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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Postharvest diseases in 'Pêra' orange cultivated in organic and conventional systems and resistance of Penicillium digitatum to fungicides

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Author(s):
Ivan Herman Fischer [1] ; Maria Cecília de Arruda Palharini [2] ; Marcel Bellato Spósito [3] ; Lilian Amorim [4]
Total Authors: 4
Affiliation:
[1] APTA Centro Oeste. Laboratório de Fitossanidade - Brasil
[2] APTA Centro Oeste. Laboratório de Fitossanidade - Brasil
[3] Universidade de São Paulo. ESALQ. Departamento de Produção Vegetal - Brasil
[4] Universidade de São Paulo. ESALQ. Departamento de Fitopatologia e Nematologia - Brasil
Total Affiliations: 4
Document type: Journal article
Source: Summa Phytopathologica; v. 39, n. 1, p. 28-34, 2013-03-00.
Abstract

Postharvest diseases may be responsible for significant losses to added of the fungicides thiabendazole (10 mg.L-1) and imazalil (1 citrus growers. This study aimed to: a) characterize the postharvest mg.L-1). Fruits treated with imazalil had lower incidence (5.4%) of diseases in 'Pêra' oranges from organic and conventional crops, with postharvest diseases, while fruits from organic crop had the highest or without postharvest treatment with imazalil, marketed in incidence (25.2%). The main postharvest diseases were green mold CEAGESP; and b) detect the presence of Penicillium digitatum isolates in fruits produced in the conventional system and Lasiodiplodia and resistant to fungicides in fruits with green mold. Fruits were kept in a Phomopsis stem-end rot in organic fruits. The relative frequency of humid chamber for 24 hours and for additional 13 days at 25 ºC and P. digitatum isolates resistant to the fungicide thiabendazole was 85% RH. The disease incidence was visually evaluated at every 2-3 lower in organic fruits, while the frequency of P. digitatum isolates days. The presence of P. digitatum resistant to the fungicides was resistant to imazalil and the mixture thiabendazole+imazalil was higher assessed based on mycelial growth on potato-dextrose-agar medium in fruits that received postharvest treatment with imazalil. (AU)

FAPESP's process: 07/08519-4 - Postharvest diseases in orange fruits and characterization of the fungal population in organic and conventional farmers
Grantee:Ivan Herman Fischer
Support Opportunities: Regular Research Grants