Uso de extratos vegetais no controle in vitro do Colletotrichum gloeosporioides penz. Coletado em frutos de mamoeiro (Carica papaya L.)

Ferreira, Elzivan Felix; José, Abel Rebouças São; Bomfim, Marinês Pereira; Porto, John Silva; Jesus, Jailson Silva de

doi:10.1590/0100-2945-223/13

Cited by 10 publications

(9 citation statements)

References 7 publications

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“…The aqueous extract of Z. officinale at a concentration of 5% inhibited the growth of C. gloeosporioides by 39.99%. As reported by Ferreira, et al [19], the aqueous extract of L. alba at a 8% concentration inhibited of C. gloeosporioides growth by 41.9%.…”

Section: Resultssupporting

confidence: 62%

Antimicrobial Activity of Alcoholic Extracts of Medicinal Plants against Phytopathogenic Fungi

Silva

Ishida

Lemos

et al. 2019

JEAI

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Aims: This work aimed to evaluate the antimicrobial effects of 14 alcoholic extracts of medicinal plants on the mycelial growth of Colletotrichum gloeosporioides, Fusarium oxysporum f. sp. passiflorae, Fusarium solani and Rhizoctonia solani. Those are fungi that cause diseases in Passiflora edulis. Study Design: With the obtained data the mycelial growth rate index (MGRI) was calculated, afterwards the analysis of variance was performed and the means were compared by the Scott-Knott test at 5% probability. Place and Duration of Study: Plant Pathology Laboratory, Embrapa Eastern Amazon, Belém, Pará, Brazil, between May 2014 and April 2015. Methodology: The extracts were prepared with 1.0 g of powdered plant material and 10 mL of commercial ethyl alcohol 92.8º (0.1 g mL-1) under constant agitation in an orbital shaker at 200 rpm for 20 minutes. They were then kept in the refrigerator for 24 hours at rest. The extracts were centrifuged and filtered on Millipore membranes with 0.22 µm porosity. The tests with the phytopathogenic fungi were carried out in vitro with the alcoholic extracts at 1% concentration. The experimental design was completely randomized with 15 treatments and 5 replicates. Results: All the extracts reduced the growth of the fungi C. gloeosporioides. The extracts the Eucalyptus angulosa, Lippia alba, Zingiber officinale, Cymbopagon citratus, Azadirachta indica, Plectranthus barbathus, Hibiscus sabdariffa, Aloe vera, Pedilanthus tithymaloides, Mansoa alliacea and Chenopodium ambrosioides reduced the mycelial growth of F. oxysporum f. sp. passiflorae. Only the extract of E. angulosa presented reduction in the growth of F. solani. Meanwhile the extracts of E. angulosa, Z. officinale, L. alba, M. alliacea and P. barbathus reduced the mycelial growth of R. solani. Conclusion: All extracts presented antimicrobial potential, being that the extract of E. angulosa reduced the mycelial growth of all the evaluated fungi.

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Section: Resultssupporting

confidence: 62%

Antimicrobial Activity of Alcoholic Extracts of Medicinal Plants against Phytopathogenic Fungi

Silva

Ishida

Lemos

et al. 2019

JEAI

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“…Pode-se averiguar que todos os extratos de priprioca foram ativos frente a F. oxysporum e S. sclerotiorum. A ação antifúngica de extratos vegetais frente a fungos fitopatogênicos tem sido avaliada por inúmeros autores (DOMINGUES et al, 2009;FERREIRA et al, 2014;KASPER et al, 2018c;KASPER et al, 2018d) O extrato etanólico de priprioca inibiu o crescimento fúngico na concentração 250 µg/mL, apresentando efeito fungicida na concentração 1000 µg/mL frente a F. oxysporum, sendo inativo frente a S. sclerotinia e M. phaseolina. Já o extrato etanólico do resíduo sólido de priprioca apresentou efeito inibitório na concentração 125 µg/mL e fungicida na concentração 250 µg/mL para F. oxysporum.…”

Section: Discussionunclassified

Aproveitamento dos resíduos de priprioca (Cyperus articulatus L.) no controle alternativo de fungos fitopatogênicos

Kasper¹,

Sousa²,

Martin³

et al. 2020

RICA

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Fungos fitopatogênicos são responsáveis por doenças que causam grandes perdas agrícolas. O tratamento convencional é realizado por agrotóxicos e embora esses produtos reduzam significativamente as perdas, ocasionam sérias contaminações ambientais, contribuem para o surgimento de patógenos resistentes e eliminam agentes de controle biológico natural. Produtos naturais obtidos de plantas, como óleos essenciais e extratos, possuem substâncias bioativas que têm demonstrado potencial atividade antifúngica. A priprioca (Cyperus articulatus L.) é uma planta encontrada na Amazônia, muito utilizada no preparo de colônias artesanais. A alguns anos, o óleo essencial da espécie se tornou matéria-prima da Perfumaria Nacional e seu cultivo passou a ser em escala comercial, tornando-se fonte de renda para comunidades do entorno de Belém/PA. No processo de obtenção de óleo essencial são gerados grandes quantidades de resíduo sólido (massa vegetal após a retirada do óleo essencial). Esse trabalho teve como objetivo a avaliação e comparação da atividade antifúngica do óleo essencial, extrato hexânico e etanólico de priprioca e extrato hexânico e etanólico do resíduo sólido de priprioca, visando o aproveitamento dos resíduos no controle de fitopatógenos responsáveis por grandes perdas na produção agrícola. Para tanto, óleo essencial foi extraído por hidrodestilação (6h) e os extratos obtidos via Soxhlet (8h). Foram avaliadas as Concentrações Mínimas Inibitórias (CMI) pelo método de microdiluição e a Concentração Fungicida Mínima (CFM) para os tratamentos ativos. Foram avaliadas as concentrações de 1000 a 15,625 µg/mL frente a Fusarium oxysporum, Sclerotinia sclerotiorum e Macrophomina phaseolina. Os extratos etanólicos e hexânico do resíduo sólido apresentaram maior atividade antifúngica, principalmente frente a S. sclerotiorum, sendo fungicidas a 125 e 250 µg/mL, respectivamente. O óleo essencial foi inativo frente aos fitopatógenos teste. Tais resultados indicaram a eficácia dos extratos do resíduo de priprioca frente a fungos fitopatogênicos. O resíduo sólido é gerado em grandes quantidades durante a extração do óleo essencial e não possui valor agregado, tornando-o candidato a matéria-prima de produtos sustentáveis e de baixo impacto ambiental, que atuem no controle alternativo de fungos fitopatogênicos.

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“…The control of these diseases has been achieved through continuous chemical spraying programs, but the use of these products causes several undesirable consequences when used improperly. Thus, alternatives to control possible post-harvest diseases and meet the needs of producers and consumers have been studied, with emphasis on the use of extracts with antimicrobial activity, aiming to reduce the use of pesticides (BRITO et al, 2011;FERREIRA et al, 2014;NASCIMENTO;NERY;RODRIGUES, 2008).…”

Section: Introductionmentioning

confidence: 99%

Post-Harvest Storage of Papaya Fruits Coated With Extracts of Leaves and Fruits of Neem

Freitas

Souza

Senhor³

et al. 2018

Rev. Caatinga

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The objective of the present work was to evaluate the use of extracts of leaves and fruits of neem (Azadirachta indica Juss) as coating for papaya Formosa fruits aiming to maintain their quality during post-harvest storage. A completely randomized experimental design in a 5x5 factorial arrangement was used, with 3 replications of 2 papaya fruits per plot. The treatments consisted of five coatings with extracts of neem leaves and fruits (leaf extracts at 5 and 10%, fruit extracts at 5 and 10% and a control treatment without coating) and five storage periods (0, 3, 6, 9 and 12 days) under mean temperature of 30.4 °C and relative humidity of 42%. The fruit weight loss, external appearance, pulp firmness, titratable acidity and soluble solids were evaluated, and the fungi species on the fruit surface of each storage were identified and quantified. The treatments with extract of neem leaves and fruits at 5% had papaya fruits with best external quality and provided best control of growth of phytopathogenic fungi. Regarding external appearance, papaya fruits coated with extracts of neem leaves and fruits at 5% had a shelf life of 12 days, while those coated with extracts at 10% had a shelf life of 9 days.

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Uso de extratos vegetais no controle in vitro do Colletotrichum gloeosporioides penz. Coletado em frutos de mamoeiro (Carica papaya L.)

Cited by 10 publications

References 7 publications

Antimicrobial Activity of Alcoholic Extracts of Medicinal Plants against Phytopathogenic Fungi

Antimicrobial Activity of Alcoholic Extracts of Medicinal Plants against Phytopathogenic Fungi

Aproveitamento dos resíduos de priprioca (Cyperus articulatus L.) no controle alternativo de fungos fitopatogênicos

Post-Harvest Storage of Papaya Fruits Coated With Extracts of Leaves and Fruits of Neem

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