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Natural Occurrence of Entomopathogenic Nematodes (EPNs) in Citrus Orchards in Lattakia Governorate, Syria

الوجود الطبيعي للنيماتودا الممرضة للحشرات (EPNs) في بساتين الحمضيات في محافظة اللاذقية - سورية

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 Publication date 2018
  fields Plant Protecion
and research's language is العربية
 Created by Shamra Editor




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This research was conducted in laboratory of Nematology in the Center of Scientific Agricultural Research in Lattakia, to detection of Entomopathogenic Nematodes (EPNs) in Citrus Orchards soils in Lattakia governorate. A total of 66 composite soil samples were collected from Citrus orchards during (2016- 2017). Entomopathogenic nematodes (EPNs) were recovered from soil samples by the insect baiting technique, using seventh instar larvae of the Greater wax moth Galleria mellonella (Lepidoptera: Pyralidae). Infective juveniles (IJs) were collected from G. mellonella cadavers using the method of White (1927). EPN isolates were identified based on morphometric methods. Eight isolates were identified as Heterorhabditis bacteriophora Poinar 1976 (Ord. Rhabditida: Fam. Heterorhabditidae) . Positive soil samples ratio was 12.12% of total samples, where EPNs isolates were extracted from regions (Al-Bassa, Al-Magreet, Al-Shamia, Gio, Al-Kharnoba, Al-Sorsokia, Fideo, Borj Al-Qasab)0 The soil textures of the EPNs positive samples were (sandy loam, silt loam, loamy sand, loamy clay sand, clay) with ( pH 6.34- :0.5) and (1.99- 4.82) g\100g organic content. The electrical conductivity of the nematode positive soils varied from 0.33 to 0.82 ds/m.


Artificial intelligence review:
Research summary
نُفِذَ البحث في مخبر النيماتودا في مركز البحوث العلمية الزراعية باللاذقية، وهدف إلى تقصي وجود النيماتودا الممرضة للحشرات (EPN) في ترب بساتين الحمضيات في محافظة اللاذقية. تم جمع 66 عينة ترابية مركبة من بساتين الحمضيات خلال العامين 2016-2017. استخدمت طريقة طعوم العمر اليرقي الأخير من دودة الشمع الكبرى Galleria mellonella للكشف عن وجود النيماتودا. تم تمييز الجنس Heterorhabditis من خلال تغير لون يرقات دودة الشمع المصابة إلى لون أحمر قرميدي، وبعض الصفات المورفولوجية. بينت النتائج أن 12.12% من العينات احتوت على النيماتودا الممرضة للحشرات، وتم الحصول على 8 عزلات محلية وجدت في مناطق مختلفة من اللاذقية. أظهرت النتائج أن النيماتودا توجد في ترب مختلفة القوام وذات درجات حموضة ومحتوى عضوي متفاوتين. تم تحديد النوع H. bacteriophora لجميع العزلات باستخدام القياسات البيومترية للطور اليرقي المعدي.
Critical review
دراسة نقدية: البحث يقدم معلومات قيمة حول وجود النيماتودا الممرضة للحشرات في بساتين الحمضيات في محافظة اللاذقية، ويعد إضافة مهمة للأبحاث الزراعية في المنطقة. ومع ذلك، يمكن تحسين الدراسة من خلال توسيع نطاق العينات لتشمل مناطق أخرى في سوريا، مما يعطي صورة أشمل لتوزيع النيماتودا. كما يمكن تعزيز البحث بإجراء تجارب ميدانية لتقييم فعالية هذه النيماتودا في مكافحة الآفات الحشرية بشكل عملي، مما يعزز من تطبيق النتائج في إدارة الآفات الزراعية. بالإضافة إلى ذلك، يمكن تحسين توثيق البيانات البيئية المحيطة بمواقع العينات لتحديد العوامل البيئية التي تؤثر على وجود النيماتودا بشكل أدق.
Questions related to the research
  1. ما هو الهدف الرئيسي من البحث؟

    الهدف الرئيسي من البحث هو تقصي وجود النيماتودا الممرضة للحشرات (EPN) في ترب بساتين الحمضيات في محافظة اللاذقية.

  2. ما هي الطريقة المستخدمة للكشف عن وجود النيماتودا في العينات الترابية؟

    استخدمت طريقة طعوم العمر اليرقي الأخير من دودة الشمع الكبرى Galleria mellonella للكشف عن وجود النيماتودا في العينات الترابية.

  3. ما هي النسبة المئوية للعينات التي احتوت على النيماتودا الممرضة للحشرات؟

    النسبة المئوية للعينات التي احتوت على النيماتودا الممرضة للحشرات هي 12.12%.

  4. ما هي أنواع الترب التي وجدت فيها النيماتودا الممرضة للحشرات؟

    وجدت النيماتودا الممرضة للحشرات في ترب لومية رملية، لومية سلتية، رملية لومية، رملية طينية لومية، وطينية.


References used
AKHURST, R. J. and BROOKS, W. M. The distribution of entomophilic nematodes (Heterorhabditidae and Steinernematidae) in North Carolina. Journal of Invertebrate Pathology 44, 1984, 140-145
ALMANOUFI, A.; JAMAL, M.; LILLO E. D.; TARASCO, E. and YASEEN, T. A Survey of the Native Entomopathogenic Nematodes and Fungi in the Soil of Southern Region of Syria. Jordan J. of Agricultural Sciences, Vol. 8, No.(3), 2012, 358-366
ALMEIDA, E. M.; BATISTA, A.; OLIVEIRA, F. C. and. RAGA, E. A. Pathogenicity of the Entomopathogenic Fungi and Nematode on Medfly Ceratitis capitata (Wied.) (Diptera: Tephritidae). BioAssay 2, 2007,1-7
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