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Evaluation of Infestation Degree of Root-Knot Nematode on two Tobacco Varieties (Burley and Flue-Cured) and Surveying of Meloidogne Species in the Syrian Coast

تقدير درجة الإصابة بمرض تعقد الجذور النيماتودي Root Knot Nematode على صنفي التبغ برلي و فيرجينيا و حصر و تحديد أنواع النيماتودا Meloidogyne في الساحل السوري

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 Publication date 2013
and research's language is العربية
 Created by Shamra Editor




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This study was conducted in Tobacco fields in the Syrian coast to investigate Root-knot Nematode on two varieties of tobacco (Burley and Flue-cured). Two hundred and five samples of the roots of infected plants were collected from 32 fields in the period between early August and early October. The results showed that the degree of infestation was high (fifth degree) to Flue-cured tobacco (average was 179.20 knot for one sample), and fourth degree to the Burley tobacco (average 39.95 knot on one sample). There were three species of Meloidogyne: M.javanica, it had the most frequency 46.25 % and 43.7 % of Burley and Flue-cured tobacco respectively, followed by M.incognita 26.25 % and 24.44% of samples respectively. These species were present together in less frequency on both studied varieties. Whereas the third specie M.arenaria only appeared in three sites of Flue-cured tobacco in less frequency (5.18 %) and was associated with M.incognita.


Artificial intelligence review:
Research summary
تبحث هذه الدراسة في تقدير درجة الإصابة بمرض تعقد الجذور النيماتودي على صنفي التبغ برلي وفيرجينيا في الساحل السوري، وتحديد أنواع النيماتودا المسببة للإصابة. تم جمع 205 عينات جذرية من 32 حقلاً في الفترة بين أوائل أغسطس وأوائل أكتوبر 2011. أظهرت النتائج أن درجة الإصابة كانت مرتفعة، حيث وصلت إلى الدرجة الخامسة في صنف فيرجينيا بمعدل 179.20 عقدة على العينة الواحدة، والدرجة الرابعة في صنف برلي بمعدل 39.70 عقدة على العينة الواحدة. تم تحديد ثلاثة أنواع من النيماتودا: M.javanica، M.incognita، وM.arenaria. كان النوع M.javanica الأكثر تكراراً بنسبة 46.25% و43.7% في صنفي برلي وفيرجينيا على التوالي، يليه النوع M.incognita بنسبة 26.25% و24.44%. ظهر النوع الثالث M.arenaria بشكل محدود في ثلاثة مواقع فقط بنسبة تكرار منخفضة بلغت 5.18% في صنف فيرجينيا ولم يظهر في صنف برلي. توصي الدراسة بضرورة دراسة حساسية صنف برلي تجاه الإصابة بالنوع M.arenaria في دراسات مستقبلية.
Critical review
تعتبر هذه الدراسة مهمة جداً لفهم تأثير نيماتودا تعقد الجذور على محصول التبغ في الساحل السوري. ومع ذلك، هناك بعض النقاط التي يمكن تحسينها. أولاً، كان من الأفضل توسيع نطاق الدراسة لتشمل مناطق أخرى من سوريا للحصول على صورة أكثر شمولية. ثانياً، لم تتناول الدراسة بشكل كافٍ تأثير العوامل البيئية الأخرى مثل التربة والمناخ على انتشار النيماتودا. ثالثاً، كان من الممكن تقديم توصيات أكثر تفصيلاً حول كيفية مكافحة هذه النيماتودا بطرق بيولوجية أو كيميائية. وأخيراً، كان من المفيد تضمين دراسة اقتصادية لتقدير الخسائر المالية الناتجة عن الإصابة بمرض تعقد الجذور.
Questions related to the research
  1. ما هي أنواع النيماتودا التي تم تحديدها في الدراسة؟

    تم تحديد ثلاثة أنواع من النيماتودا وهي: M.javanica، M.incognita، وM.arenaria.

  2. ما هي درجة الإصابة بمرض تعقد الجذور في صنفي التبغ برلي وفيرجينيا؟

    وصلت درجة الإصابة إلى الدرجة الخامسة في صنف فيرجينيا بمعدل 179.20 عقدة على العينة الواحدة، والدرجة الرابعة في صنف برلي بمعدل 39.70 عقدة على العينة الواحدة.

  3. ما هو النوع الأكثر تكراراً من النيماتودا في الدراسة؟

    النوع الأكثر تكراراً هو M.javanica بنسبة 46.25% في صنف برلي و43.7% في صنف فيرجينيا.

  4. ما هي التوصيات التي قدمتها الدراسة؟

    أوصت الدراسة بضرورة دراسة حساسية صنف برلي تجاه الإصابة بالنوع M.arenaria في دراسات مستقبلية.


References used
CHITWOOD,B.G. Root-knot nematode- part I. A Revision of the genus Meloidogyne Goeldi,Helminthological society ,.Vol .16. No 2,1949. P 90-15
Commenwealth Institute of Helminthology(C.I.H.).Description of plant parasitic nematodes.CAB International,1972
EISENBACK,J.D.;HIRSCHMANN,H.SASSER,J.N.;TRIANTAPHYLLOU,A.C A Guide to the Four Most Common Species of Root-Knot Nematodes (Meloidogyne Spp.), With A Pictorial Key.International Meloidogyne Project USA,1981.P 1-48
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