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Title: Effect of temperature on growth of penicillium digitatum and geotrichum candidum on agar and on citrus fruit and chemical control of post-harvest rot caused by the two fungi
Authors: Kassim, M.Y.
Khan, Shamsher
Keywords: Temperature
Penicillium digitatum
Geotrichum candidum
Citrus fruit
Chemical control
Post-harvest Rot
P. digitatum
G. candidum
Issue Date: 1996
Publisher: King Saud University
Citation: Journal of King Saud University, Science: 8 (1); 33-38
Abstract: Penicillum digitatum and Geotrichum candidum were isolated from infected citrus fruits collected from cold storages of Riyadh, Saudi Arabia. Growth rates of the fungus at 5, 10,20,25,30 and 35°C were compared on agar and on fruit. The rate increased with increased temperature, reaching optima at 20 and 25°C, respectively, on agar and on fruits for P. digitatum and 30°C for G. candidum on both agar and fruit. The growth rate of both fungi dropped sharply at 35°C on agar but less on fruit. To control the fruit rot of citrus caused by P. digitatum and G. candidum, bavistin, benomyl, guazatine and imazalil were used at the rate of 500 mglliter. Fruits were inoculated with the respective fungi and after 20 hours of incubation dipped for one minute in the fungicidal solutions separately. The infected fruits were incubated in polythene bags at room temperature for two weeks. All the tested fungicides reduced the fruit infection caused either by P. digitatum or by G. candidum. Gauzatine was more effective than the other fungicides and it totally inhibited the rot caused by either of the two fungi.
URI: http://hdl.handle.net/123456789/957
Appears in Collections:Journal of the King Saud University - Science

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