SciELO - Scientific Electronic Library Online

 
vol.44 número4Condições de atmosfera controlada para armazenamento de ameixas "Laetitia' tratadas com 1-metilciclopropenoFrutos do umbuzeiro armazenados sob atmosfera modificada e ambiente em diferentes estádios de maturação índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Revista Ciência Agronômica

versão On-line ISSN 1806-6690

Resumo

BIGATON, Daísa et al. Evaluation of the fungicidal activity of extracts and essential oils on Asian soybean rust. Rev. Ciênc. Agron. [online]. 2013, vol.44, n.4, pp.757-763. ISSN 1806-6690.  https://doi.org/10.1590/S1806-66902013000400012.

Extracts and essential oils from plants have a great potential to control phytopathogens due to their direct fungitoxic action, inhibiting mycelial growth and spore germination, and their ability to induce the accumulation of phytoalexins in plants. The objective of this work was to evaluate the effect of different methanol extracts and essential oils on Asian soybean rust (Phakopsora pachyrhizi). The experiment was carried out in a green house and incubator. A completely randomized experimental design of seven treatments and ten replications was used. The soybean cultivar was BRS 245RR; the treatments consisted of essential oils and methanol extracts of the genus Schinus terebinthifolius (Brazilian pepper tree) and Trichilia silvatica (quebra-machado, catiguá-vermelho), the surfactant, Tween 80 (1% v/v), and water, as a control. The plants were sprayed with their respective treatments, and then artificially inoculated with the fungus about 24 hours later. The characteristics analysed were: number of leaflets per plot; chlorophyll index, plant height, intensity of the Asian soybean rust, number of leaflets with rust, number of leaflets with a burnt appearance. The plants sprayed with 5% (m/v) Schinus extract, and 1% (v/ v) Schinus oil showed greater intensity of the disease compared to those sprayed with water. These two treatments and 1% Trichilia oil caused an increased incidence of burned leaflets, indicating phytotoxicity to the crop.

Palavras-chave : Biocontrol; Fungicides; Phakopsora pachyrhizi.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons