Manejo de plantas daninhas na cultura da mandioca

Silva, D.V.; Santos, J.B.; Ferreira, E.A.; Silva, A.A.; França, André Cabral

doi:10.1590/s0100-83582012000400025

Cited by 38 publications

(46 citation statements)

References 21 publications

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“…The most common and effective method for the control of chickpea blight is the application of fungicides, such as mancozeb, chlorothalonil, and triphenyltin hydroxid. However, fungicidal control is uneconomical, unsustainable and hazardous to the environment (Pande et al, 2007;Christoffoleti et al, 2008;Silva et al, 2012). The best alternative to chemical pesticides is the use of plant based natural compounds (Hernandez-Terrones et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Management of Ascochyta rabiei by Chenopodium album Extracts

et al. 2016

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-Chenopodium album, leaves were selected to evaluate their antifungal potential against Ascochyta rabiei causative agent for chickpea blight. Different concentrations of methanolic extract of C. album leaves i.e. 1%, 2.5%, 4%, 5.5% and 7% were tested against the target fungus A. rabiei. Maximum reduction in the test fungal biomass (68%) was observed in 7% concentration. This methanolic leaf extract was partitioned and n-butanol, chloroform, n-hexane, ethyl acetate fractions were isolated according to their polarity. In vitro antifungal activity of these fractions was studied by serial dilution method. n-hexane fraction exhibited the highest antifungal potential with 55% inhibition in test fungal biomass, so this fraction was selected for Gas chromatography mass spectrometry (GC-MS) analysis. Total thirteen compounds identified in this analysis belonged to class aromatic hydrocarbons, hydrocarbons, saturated fatty acids, aromatic carboxylic acid, siloxanes, phosphonates and cardiac glycosides. These compounds might be responsible for antifungal activity of C. album.Keywords: antifungal potential, bathu, GC-MS, methanolic extract. RESUMO -Foram selecionadas folhas de Chenopodium album, para avaliação do potencial antifúngico contra o Ascochyta rabiei, agente causal da praga do grão de bico. Diferentes concentrações do extrato metanólico das folhas de C. album (1%, 2.5%, 4%, 5.5% e 7%) foram testadas contra o fungo-alvo

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Section: Introductionmentioning

confidence: 99%

Management of Ascochyta rabiei by Chenopodium album Extracts

et al. 2016

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“…Thus, chemical control appears to be an excellent alternative for the control of weeds in cassava cultures for allowing intervention in large areas with little dependence on manpower and due to its quick application (Silva et al, 2012;Silveira et al, 2012). However, in Brazil only ametryna+clomazone, clethodim, clomazone, isoxaflutole and metribuzin are registered herbicides for cassava cultures (Rodrigues & Almeida, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…According to Silva et al (2012), there are several molecules of herbicides that allowed satisfactory research results on the control of weeds, being selective for cassava, but they are still pending on register. Among these products we can cite S-metolachlor, which showed to be selective and can be included in the weeds management programs (Silva et al, 2009;Biffe et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Selectivity of clomazone and S-metolachlor applied after cassava pruning

et al. 2013

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-The objective of this work was to evaluate the selectivity of clomazone in two formulations and S-metolachlor applied on shoots of different sizes after pruning of 'Baianinha' cassava. The experiment was arranged in a randomized block design in a factorial 5 x 2 (5 treatments x 2 sizes of shoots after pruning -10 and 33 cm) with four replications. The herbicides evaluated were: clomazone (encapsulated suspension -900 g h -1 ), clomazone (encapsulated suspension -1,080 g ha -1 ), clomazone (emulsifiable concentrate 900 g ha -1 ), S-metolachlor (1,920 g ha -1 ) and an untreated control. During the experiment, all plots were kept free of weed interference by hand weeding. It was concluded that both the formulations of clomazone and S-metolachlor were selective when applied on both the shoot sizes evaluated. However, the application of S-metolachlor on 33 cm shoots gave higher selectivity to 'Baianinha' cassava plants. Keywords:Manihot esculenta, microencapsulated, weed, clomazone, S-metolachlor. RESUMO -Objetivou-se neste estudo avaliar a seletividade do clomazone em duas formulações e do S-metolachlor aplicados em diferentes tamanhos de brotos depois da poda da mandioca Baianinha. O delineamento experimental utilizado foi o de blocos ao acaso, em esquema fatorial 5 x 2 (5 tratamentos x 2 tamanhos de brotos após a poda -10 e 33 cm), com quatro repetições. Os herbicidas

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“…Silva et al, (2012) demonstraram que a capina também favorece uma nova infestação de plantas invasoras após a retirada, o que compromete a eficiência de controle deste tratamento. Ainda assim, segundo os autores, a capina é um dos métodos de manejo mais utilizado para alguns cultivos.…”

Section: Tratamentosunclassified

Manejo Alternativo De Plantas Invasoras No Sudeste Paraense

Pereira¹,

Oliveira²,

Costa³

2017

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RESUMOPlantas invasoras são todas as espécies de plantas exóticas em dado ecossistema, por interferir negativamente na produção de determinado cultivo comercial, são muito conhecidas também como "ervas-daninhas". O objetivo do presente estudo, foi avaliar a eficiência do feijão-de-porco (Canavalia ensiformes) no controle de agressividade de plantas invasoras em um plantio de maracujá de uma propriedade onde se desenvolve a agricultura familiar, no sudeste paraense. Para isto, utilizou-se o delineamento experimental de blocos ao acaso, com seis repetições e os seguintes tratamentos: (T0) Testemunha; (T1) Feijão-de-porco (Canavalia ensiformes), (T2) Roçagem manual e (T3) Capina. Cada uma com 3,00 x 7,00 m, em um total de 24 parcelas. Além disto, foram efetuados um levantamento florístico da área e as plantas daninhas identificadas utilizando-se um quadrado de madeira de 0,60 x 0,60m, arremessado 20 vezes ao acaso sobre linhas transversais em formato de X. A partir disto, observou-se uma grande variação de plantas invasoras no cultivo agrícola, no qual houve predominância de Gramínea (Digitaria ciliares). Os dados indicaram ainda que o tratamento com feijão-de-porco foi o mais eficiente no controle das plantas invasoras (63,86%), enquanto que a roçagem manual e a capina não diferiram significativamente. Já para a quantidade de frutos por parcela, nenhum dos tratamentos apresentou diferença significativa. Dessa forma, mesmo sem contribuir com o aumento na produtividade do plantio de maracujá, notou-se que o feijão-de-porco apresentou eficiência na inibição do desenvolvimento de plantas invasoras. PALAVRAS-CHAVE: Cultivo comercial. Manejo. Plantas daninhas. ALTERNATIVE MANAGEMENT OF INVASIVE PLANTS IN THE SOUTHEAST PARAENSEABSTRACT Invasive plants are all species of plants rejected in a given ecosystem, because they negatively interfere in the production of a particular commercial crop, they are also

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Manejo de plantas daninhas na cultura da mandioca

Cited by 38 publications

References 21 publications

Management of Ascochyta rabiei by Chenopodium album Extracts

Management of Ascochyta rabiei by Chenopodium album Extracts

Selectivity of clomazone and S-metolachlor applied after cassava pruning

Manejo Alternativo De Plantas Invasoras No Sudeste Paraense

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