Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/50049
Título: Antagonism of Plant Pathogens by Calotropis procera
Palavras-chave: Stem and pod dryness
White mold
Calotropis procera
Plant extracts
Silk cotton
Secura do caule e da vagem
Mofo branco
Extratos de plantas
Data do documento: 2021
Editor: Canadian Center of Science and Education
Citação: CARDOSO, K. D. N. et al. Antagonism of Plant Pathogens by Calotropis procera. Journal of Agricultural Science, Ottawa, v. 13, n. 4, p. 120-127, 2021. DOI: 10.5539/jas.v13n4p120.
Resumo: Phomopsis sojae and Sclerotinia sclerotiorum are responsible for stem and pod dryness and white mold in soybean. These pathologies directly affect the quality of seeds/grains and compromise the entire plant. The use of extracts from different plants has been the subject of research for the control of several phytopathogens. Calotropis procera is among botanical species that synthesize efficient compounds for biocontrol. In this context, the aim of this study was to evaluate the in vitro effect of C. procera aqueous extract on P. sojae and S. sclerotiorum. The experiment was carried out in completely randomized blocks in a 2 × 5 factorial scheme (two fungi and five extract concentrations 0%, 5%, 10%, 15% and 20%) with 4 replicates. C. procera aqueous extract concentrations were added to Petri dishes containing PDA. After 48 hours, the mycelial growth rate was evaluated. After seven days of incubation, the fungal colony area, sporulation, and germination of P. sojae and S. sclerotiorum were evaluated. There was significant interaction between fungi × extract concentrations (p < 0.05) for all variables analyzed. The mycelial growth rate of P. sojae was lower than that of S. sclerotiorum. The diameter of the P. sojae fungal colony was smaller than that of S. sclerotiorum when concentrations of 5%, 10% and 15% were used. As the extract concentration increased, fungi sporulation and germination reduced.
URI: http://repositorio.ufla.br/jspui/handle/1/50049
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