Occurrence, characterization and management of fruit rot of immature cucumbers under greenhouse conditions in Oman

A study was undertaken to characterize and manage pathogens associated with fruit rot of immature cucumber fruits in greenhouses in Oman. A survey over five growing seasons from 2008 to 2010 in 99 different greenhouses in Oman showed that the disease was prevalent in 91 (92%) greenhouses and resulte...

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Bibliographic Details
Published in:Phytopathologia mediterranea 2011-12, Vol.50 (3), p.421-429
Main Authors: AL-SADI, Abdullah Mohammed, AL-SAID, Fahad AlJulanda, AL-KAABI, Saif Mohammed, AL-QURAINI, Suad Mohammed, AL-MAZROUI, Safa Said, AL-MAHMOOLI, Issa Hashil, DEADMAN, Mike Leonard
Format: Article
Language:English
Subjects:
Alternaria alternata
Aspergillus
Bipolaris
Botrytis
Botrytis cinerea
Carbendazim
Cladosporium
Corynespora cassiicola
Cucumbers
Cucumis sativus
Curvularia
Disease control
Foliar applications
Fruit rot
Fruits
Fungal infections
Fungi
Fungicides
Fusarium
Fusarium equiseti
Greenhouses
Pathogens
Phytopathology
Plant diseases
RESEARCH PAPERS
Soil
Temperature effects
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Summary:A study was undertaken to characterize and manage pathogens associated with fruit rot of immature cucumber fruits in greenhouses in Oman. A survey over five growing seasons from 2008 to 2010 in 99 different greenhouses in Oman showed that the disease was prevalent in 91 (92%) greenhouses and resulted in losses of 10 to 60% (avg. 33%) of immature fruits per plant. Incidence of the disease was not found to be affected by growing seasons, which could be attributed to the limited fluctuations in ambient temperatures in greenhouses. Isolations from diseased cucumber fruits yielded Alternaria alternata (isolation frequency = 52%), Fusarium equiseti (40%), Cladosporium tenuissimum (27%), Botrytis cinerea (6%), F. solani (6%), Corynespora cassiicola (3%), Aspergillus spp. (2%), Curvularia sp. (1%) and Bipolaris sp. (1%). With the exception of the Curvularia and Bipolaris species, all other fungi were pathogenic on cucumber fruits, with F. equiseti being the most aggressive, followed by Co. cassiicola, B. cinerea and A. alternata. Cladosporium and Aspergillus spp. were found to be weakly pathogenic. Comparing the efficacy of foliar and soil applications of carbendazim fungicide on fruit rot of cucumber showed that foliar applications significantly reduced fruit rot and increased cucumber yield when compared to soil application or to untreated experimental controls (P
ISSN:0031-9465
1593-2095