Phytosociology of weeds in millet under different soil managements in savanna sul-mato-grossense

Teodoro, Paulo Eduardo; Ribeiro, Larissa Pereira; Corrêa, Caio Cézar Guedes; Júnior, Roque Apolinário Alves da Luz; Souza, Mariana C.; Simões, Mayara dos Santos; Torres, Francisco Eduardo

doi:10.14393/bj-v31n4a2015-26101

Cited by 7 publications

(7 citation statements)

References 17 publications

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“…conyzoides, E. indica, O. latifolia, and C. didymus (Figure 4B). This result indicates that even with a higher amount of dry matter and higher plants in corn areas, which would favor soil shading, an increased weed infestation was observed with those species, which is contrary to the information that only the shading phenomenon could explain the inhibition of some weeds in no-tillage areas (Teodoro et al, 2015). These results allowed us to infer that sorghum showed an inhibitory effect on the infesting community ( Figure 4A and B).…”

Section: Resultsmentioning

confidence: 59%

Potential and Persistence of the Inhibitory Effect of Sorghum on Weeds

et al. 2018

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The inhibitory interaction between plants may be an important strategy of integrated weed management (IWM). This study aimed to investigate the inhibitory effects of sorghum on phytosociology and infestation of weeds during cultivation and after harvest. An experiment was carried out in the field in a randomized block design in a split-plot arrangement. Plots consisted of sorghum and corn (control) and subplots were composed of different periods of weed community assessment after crop harvest (DAH) (0, 20, 40, 60, and 80 days). An increased number of species and botanical families was observed after harvest. Degradation of sorghum and corn straw reached the stabilization at 60 DAH. Although sorghum has presented a lower amount of straw and soil cover, weed infestation was, on average, 30% lower in relation to areas cultivated with corn. Sorghum showed an inhibitory effect on some weed species, influencing phytosociology, especially during the first 40 DAH, and can be used as part of IWM strategy.

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Section: Resultsmentioning

confidence: 59%

Potential and Persistence of the Inhibitory Effect of Sorghum on Weeds

et al. 2018

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“…Similarly, changes in the composition of weed communities were also observed in different agricultural crops, such as sugarcane (Kuva et al, 2007;Soares et al, 2011), pastures (Ferreira et al, 2014), bean (Tavares et al, 2013), cover crops (Lima et al, 2014;Lamego et al, 2015), manioc (Cardoso et al, 2013;Soares et al, 2015), corn (Correa et al, 2011), corn intercropped with legumes (Oliveira et al, 2014) and corn intercropped with forage (Batista et al, 2014;Concenço et al, 2015), millet (Teodoro et al, 2015), lettuce (Ferreira et al, 2013), Jatropha curcas (Concenço et al, 2014) and coffee under organic management (Maciel et al, 2010a;Partelli et al, 2010).…”

Section: Cynodon Dactylon and Ipomoea Grandifoliamentioning

confidence: 97%

Weed community composition in different agro-systems

et al. 2017

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Weed communities in agricultural systems are diverse and subjected to different agronomic practices. In this study, a phytosociological survey of the weed community in different cropping systems consisting of corn, horticulture, perennial cultivation of Jatropha curcas and pasture of Urochloa brizantha in Rio Verde, GO, Brazil, was carried out. Assessments were performed at the beginning (October 2011) and at the end (March 2012) of the rainy season. After identifying and counting species, were calculated the phytosociological indices of density, frequency, abundance and relative importance, as well as the diversity index of Shannon-Wiener, evenness index of Pielou and similarity coefficient of Sorense. Were found 46 species of sixteen families, especially Poaceae. The most important species were: Alternanthera tenella in the annual growth environment during the both periods; Panicum maximum (early rainy season) and Chamaescy hirta (end of the rainy season) in the vegetable garden; Eleusine indica (early rainy season) and Galinsoga parviflora (end of the rainy season) in the perennial crop and Sida rhombifolia (early rainy season) and Neonotonia wigrtii (end of the rainy season) in the pasture. Lower diversity indices and evenness were observed in the pasture environment. Sampling time presented a higher impact on similarities when compared to the different environments.Keywords: Jatropha curcas, corn, pasture, no-tillage Composição florística de comunidades de plantas daninhas em diferentes agrossistemas ResumoComunidades de plantas daninhas em agrossistemas são diversificadas devido às práticas agronômicas adotadas. Neste trabalho realizou-se um levantamento fitossociológico em comunidade de plantas daninhas em diferentes sistemas de cultivo constituídos de cultivo de milho, olericultura, cultivo perene com pinhão-manso e pastagem de Urochloa brizantha, em Rio Verde, GO, no início (outubro de 2011) e no final (março de 2012) da época chuvosa. Após identificação e contagem das espécies calcularam-se os índices fitossociológicos: densidade, frequência, abundância e importância relativa, e os índices de diversidade de Shannon-Wiener e equitabilidade de Pielou e o coeficiente de similaridade de Sorense. Encontrou-se 46 espécies, distribuídas em dezesseis famílias, com destaque para Poaceae. As espécies mais importantes foram Alternanthera tenella no ambiente de cultivo anual em ambas as épocas; Panicum maximum (início da época chuvosa) e Chamaescy hirta (final da época chuvosa) em horta; Eleusine indica (início da época chuvosa) e Galinsoga parviflora (final da época chuvosa) em cultivo perene; e Sida rhombifolia (início da época chuvosa) e Neonotonia wigrtii (final da época chuvosa) em pastagem. Menores índices de diversidade e de equitabilidade foram observados em área de pastagem. Quanto às similaridades entre tratamentos, a época foi mais determinante do que os ambientes, considerando que as semelhanças entre ambientes foram maiores dentro da mesma época amostrada, exceto para a pastagem no final da es...

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“…Therefore, the need for researches on weed control in reforestation areas with native tree species is clear (DOUST et al, 2008;MACHADO et al, 2013). Thus, identifying herbicides selective to native species would allow the use of more practical methods for controlling invasive plants and would facilitate the use of these species in commercial plantations or agroforestry systems (BRANCALION et al, 2009 (TEODORO et al, 2015;GILO et al, 2016;SANTO et al, 2017). Thus, this study aimed at assessing the selectivity of glyphosate and imazapyr in native seedlings present in Cerrado, such as Schinus terebinthifolia (Anacardiaceae), Peltophorum dubium (Fabaceae) and Handroanthus albus (Bignoniaceae).…”

Section: Introductionmentioning

confidence: 99%

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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Phytosociology of weeds in millet under different soil managements in savanna sul-mato-grossense

Cited by 7 publications

References 17 publications

Potential and Persistence of the Inhibitory Effect of Sorghum on Weeds

Potential and Persistence of the Inhibitory Effect of Sorghum on Weeds

Weed community composition in different agro-systems

Selectivity of herbicides in native forest species of cerrado

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