Comparative analysis of Monilinia fructicola and M-laxa isolates from Brazil: monocyclic components of peach brown rot

Autor(es)

Angeli, Sthela Siqueira ; May De Mio, Louise Larissa ; Amorim, Lilian

• Tipo de documento: Artigo Científico
• Fonte: Ciência Rural; v. 47, n. 6 2017.
• Citações Web of Science: 3

Resumo

Brown rot is the most important disease of peaches in Brazil. The objective of this study was to compare the brown rot monocyclic components from Monilinia fructicola and M. laxa isolates from Brazil on peaches, due to the detection of M. laxa in the Sao Paulo production area. Conidia germination and pathogen sporulation were assessed in vitro under a temperature range of 5-35 degrees C and wetness duration of 6-48h. Incubation and latent periods, disease incidence, disease severity and pathogen reproduction on peach fruit were evaluated under 10, 15, 20, 25 and 30 degrees C and wetness duration of 6, 12 and 24h. Six of seven parameters of a generalised beta function fitted to conidia germination of M. fructicola and M. laxa were similar. Only the shape parameter was higher for M. fructicola indicating that the range of temperatures and wetness periods favourable for germination is wider for M. laxa than for M. fructicola. The optimum temperature for brown rot development caused by M. fructicola was 24.5 degrees C and for. Monilinia laxa was 19.8 degrees C. At 10 degrees C M. laxa lesions produced more conidia than M. fructicola, and the opposite occurred at 30 degrees C. The estimated maximum temperature for lesion development was also higher for M. fructicola than for M. laxa. M. fructicola is favored by warmer weather than M. laxa and the presence and impact of this specie in Brazil must be investigated especially in the South states. (AU)

• Processo FAPESP: 07/52147-4 - Epidemiologia comparativa de podridao parda do pessegueiro causada por monilinia fructicola e m. laxa: o monociclo.
• Beneficiário: Sthela de Siqueira Angeli
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 03/10025-9 - Epidemiologia, quantificação de danos e manejo de doenças quiescentes e de pragas de fruteiras tropicais e subtropicais
• Beneficiário: Lilian Amorim
• Modalidade de apoio: Auxílio à Pesquisa - Programa PRONEX - Temático