Fungicidal activity of essential oils from Brazilian Cerrado species against wood decay fungi

Medeiros, Fernando C. M.; Gouveia, Fernando Nunes; Bizzo, H. R.; Vieira, R. F.; Menezzi, Cláudio Henrique Soares Del

doi:10.1016/j.ibiod.2016.06.003

Cited by 43 publications

(38 citation statements)

References 36 publications

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“…Para este ensaio, foi utilizado o método descrito por Medeiros et al (2016). Esse método consiste em colocar o óleo em poço de 0,6 cm de diâmetro, perfurado no centro de placa de Petri, contendo meio de cultura, para o desenvolvimento do fungo.…”

Section: Ensaio De Toxidez Em Meio De Culturaunclassified

“…Porém, Medeiros et al (2016), ao testarem o efeito inibitório dos óleos essenciais de três plantas do Cerrado (Lippia origanoides, Lippia lacunosa e Syzygium aromaticum) aos fungos Gloeophyllum trabeum (podridão parda) e Trametes versicolor, observaram que o óleo de Lippia origanoides teve a maior atividade fungicida para os dois fungos dentre os óleos testados e que o de Lippia lacunosa teve eficiência apenas contra o Trametes versicolor.…”

Section: Ensaio De Toxidez Em Meio De Culturaunclassified

“…Produtos com iodo, utilizados no tratamento de madeira, além de controlar, devem também inibir o desenvolvimento de organismos xilófagos. No entanto, como enfatizam Medeiros et al (2016), testes em nível de campo são necessários para avaliar a real potencialidade dos óleos naturais a organismos xilófagos.…”

Section: Ensaio De Toxidez Em Meio De Culturaunclassified

“…Antes da realização dos ensaios com amostras de madeira, são empregados ensaios de triagem em meio de cultura a fim de se avaliar o potencial de toxidez dos produtos a serem testados contra os fungos xilófagos (MEDEIROS et al, 2016). Assim, vários produtos vêm sendo testados com esse intuito, com vista à obtenção de substâncias eficazes para impedir o desenvolvimento de fungos apodrecedores na madeira.…”

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Análise Física E Avaliação Do Efeito Antifúngico Dos Óleos De Andiroba, Copaíba E Pinhão-Manso

Sousa

Paes

Arantes

et al. 2018

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ResumoÓleos de andiroba, copaíba e pinhão-manso são estudados por serem empregados em fins variados, como sabões, velas, medicamentos, biodiesel, tintas, fiação de lã e lustração de móveis. Também, são utilizados como inseticidas, fungicidas e moluscicidas. Objetivou-se neste trabalho caracterizar as propriedades físicas dos óleos de andiroba, copaíba e pinhão-manso, puros ou enriquecidos com iodo sublimado (I2) e avaliar sua eficiência contra fungos de podridão parda e branca. Os óleos de andiroba e copaíba foram oriundos de comunidades do município de Santarém (PA) e o óleo de pinhão-manso, da Fazenda Tamanduá, município de Santa Terezinha (PB). Foram determinadas as características físicas (pH, índice de acidez, viscosidade e densidade) dos óleos e realizado o ensaio de toxidez em meio de cultura com fungos de podridão parda e branca. O enriquecimento dos óleos com iodo (I2) proporcionou aumento da viscosidade. Foi constatada menor densidade para o óleo puro de andiroba e copaíba do que para o enriquecido com 5% de I2. O incremento de iodo nas soluções propiciou a diminuição de pH nos óleos de andiroba e copaíba, além do aumento do índice de acidez do óleo de andiroba. Para a avaliação da eficiência, os óleos foram empregados puros ou enriquecidos com iodo sublimado. No ensaio de toxidez em meio de cultura, para o fungo Trametes versicolor, a maior inibição em 20 dias foi para o tratamento com andiroba 1% de I2. Para o fungo Postia placenta, a maior inibição foi constatada para o tratamento com óleo de andiroba com 5% de I2. Palavras-chave: Óleos vegetais, características físicas, toxidez, fungos xilófagos. AbstractPhysical analysis and assessment of the antifungal effect of Carapa guianensis, Copaifera sp., and Jatropha curcas oils. Andiroba, or crabwood (Carapa guianensis), copaiba (Copaifera sp.) and jatropha (Jatropha curcas) oils are studied since they are used for a wide range of purposes, as soaps, candles, medicines, biodiesel, paints, wool spinning, and furniture lustration. Besides, they are also used as insecticides, fungicides, and molluscicides. The objective of this study was to characterize the physical properties of andiroba, copaíba and jatropha oils and to assess their efficiency against fungus of brown and white rot. The oils of andiroba and copaiba came from communities in the municipality of Santarém (state of Pará, Brazil), and the jatropha oil, from Fazenda Tamanduá, municipality of Santa Terezinha (state of Paraíba, Brazil). The physical characteristics (pH, acidity index, viscosity, and density) of the oils were determined, and the toxicity test was carried out in culture medium with brown rot fungi. The enrichment of the oils with iodine (I2) provided higher viscosity. It was found lower density for pure andiroba and copaiba oil than for enriched oil with 5% I2. The addition of iodine in the solutions caused the decrease of pH value in the oils of andiroba and copaiba and the increase of acidity index on andiroba oil. For the assessment of efficiency, oils were tested either pure or ...

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Section: Ensaio De Toxidez Em Meio De Culturaunclassified

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Análise Física E Avaliação Do Efeito Antifúngico Dos Óleos De Andiroba, Copaíba E Pinhão-Manso

Sousa

Paes

Arantes

et al. 2018

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“…Fast-growing tree species can satisfy, to some extent, the ever-growing needs for wood. However, they produce light density wood with low mechanical properties, which are vulnerable to biological-deteriorating agents too (Hein et al, 2013;Maresi et al, 2013;Arce and Moya 2015;De Medeiros et al, 2016). Researchers are therefore trying to develop various types of engineered wood with improved properties to compensate for the above mentioned disadvantages (Mendez et al, 2013;Ozdemir and Tutus, 2013;De Almeida Andrade, 2016).…”

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Effects of Nano-Silane on the Physical and Mechanical Properties of Oriented Strand Lumber (Osl)

Taghiyari¹,

Maleki²,

Hassani³

2017

Bois for. trop.

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Cette étude s'est penchée sur les effets de la teneur en résine et en composés de nano-silane (NS) sur les panneaux structuraux orientés (OSB), un important produit en bois reconstitué. Des panneaux OSB ont été fabriqués avec de la résine d'urée-formaldéhyde (UF) à 8 % et à 10 % (sur poids sec des panneaux), avec application de NS à deux teneurs en fonction de la teneur en résine UF. Nos résultats montrent que les traitements aux deux teneurs différentes en résine donnent des valeurs très proches pour les modules de rupture et d'élasticité, la flexion au choc et la résistance à la traction. Cela indique que la compacité élevée des lamelles de la matrice OSB est le facteur déterminant des propriétés mécaniques globales des panneaux composites. L'interaction entre NS et résine UF affaiblit significativement ces propriétés dans la plupart des cas de traitement à 10 % NS, alors que le dosage de NS à 20 % est suffisant pour contribuer activement au processus de collage des lamelles et compense les pertes en partie. L'analyse par cluster indique que les propriétés mécaniques sont générale-ment davantage fonction de la compacité de la matrice composite que de la teneur en résine. Dès lors, l'étude conclut que le NS n'est pas à recommander à l'industrie en raison de ses effets négatifs sur la plupart des propriétés physiques et méca-niques des panneaux OSB.Mots-clés : nanomatériaux, panneaux structuraux orientés (OSB), panneaux de particules, composé de silane, bois composite, Zycosil, Iran. ABSTRACT EFFECTS OF NANO-SILANE ON THE PHYSICAL AND MECHANICAL PROPERTIES OF ORIENTED STRAND LUMBER (OSL)The effects of resin content and nano-silane (NS) compounds on oriented strand lumber (OSL), an important engineered wood product, were studied here. OSL panels were produced using two different urea-formaldehyde (UF) resin contents of 8% and 10%, based on the dry weight of the wood strips; two NS contents were applied based on the UF resin content. Our results show that treatments with the two different resin contents produce very similar values for modulus of rupture (MOR), modulus of elasticity (MOE), impact bending (IB), and tensile strength (TS). This revealed that the high compactness of strips in the OSL matrix was the predominant factor determining the overall mechanical properties of the composite panels. The interaction between NS and UF-resin significantly reduced these properties with most treatments at 10% NS, while 20% NS was enough to contribute actively to the process of binding the strips together and compensated for part of the loss. Cluster analysis indicated that the mechanical properties were generally dependent on the compactness of the composite matrix rather than on the resin content. Based on these findings, the study concluded that NS is not to be recommended to the industry because of its negative effects on most physical and mechanical properties in OSL panels.Keywords: nano-materials, oriented strand lumber (OSL), particleboard, silane compounds, wood-composite, zycosil , Iran. RESUMEN EFECTOS DE LOS ...

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Evaluation of fractionally distilled Picea abies TMP-turpentine on wood-decaying fungi: in vitro, microcosm and field experiments

et al. 2020

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Synthetic and heavy metal antifungals are frequently used as wood preservatives. However, they exhibit relatively inert biodegradation and toxic properties when leached; this makes their replacement with environmentally degradable yet functional alternatives a key target in the wood protection industry. In this context, distilled fractions of raw thermomechanical pulp turpentine (TMP-T) from Picea abies were assessed for their wood protecting capabilities against wood-decaying fungi. Antifungal bioactivity of fractions and some of their combinations were screened on agar-plates against the brown-rot fungus Coniophora puteana. Addition of TMP-T fractions showed a significant fungal growth rate reduction, while mixtures indicated the presence of synergistic and antagonistic effects. One fraction, obtained after distilling 1 L TMP-T at 111-177 °C at 0.5 mbar, showed complete growth inhibition of Antrodia sinuosa, Serpula lacrymans, Serpula himantioides and significant inhibition of Antrodia serialis, Antrodia xantha, Gloeophyllum sepiarium, Heterobasidion parviporum at a concentration of 1000 ppm. This fraction was further examined for long-and medium-term effects on wood decay in microcosm soiljar and field experiment, respectively. The known antifungal compounds benzisothiazolinone, 2-octyl-4-isothiazolin-3-one, 3-iodo-2-propynyl N-butylcarbamate and two commercial wood preservatives were used as reference treatments. Commercial preservatives instilled long-term efficacy against C. puteana wood decay in a soil-jar microcosm experiment, but no noticeable protection with antifungal compounds or the present treatments was found. However, a moderate effect by the TMP-T fraction from the in vitro assay was observed and the TMP-turpentine distillation residue showed a similar fungal inhibition effect to the most potent commercial treatment after 29 months in the field.

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Fungicidal activity of essential oils from Brazilian Cerrado species against wood decay fungi

Cited by 43 publications

References 36 publications

Análise Física E Avaliação Do Efeito Antifúngico Dos Óleos De Andiroba, Copaíba E Pinhão-Manso

Análise Física E Avaliação Do Efeito Antifúngico Dos Óleos De Andiroba, Copaíba E Pinhão-Manso

Effects of Nano-Silane on the Physical and Mechanical Properties of Oriented Strand Lumber (Osl)

Evaluation of fractionally distilled Picea abies TMP-turpentine on wood-decaying fungi: in vitro, microcosm and field experiments

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