Data/hora: 05/06/2024 16:17:55

Biblioteca(s): | Embrapa Meio Ambiente.
Data corrente: | 01/08/2022
Data da última atualização: | 22/11/2022
Autoria: | TERAO, D.; QUEIROZ, S. C. do N. de; MAIA, A. de H. N.
Afiliação: | DANIEL TERAO, CNPMA; SONIA CLAUDIA DO N DE QUEIROZ, CNPMA; ALINE DE HOLANDA NUNES MAIA, CNPMA.
Título: | Bioactive compound isolated from Conyza canadensis combined with physical treatments for the control of green mould in orange.
Ano de publicação: | 2022
Fonte/Imprenta: | Journal of Phytopathology, v. 170, n. 3, p. 158-166, 2022.
ISSN: | 0931-1785
DOI: | https://doi.org/10.1111/jph.13063
Idioma: | Inglês
Conteúdo: | Abstract: Green mould, caused by Penicillium digitatum, is the major postharvest disease of citrus in all producing countries. The control of this disease is carried out by fungicides in postharvest treatments, which can leave toxic residues in fruits. Therefore, the interest in cleaner technologies and alternatives to the use of fungicides, such as biopesticides, has grown in recent years. Conyza canadensis, an herbaceous weed spread all over the world, contains compounds which have significant activity against P. digitatum. Thus, the present research aimed to evaluate (4Z)-lachnophyllum lactone (LACH), isolated from C. canadensis, in combination with hot water brushing (HWB) and UV-C treatments, to control green mould and to preserve the quality of the fruit. LACH efficiently controlled green mould in orange cv. Valencia. The level of control improved from 24% to 42% according to the dose of LACH adopted, ranging from 10 to 100 µg ml?1 respectively. When in combination with HWB or UV-C, the efficiency of the control was enhanced from 50% to 78% with the lowest dose of LACH (10 µg ml?1) and UV-C at 1.5 kJ m?2, which showed no significant difference when the highest dose of LACH (100 µg ml?1) was applied alone. This treatment delayed the onset of the disease symptoms. A biofungicide based on C. canadensis combined with UV-C and HWB is a potential natural control of green mould.
Palavras-Chave: | Green mold.
Thesagro: | Controle Biológico; Controle Físico; Doença de Planta; Laranja; Mofo Verde; Raio Ultravioleta; Tratamento Hidrotérmico.
Thesaurus Nal: | Hot water treatment; Molds (fungi); Oranges; Physical control; Plant diseases and disorders; Ultraviolet radiation.
Categoria do assunto: | H Saúde e Patologia
Registro original: | Embrapa Meio Ambiente (CNPMA)
Exemplares: | CNPMA - (17207-1) - UPC - AP - DD -  -  -  - DIS