Allelopathic potential of Cover Crops in Control of Shrubby False Buttonweed (Spermacoce verticillata)

Vargas, L.; Passos, A. M. A. dos; Karam, D.

doi:10.1590/s0100-83582018360100052

Cited by 9 publications

(5 citation statements)

References 20 publications

(38 reference statements)

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“…Although not evaluated in this research, the weed suppression observed in the treatment with M. deeringiana may have been caused by the release of allelochemicals. Several studies pointed out the allelopathic power of legumes such as M. deeringiana and C. ensiformis on other plants (Pereira et al, 2018;Vargas et al, 2018).…”

Section: /9mentioning

confidence: 99%

Phytosociology and cover analysis in the suppression of weeds from an Amazonian agrosystem

Gama

Leite

Pinheiro

et al. 2020

Agraria

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Weeds can occur in cultivated areas, competing with crops and causing considerable losses. Herbicides are the basis of weed control; however, they are questionable due to their possible negative impacts on human health and the environment. An alternative for controlling weeds is using cover plants. This study aimed to determine the floristic composition of weeds in an Amazonian agrosystem with cover plants and to evaluate the production of biomass, the soil cover rate and the weed suppression potential of cover plants. The experimental design was in randomized blocks, in a 4 x 2 factorial scheme. The factors under study were the cover species (Brachiaria ruziziensis, Canavalia ensiformis, Mucuna deeringiana) and the control group that consisted of weeds, evaluated during two agricultural years (2017 and 2018), with four replicates. Digitaria horizontalis was the most important weed species and was completely suppressed by B. ruziziensis. This cover type had a large production of biomass, greater coverage of the soil and high suppression of weeds in the Amazonian agrosystem.

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Section: /9mentioning

confidence: 99%

Phytosociology and cover analysis in the suppression of weeds from an Amazonian agrosystem

Gama

Leite

Pinheiro

et al. 2020

Agraria

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“…Porcentaje de germinación (% G) y velocidad del índice de germinación (SGI) de la hierba B. pilosa en presencia de extractos acuosos de forraje (mijo perla y crotalaria). Studies demonstrating the chemical and physical effects of cover crops of different species on invasive plants have been recurrent (5,18,21,23,26). Sturm et al (2018) claimed that knowledge of the proportions of allelopathic and competitive effects could lead to the development of cover crop consortia with optimal weed suppression characteristics in the field.…”

Section: Resultsmentioning

confidence: 99%

Effect of forage aqueous extracts on Glycine max L. Merr., Zea mays L. and Bidens pilosa L.

et al. 2022

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The aim of the present study was to investigate the potential allelopathic effects of isolated or intercropped aqueous forage extracts on the physiological performance of soybean [Glycine max (L.) Merr.] and corn (Zea mays L.) seeds, as well as their phytotoxicity to the weed species Bidens pilosa L. Aqueous extracts were prepared at a concentration of 5%, and the tests with soy and corn were conducted by wetting the germination papers with different treatments and performing procedures within the standards of the Brazilian Rules of Seed Analysis. Tests with the cover plant extracts on the seeds of B. pilosa used BOD-type repetitions. Fifty weed seeds were placed in a gerbox with filter paper moistened with the different treatments with five repetitions. Distilled water was used as the control in all tests. Extracts of Avena strigosa Schreb and Raphanus sativus L. (radish), cultivated individually and in combination, increased the seed germination percentage (%G) and the length of soybean seedlings. Similarly, extracts of Pennisetum glaucum (L.) R.Br and Crotalaria spectabilis Roth, in individual and combined cultivation, provided gains in corn %G. Furthermore, all tested extracts suppressed germination and decreased the speed of the germination index of the hairy beggarticks when compared to the control, with the radish extract showing the greater reduction effect on the %G of the weed plant B. pilosa. Highlights: The use of Crotalaria as a cover crop has a positive effect on the initial growth of corn. The use of black oat and forage radish intercropped had the potential to increase soybean yield. The use of cover crops contributes to the integrated management of weeds. The choice of cover plant is important for the success of crop rotation.

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“…Além do efeito físico de restrição da luminosidade, as plantas de cobertura também exercem efeito alelopático no controle de vassourinha-de-botão. Vargas et al (2018) observaram maiores inibições de germinação de vassourinhade-botão com uso de Cajanus cajan, Urochloa brizanha cv. Xaraés, Mucuna cinereum, M. aterrima, Canavalia ensiformis, Crotalaria juncea, C. spectabilis e U. ruziziensis.…”

Section: Resultsunclassified

Emergência e Crescimento Inicial de Vassourinha-de-Botão em Diferentes Profundidades de Semeadura e Texturas de Solo

et al. 2022

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A vassourinha-de-botão (Spermacoce verticillata; Rubiaceae) tem ganhado destaque, principalmente, no Centro-Oeste e Nordeste do Brasil. A escolha do método de manejo está relacionada à biologia desta planta daninha. O objetivo deste trabalho foi avaliar a emergência de vassourinha-de-botão em diferentes profundidades de semeadura e em diferentes texturas do solo. O experimento foi realizado em vasos com capacidade de 1L, em casa de vegetação na Universidade Estadual de Londrina-PR. Os tratamentos foram organizados em delineamento inteiramente casualizado, com quatro repetições, em esquema fatorial 7 x 2, sendo 7 profundidades de semeadura (superfície; 0,5; 1; 2; 3; 4 e 5 cm), e 2 texturas de solo (textura média: 30% de argila; e textura argilosa: 60% de argila). As avaliações de emergência foram realizadas aos 12, 19, 26 e 33 dias após a semeadura. Aos 33 dias, foram efetuadas avaliações de altura das plantas, comprimento de raízes e massa seca. Os dados foram submetidos à análise de variância e ao teste de Tukey (p<0,05). Os resultados indicam que a vassourinha-de-botão emerge e se desenvolve melhor quando semeada em superfície e a 0,5 cm de profundidade. Profundidades a partir de 1 cm a emergência foi praticamente inexistente. Altura, crescimento radicular e massa seca de plantas foram maiores nos tratamentos semeados na superfície, seguidos da semeadura a 0,5 cm de profundidade, principalmente, em solo de textura média. Conclui-se que a vassourinha-de-botão apresenta maior emergência e crescimento inicial em solo de textura média, principalmente, quando semeada na superfície do solo, indicando a necessidade de luz para a emergência. Isso indica que tanto o enterrio das sementes quanto a presença de palhada na superfície do solo são boas estratégias de manejo de vassourinha-de-botão. Palavras-chave: Spermacoce verticillata. Biologia de Plantas Daninhas. Germinação. Textura de Solo. Manejo Integrado de Plantas Daninhas. Abstract The occurrence of the false-button weed (Spermacoce verticillata; Rubiaceae) has gained prominence mainly in the Midwest and Northeast regions of Brazil. The choice of management method is related to the biology of this weed. The objective of this work was to evaluate a false buttonweed emergence at different sowing depths and in different soil textures. The experiment was conducted in 1L vases, in a greenhouse at the State University of Londrina-PR. The treatments were organized in a completely randomized design, with four replications, in a 7 x 2 factorial scheme, with 7 sowing depths (surface; 0.5; 1; 2; 3; 4 and 5 cm), and 2 soil textures (medium texture: 30% clay; and clayey texture: 60% clay). Emergence assessments were performed at 12, 19, 26 and 33 days after sowing. At 33 days, plant height, root length and dry mass were evaluated. Data were submitted to analysis of variance and Tukey's test (p<0.05). The results indicate that the false-button weed emerges and grows better when sown on the surface and at 0.5 cm depth. From depths of 1 cm, emergence was practically non-existent. Height, root development and plant dry mass were higher in treatments sown on the surface, followed by sowing at 0.5 cm depth, mainly in medium textured soil. It is concluded that the false buttonweed presents greater emergence and initial growth in medium textured soil, especially when sown on the soil surface, indicating the need for light for emergence. This indicates that both the seeds’ burying and the presence of straw on the soil surface are good strategies for the management of false buttonweed . Keywords: Spermacoce verticillata. Biology Weed. Germination. Soil Texture. Integrated Weed Management.

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Allelopathic potential of Cover Crops in Control of Shrubby False Buttonweed (Spermacoce verticillata)

Cited by 9 publications

References 20 publications

Phytosociology and cover analysis in the suppression of weeds from an Amazonian agrosystem

Phytosociology and cover analysis in the suppression of weeds from an Amazonian agrosystem

Effect of forage aqueous extracts on Glycine max L. Merr., Zea mays L. and Bidens pilosa L.

Emergência e Crescimento Inicial de Vassourinha-de-Botão em Diferentes Profundidades de Semeadura e Texturas de Solo

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