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Post-harvest diseases of apples
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89 b
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The storage of apples exposes them to various diseases, which may be physiological in origin, often linked to cold temperatures, or parasitic in origin, mainly fungal diseases. Twelve fungal species were isolated from stored apples from various cold storage rooms in Kenitra (Morocco). Apple and bean-based media and Czapek, MEA, and PSA media are favorable for the development of these fungi, unlike Petri media. The optimal pH for mycelial growth and sporulation of all species studied is between 5 and 7. In addition, we studied the nutritional requirements of fungal species isolated from apples at different carbon and nitrogen sources. The reduction in apple rot by azoxystrobin was significant at 4°C and moderate at 25°C for the pathogens tested, with the exception of Aspergillus niger and A. fumigatus. Benzimidazoles are ineffective in vitro and in vivo on the development of all fungi except Aspergillus niger and Aspergillus fumigatus, while anilinopyrimidine is more effective on all fungi studied.
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