Controle de Macroptilium lathyroides com herbicidas aplicados em pré e pós-emergência

Concenço, Germani; Andrés, A.; Galon, Leandro; Pontes, Cristiano Silva; Correia, Vinicius Talhari

doi:10.7824/rbh.v11i1.144

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…The increase in the accumulation of shikimate and in the absorption, cell penetration, and translocation of glyphosate as a result of adding herbicides that inhibit PPO may explain the increased efficacy of the mixture glyphosate + carfentrazoneethyl under full sunlight conditions. Concenço et al (2012) observed that the application of glyphosate alone was effective in the control of weeds even when it was performed at a later stage; however, carfentrazone-ethyl was only effective when applied after initial emergence. In the present study, the herbicides were applied whilst the plants were budding, which may be the reason for the poor control of M. atropurpureum observed when carfentrazone-ethyl was applied.…”

Section: Resultsmentioning

confidence: 99%

Levels of shading and application of glyphosate and carfentrazone-ethyl in the control of Macroptilium atropurpureum

Costa

Santos

Ferreira

et al. 2018

Rev. bras. eng. agríc. ambient.

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Variations in environmental conditions, such as the availability of light, can affect the efficacy of herbicides because they alter the biological characteristics of plants including those that are related to the plant’s sensitivity to herbicides. Therefore, the objective of the present study was to assess the influence of environments with different light availabilities, and of the application of glyphosate and carfentrazone-ethyl (separately or in combination) on the morphophysiology and control of Macroptilium atropurpureum. An experimental design of randomized blocks with five replicates was used, with treatments arranged in a split-plot design. The plots were composed of three levels of shading (full sunlight, 50% shading, and 70% shading); within each plot there were sub-plots, one for each of the two herbicides (glyphosate and carfentrazone-ethyl), used either separately or in combination. The doses of glyphosate + carfentrazone-ethyl applied in the treatments were 0+40 g ha-1 of carfentrazone-ethyl, 1.440+0 g ha-1 of glyphosate, 1.080+30 g ha-1 of glyphosate + carfentrazone-ethyl, and there was an additional treatment that did not include the application of an herbicide. Plants of M. atropurpureum cultivated under shading exhibited higher sensitivity to the herbicides, greater leaflet area, and lower photosynthetic rates than plants cultivated under full sunlight conditions. Under shading, both herbicides applied separately or in combination were effective in controlling M. atropurpureum, which indicates a greater susceptibility of this species to these herbicides in environments with light restriction. The species was tolerant to the two tested herbicides, used either alone or in combination, when grown under full sunlight conditions.

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Section: Resultsmentioning

confidence: 99%

Levels of shading and application of glyphosate and carfentrazone-ethyl in the control of Macroptilium atropurpureum

Costa

Santos

Ferreira

et al. 2018

Rev. bras. eng. agríc. ambient.

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“…This is an annual with erect growth, up to 1.5 m height, used for conservation of degraded areas and animal feed (Fuentes et al, 2010;Castell-Puchades et al, 2016). However, due to its wide adaptability (found in areas with low and erratic rainfall and flooding conditions), short reproductive cycle, and nonlimiting seed availability, it has been reported as a weed, mainly in soybeans, rice, and guava (Concenco et al, 2012;Ciotti et al, 2014;Hoyos et al, 2015;Silva et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Morphological and productive characterization of Macroptilium lathyroides (L.) Urb. native to the semi-arid region of Brazil

Albuquerque,

Santos,

Angulo

et al. 2024

Agraria

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Fifteen accessions of Macroptilium lathyroides (L.) Urb. were collected in three semi-arid Brazilian municipalities and evaluated to characterize their morphology and yield in a greenhouse for three 60-day growth cycles. In the first two cycles, chlorophyll a and b, carotenoids, and soil plant analysis development index (SPAD) were estimated, and root dry mass was determined in the third cycle. Data were analyzed by analysis of variance and Kruskall-Wallis test when appropriate. Principal component analysis and clustering were performed for all accessions. Leaf length, leaf number, leaf mass and total aerial mass production differed between accessions and growth cycles. Root dry mass differed between accessions and SPAD index and stem dry mass between growth cycles. The first two principal components (representing 67% of the variation) generated three clusters based on leaf and leaflet length, plant height, and total aerial mass. The variation in plant height, leaf number, and leaf and total aerial mass in all accessions of M. lathyroides indicates that there is merit in collecting further germplasm of this species to support future breeding programs. Access 62F (Bom Jardim) stands out considering most of the morphological and productive.

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“…It is characterized as a legume with great nitrogen fixing capacity, and can be used as green fertilizer (Lorenzi, 2000); In several regions of Brazil it is used as forage for grazing (Vasconcelos et al, 2011). However, M. lathyroides has become a problematic invasive plant for soybean and maize crops and pasture areas (Concenço et al, 2012), due to its characteristics of adaptability to different environments and short reproductive cycle.…”

Section: Introductionmentioning

confidence: 99%

Cytotoxic and Genotoxic Effects of Macroptilium lathyroides

et al. 2018

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The monitoring of phytochemicals with potentially toxic properties can be assessed by observing the physiological and cellular alterations of the test organism exposed. This present study aimed to evaluate the cytotoxic and genotoxic potential of aqueous extracts of leaves and roots of Macroptilium lathyroides weed on the cell cycle of lettuce. Bioassays were conducted in a germinator (25 oC) with aqueous extract at concentrations of 0, 5, 10, 20 and 40% p v-1, obtained from fresh leaves and roots. For biological, lettuce root meristems were used for the preparation of slides using the technique of squashing. All blades were observed with an optical microscope at a magnitude of 400x. A total of 5,000 cells were analyzed for each treatment, and the number of cells in each phase of mitosis was recorded. Possible presence of chromosomal abnormalities was verified, such as chromatid breaks, anafasic bridges, loss of whole chromosomes or micronuclei formation. These analyzes were conducted only on a qualitative level. Results showed that aqueous extracts of M. lathyroides mitotic caused reduced index with increased concentration. Genotoxic activity was also observed for both extracts tested, since composition resulted in cell cycle changes and chromosomal abnormalities.

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Controle de Macroptilium lathyroides com herbicidas aplicados em pré e pós-emergência

Cited by 5 publications

References 8 publications

Levels of shading and application of glyphosate and carfentrazone-ethyl in the control of Macroptilium atropurpureum

Levels of shading and application of glyphosate and carfentrazone-ethyl in the control of Macroptilium atropurpureum

Morphological and productive characterization of Macroptilium lathyroides (L.) Urb. native to the semi-arid region of Brazil

Cytotoxic and Genotoxic Effects of Macroptilium lathyroides

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