of the methanol extract of E. flavescens leaves. The compounds were isolated using classic chromatographic techniques and the identification of the phenolic profile was proposed from the HPLC/DAD/MS-MS data. Structure elucidation of the compounds was performed by 1H and 13C
Quím. Nova. Publicado em: 2017-04
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20. Selection, isolation, and identification of fungi for bioherbicide production
Abstract Production of a bioherbicide for biological control of weeds requires a series of steps, from selection of a suitable microbial strain to final formulation. Thus, this study aimed to select fungi for production of secondary metabolites with herbicidal activity using biological resources of the Brazilian Pampa biome. Phytopathogenic fungi were isolat
Braz. J. Microbiol.. Publicado em: 2017-03
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21. Phytotoxicity of Perlatolic Acid and Derivatives
ABSTRACT Perlatolic acid (1), methyl perlatolate (2), and the products of perlatolic acid alcoholysis-namely, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, and n-hexyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (3-11)-were evaluated for their herbicidal potential on Lactuca sativa L. (lettuce) and Allium cepa L. (onion) seeds. Th
Braz. arch. biol. technol.. Publicado em: 01/08/2016
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22. Seasonal variation in allelopathic potential of the leaves of Copaifera langsdorffii Desf.
ABSTRACT The deciduous plant Copaifera langsdorffii contains important medicinal compounds which may also be allelopathic and inhibitory to plant growth. The species is endemic to the Brazilian Cerrado where there is pronounced climatic seasonality. In this study we demonstrate the allelopathic capacity of extracts from the leaves of C. langsdorffii and pre-
Acta Bot. Bras.. Publicado em: 15/03/2016
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23. CONSTITUINTES QUÍMICOS E ATIVIDADE FITOTÓXICA DAS FOLHAS DE
Annona nutans The phytochemical investigation and evaluation of the phytotoxic effect of the extract and fractions obtained from the leaves of
Annona nutans (R. E. Fr.) R. E. Fr. were performed. Phytotoxic activity was assessed on radicle and hypocotyl ofAllium cepa andLactuca sativa , where chloroform and ethyl acetatQuím. Nova. Publicado em: 2015-06
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24. Phytotoxic and antioxidant activity of seven native fruits of Brazil
We investigated antioxidant capacity, phenolic content and phytotoxic effects in seven species of fruit native to Brazil: Acrocomia aculeata, Hymenaea stigonocarpa, Tamarindus indica, Byrsonima intermedia, Psidium firmum, Myrciaria cauliflora and Ficus obtusifolia. Phytotoxic effects were assessed from crude ethanol extracts and semipurified fractions. In fo
Acta Bot. Bras.. Publicado em: 2013-12