Tropical Plant Pathology (2008) 33, 219-226

Ivan H. Fischer, Silvia A. Lourenço and Lilian Amorim (2008)
Doenças pós-colheita em citros e caracterização da população fúngica ambiental no mercado atacadista de São Paulo
[Postharvest diseases in citrus and characterization of the fungal population in São Paulo's wholesale market]
Tropical Plant Pathology 33 (3), 219-226
Abstract: The purposes of this work were to characterize postharvest injuries and to evaluate the physicochemical characteristics of Pêra and Lima oranges and Murcott tangor at Ceagesp market, as well as to characterize the environmental mycoflora in retail points at Ceagesp in 2006. Fruits collected at retail points were stored for 14 days at 25ºC and 85-90% RH. The incidence of injuries was visually evaluated every three days. The physicochemical characteristics analyzed were titratable acidity and soluble solids amount. The environmental mycoflora was sampled according to the gravimetric method, using Petri dishes containing potato-dextrose-agar medium+pentabiotic opened for two minutes. The average rot incidences in Pêra and Lima oranges and Murcott tangor were 12.8, 14.9 and 25.8%, respectively, at the end of the storage period, and green mold was the main postharvest disease. Associations between physicochemical parameters and rot incidence was, in general, not significant. The environmental fungal population varied significantly between the sampling months in retail points with an average of 25.3 cfu/plate. Penicillium and Cladosporium were the most recorded genera of fungi. Positive correlation (r=0.96) was observed between frequency of P. digitatum found in the environment of retail points and the green mold in on-sale fruits of Pêra orange. However, for Lima orange and Murcott tangor such a correlation was not verified.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Database assignments for author(s): Lilian Amorim

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Penicillium digitatum	Citrus (genus)	Brazil (south)
	Penicillium digitatum	Stored fruits/vegetables	Brazil (south)
	Geotrichum candidum	Citrus (genus)	Brazil (south)
	Geotrichum candidum	Stored fruits/vegetables	Brazil (south)