Primeira ocorrência de &lt;i&gt;Pythium&lt;/i&gt; sp. e &lt;i&gt;Rhizoctonia&lt;/i&gt; sp. causando podridão-de-raízes em ervais no Rio Grande do Sul.

Poletto, Igor; Muniz, Marlove Fátima Brião; Ceconi, Denise Ester; Weber, Maria Nevis Deconto; Blume, Elena

doi:10.5902/198050981936

Cited by 12 publications

(11 citation statements)

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“…A doença causa necrose do sistema radicular e, consequentemente, redução no desenvolvimento e na produção, podendo, nos casos mais graves, causar a morte da planta. Nos ervais atacados as perdas na produtividade podem chegar a 30% (POLETTO et al, 2006;POLETTO et al, 2007).…”

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Influência da inoculação de <i>Fusarium</i> spp. e níveis de sombreamento no crescimento e desenvolvimento da erva-mate

Poletto

Muniz²,

Ceconi³

et al. 2010

Ciênc. Florest.

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RESUMOA erva-mate (Ilex paraguariensis A. St.-Hil.) é uma espécie amplamente cultivada no sul do Brasil e países vizinhos. Suas folhas e galhos finos, preparados segundo método apropriado, fornecem o mate ou chimarrão, o mais popular chá consumido no Brasil e exportado para todo o mundo. Com o aumento da área plantada, sobretudo na última década, os problemas fitossanitários causados por pragas e doenças aumentaram e, dentre estes, a podridão-de-raízes vem se tornando um dos principais. A doença é causada por Fusarium spp. e provoca sérios danos decorrentes da destruição do sistema radicular, ocasionando, nos casos mais graves, morte da planta. A erva-mate é uma espécie que habita o sub-bosque da mata e o cultivo de forma homogênea a pleno sol pode ser um fator estressante ocasionando menor crescimento e desenvolvimento e também torná-la mais susceptível à podridão-de-raízes. Assim, foram instalados experimentos na área do Viveiro Florestal pertencente ao Departamento de Ciências Florestais da Universidade Federal de Santa Maria com o objetivo de confirmar tais hipóteses. O experimento foi desenvolvido em um esquema fatorial (2 x 5), composto pela inoculação de Fusarium spp. e por níveis de sombreamento. Foi observado que plantas submetidas aos menores níveis de sombreamento ou a pleno sol tiveram seu desenvolvimento prejudicado e ficaram mais suscetíveis à doença. As plantas inoculadas com Fusarium spp. tiveram menor desenvolvimento em comparação com as não inoculadas, especialmente nos menores níveis de sombreamento. Palavras-chave: Ilex paraguariensis; mudas; parâmetros de crescimento. ABSTRACTThe erva-mate (Ilex paraguariensis A. St.-Hil.) is a species broadly cultivated in southern Brazil and neighboring countries, whose leaves and fine branches, prepared according to the appropriate method, make the mate or "chimarrão", the most popular tea consumed in Brazil and exported around the world. With an increasing planted area, mainly in the last decade, phytosanitary problems caused by pests and disease have increased in this crop and root-rot is becoming one of the main problems. The disease is caused by Fusarium spp. and it causes serious damage to the roots, in the most serious cases, leading to the death of 1. Parte da dissertação do primeiro autor.

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Influência da inoculação de <i>Fusarium</i> spp. e níveis de sombreamento no crescimento e desenvolvimento da erva-mate

Poletto

Muniz²,

Ceconi³

et al. 2010

Ciênc. Florest.

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“…and Siparuna guianensis, where inhibited in 50% of most phytopathogens tested, future studies are necessary where the combination of essential oils should be done as in the work done by Bortolotto et al (2018), where they claim that the combination of essential oils can have synergistic effects between their components as studied in the case of allyl isothiocyanate and essencial oil of A. sativum, these compounds are constituents of the aforementioned oils, cinnamaldehyde/eugenol, thymol/eugenol, carvacrol/eugenol and thymol/carvacrol (Pei et al, 2009). In a study of Sa et al (2017) isolated and identified sesquiterpenes (α-bisabolol, bisabolol B oxide and α-cadinol), hydrocarbons (n-pentacosane and n-tetracosane), the steroid (β-sitosterol) and the flavonoids (quercetin, kaempferol, guaijaverine), This study enabled the isolation of substances responsible for the antimicrobial activity of Myrcia tomentosa. Al-Ja'fari et al (2011) confirm that these same compounds have antifungal activity, and were used against three yeast and five fungal strains, with a moderate result, but the author believes that a different fraction should be done in further studies by adding other compounds to exhibit better antimicrobial activity (Sa et al, 2017;al-Ja'fari et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

“…In a study of Sa et al (2017) isolated and identified sesquiterpenes (α-bisabolol, bisabolol B oxide and α-cadinol), hydrocarbons (n-pentacosane and n-tetracosane), the steroid (β-sitosterol) and the flavonoids (quercetin, kaempferol, guaijaverine), This study enabled the isolation of substances responsible for the antimicrobial activity of Myrcia tomentosa. Al-Ja'fari et al (2011) confirm that these same compounds have antifungal activity, and were used against three yeast and five fungal strains, with a moderate result, but the author believes that a different fraction should be done in further studies by adding other compounds to exhibit better antimicrobial activity (Sa et al, 2017;al-Ja'fari et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

“…Although the focus is small, the statistics are of great economic importance. Crops are attacked through fast-track pathogens such as soybean white mold by Sclerotinia sclerotiorum, root rotten in several crops by Fusarium solani, guava leaf spot (Pestalotiopsis guepinii), cocoa black pod disease caused by three Phytophthora species, and bean root rot by Rhizoctonia solani (Poletto et al, 2007;Khaledi, et al, 2015;Jagana et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Many plants with fungicidal or fungistatic potential have been studied for use in plant disease control, as well as raw material for the formulation of new alternative products (Garcia et al, 2012). Among these plants Persea major, Rosmarinus officinalis L., Allium sativum L., Cryptocarya aschersoniana Mez., Ocotea odorifera Vell., Cymbopogon citratus, Siparuna guianensis Aubl., Syzygium aromaticum, Myrcia splendens, Myrcia tomentosa Aubl., Hymenaea courbaril L., Piper nigrum L., Thymus vulgaris L. and Bixa Orellana L. (Passone et al, 2012;Andrade et al, 2013;Silva et al, 2014;Alves et al, 2015;Sa et al, 2017). Little is known about the effect of the essential oils obtained from these medicinal species on the aforementioned fungi.…”

Section: Introductionmentioning

confidence: 99%

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Bioprospecting of bioactive essential oils against phytopathogenic fungi

Araújo¹,

Cordeiro²,

Araújo³

et al. 2019

Amaz. Jour. of Plant Resear.

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Diseases caused by fungi pose risks to modern agriculture globally. The most commonly used control is the chemical, but the indiscriminate use of these products causes risks of environmental contamination and of rural workers. In the search for alternative methods of control, essential oils appear, which are natural plant products with antifungal, antibacterial and insecticidal properties, and present less risk to the environment. The objective of this work was to evaluate the in vitro antifungal activity of essential oils on the inhibition of mycelial growth of phytopathogenic fungi. The essential oils of bush avocado (Persea major), rosemary (Rosmarinus officinalis L.), garlic (Allium sativum L.), cinnamom-fire (Cryptocarya aschersoniana Mez.), sassafras cinnamom (Ocotea odorifera Vell.), lemon grass (Cymbopogon citratus), capitiu (Siparuna guianensis Aubl.), India clove (Syzygium aromaticum), guamirim (Myrcia splendens) guava brava (Myrcia tomentosa Aubl.), jatoba (Hymenaea courbaril L.), black peper (Piper nigrum L.), thyme (Thymus vulgaris L.) and annatto (Bixa orellana L.) against fungi Fusarium solani, Pestalotiopsis guepinii, Phytophthora spp., Rhizoctonia solani and Sclerotinia sclerotiorum. The mycelial growth of these fungi was evaluated by means of the Petri dish mycelial growth inhibition index containing the potato, dextrose, agar environment in the concentration of 1,000 μl/mL of the essential oils. The design was completely randomized with three replications. Among the essential oils used, the thyme and India clove promoted complete inhibition of all fungi tested. Garlic essential oil and lemon grass completely inhibited the mycelial growth of three of the five fungi tested. These results demonstrate the importance of the oils for the alternative control of phytopathogens.

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Biocontrol of Fusarium spp. root rot in yerba mate (Ilex paraguariensis) by native rhizospheric Trichoderma spp.

Quevedo,

Muniz,

Sarzi

et al. 2024

BioControl

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Primeira ocorrência de <i>Pythium</i> sp. e <i>Rhizoctonia</i> sp. causando podridão-de-raízes em ervais no Rio Grande do Sul.

Cited by 12 publications

References 2 publications

Influência da inoculação de <i>Fusarium</i> spp. e níveis de sombreamento no crescimento e desenvolvimento da erva-mate

Influência da inoculação de <i>Fusarium</i> spp. e níveis de sombreamento no crescimento e desenvolvimento da erva-mate

Bioprospecting of bioactive essential oils against phytopathogenic fungi

Biocontrol of Fusarium spp. root rot in yerba mate (Ilex paraguariensis) by native rhizospheric Trichoderma spp.

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