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Volume 2025, Issue 1
  • EISSN: 2708-0463

Abstract

تُعتبر المساحات الخضراء داخل الجامعات من العناصر الأساسية التي تسهم في تحسين البيئة العمرانية، حيث تلعب دوراً هامّاً في تعزيز الاستقرار البيئي والاجتماعي والصحي، ومع ذلك تواجه هذه المساحات تحديات متعددة، من بينها الإصابات الحشرية والفطرية التي تؤثر على صحة الأشجار وتنوعها البيولوجي، نظراً إلى أهمية الحفاظ على هذه المساحات. هدفت هذه الدراسة إلى حصر وتقييم الأنواع الشجرية داخل محيط مجمع كليات الفتائح بجامعة درنة – ليبيا، مع التركيز على تحديد الأنواع الأكثر انتشاراً، وتقييم حالتها الصحية، وتحليل الإصابات التي تتعرض لها، مما يسهم في وضع استراتيجيات للحفاظ على الغطاء النباتي داخل المؤسسات التعليمية. تم تنفيذ الدراسة خلال الفترة من ديسمبر 2023 إلى يوليو 2024، حيث تم إجراء مسح ميداني لحصر الأنواع الشجرية، وتقييم نسبة انتشارها، وقياس معدلات الإصابة بالأمراض والآفات، كما تم تحليل الأعراض المرضية المصاحبة للإصابات الفطرية والحشرية؛ لتحديد أبرز المشكلات الصحية التي تعاني منها الأشجار في الموقع المدروس. وأظهرت النتائج أن أشجار الأوكالبتوس كانت الأكثر انتشاراً بنسبة 44.21%، بينما سجلت أشجار الخروب أقل نسبة 1.05%، كما بَيَّنت الدراسة أن أشجار الكازورينا تعرضت لأعلى معدل إصابة بلغ 69.10%، في حين كانت أشجار الزيتون الأقل تأثراً بنسبة 40.71%، أما شدة الإصابة، فقد كانت الأعلى على أشجار الكازورينا بمعدل 37.35%، والأقل على أشجار الزيتون بنسبة 21.16%، كما تم تحديد تَبَقُّع الأوراق السركسبوري الناتج عن الفطرCercospora sp، كأكثر الأمراض الفطرية انتشاراً، حيث ظهر على أشجار الخروب والفيكس والزيتون، بينما تم تسجيل ظاهرة الموت الرجعي على أشجار الكازورينا والسرو الإيطالي. وتؤكد هذه الدراسة على أهمية حماية وصيانة المساحات الخضراء داخل الجامعات، وضرورة اتخاذ تدابير وقائية لمكافحة الإصابات الحشرية والفطرية، مما يسهم في تعزيز استدامة النظم البيئية الحضرية.

Green spaces within universities are considered essential elements that contribute to improving the urban environment, as they play an important role in enhancing environmental, social and health stability. However, these spaces face multiple challenges, including insect and fungal infections that affect the health and biodiversity of trees. Given the importance of preserving these spaces, this study aimed to identify and evaluate tree species within the vicinity of the Al-Fatiah Campus at the University of Derna, Libya, with a focus on identifying the most widespread species, assessing their health status, and analyzing the infections they are exposed to, which contributes to developing strategies to preserve the vegetation cover within educational institutions. The study was conducted from December 2023 to July 2024, during which a field survey was carried out to identify tree species, assess their prevalence, and assess the rates of infection from diseases and pests. Symptoms of diseases associated with fungal and insect infections were also analyzed to determine the most significant health problems suffered by trees in the study site. The results showed that eucalyptus trees were the most widespread at a rate of 44.21%, while carob trees recorded the lowest prevalence rate at 1.05%. Additionally, the study showed that Casuarina trees experienced the highest infection rate (69.10%), while olive trees were the least affected (40.71%). The severity of infection was highest in casuarina trees (37.35%), and lowest in olive trees (21.16%). Cercospora leaf spot, caused by the fungus Cercospora sp, was identified as the most common fungal disease, appearing on carob, and olive trees, while dieback was observed on casuarina and Italian cypress trees. This study underscores the importance of protecting and maintaining green spaces within universities, and the need for preventive measures to address insect and fungal infections, which contributes to the sustainability of urban ecosystems.

© 2025 The Author(s), licensee HBKU Press.
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2025-04-30
2025-05-20
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حصر وتقييم حالات الإصابات المرضية للأنواع الشجرية والشجيرية الإبرية وعريضة الأوراق داخل محيط مجمع كليات الفتائح جامعة درنة-ليبيا
​​​​Arabian Journal of Scientific Research-المجلة العربية للبحث العلمي 2025, 4 (2025); https://doi.org/10.5339/ajsr.2025.4
/content/journals/10.5339/ajsr.2025.4
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  • Article Type: Research Article
Keyword(s): green spaces, tree species, insect infestations, fungal infections, urban environment and المساحات الخضراء، الأنواع الشجرية، الإصابات الحشرية، الإصابات والفطرية، البيئة الحضرية.

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