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Study The Effect of High Doses of Some Seed-dressing Fungicides on Delaying The Infection by Chickpea Ascochyta Blight

دراسة تأثير جرعات مرتفعة من مبيدات فطرية (كاسيات البذور) في تأخير الإصابة بلفحة أسكوكيتا الحمص

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 Publication date 2003
  fields Plant Protecion
and research's language is العربية
 Created by Shamra Editor




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This field study was carried out at EL- Gab Research Center during furing 2000-2001. Six fungicides namely, Benomyl 50%, Difenoconazole, Diniconazole, Fludioxonile, Triticonazole and Thiram 37.5% + Carboxin 37.5% with high doses×1, ×2, ×4, ×8 were used as seed dressings on chickpea cultivar Gab3 to study their effects on Ascochyta blight infection. The results showed that fungicides eradicated the infection from the seeds and protected the seedlings from infection. There was a clear effect on delaying the infection by ascochyta blight on chickpea for about 10-15 days in comparison with the untreated control. However, Higher doses of some fungicides negatively affected the yield.


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Research summary
تتناول هذه الدراسة تأثير استخدام جرعات مرتفعة من بعض المبيدات الفطرية ككاسيات بذور في تأخير الإصابة بمرض لفحة أسكوكيتا الحمّص. أجريت التجربة في مركز بحوث الغاب خلال موسم 2000-2001 باستخدام ستة مبيدات فطرية هي Benomyl، Difenoconazole، Diniconazole، Fludioxonil، Triticonazole، وThiram + Carboxin. تم استخدام هذه المبيدات بجرعات مختلفة (عادية، مضاعفة، أربعة أضعاف، وثمانية أضعاف) على صنف الحمّص غاب3. أظهرت النتائج أن المبيدات كانت فعالة في تثبيط المسبب المرضي المحمول على البذور ومنع انتقاله إلى البادرات، وتأخير الإصابة باللفحة لفترة 10-15 يوماً مقارنة بالشاهد غير المعامل. ومع ذلك، أثرت الجرعات العالية من بعض المبيدات سلباً على الغلة. توصي الدراسة باستخدام الجرعات العادية أو المضاعفة مرتين كحد أقصى لتحقيق حماية فعالة دون التأثير السلبي على الغلة.
Critical review
تُعد هذه الدراسة خطوة مهمة في مجال مكافحة مرض لفحة أسكوكيتا الحمّص، حيث تقدم حلولاً عملية لتأخير الإصابة بالمرض. ومع ذلك، يمكن توجيه بعض النقد البناء للدراسة. أولاً، لم تتناول الدراسة تأثير المبيدات على البيئة والتربة على المدى الطويل، وهو جانب مهم يجب مراعاته. ثانياً، كان من الممكن أن تكون الدراسة أكثر شمولية إذا تضمنت تجارب ميدانية في مناطق مختلفة لتقييم فعالية المبيدات في ظروف مناخية متنوعة. أخيراً، لم تتناول الدراسة التكلفة الاقتصادية لتطبيق الجرعات المختلفة من المبيدات، وهو جانب حيوي للمزارعين.
Questions related to the research
  1. ما هي المبيدات الفطرية المستخدمة في الدراسة؟

    المبيدات الفطرية المستخدمة هي Benomyl، Difenoconazole، Diniconazole، Fludioxonil، Triticonazole، وThiram + Carboxin.

  2. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي هو دراسة تأثير جرعات مرتفعة من بعض المبيدات الفطرية ككاسيات بذور في تأخير الإصابة بمرض لفحة أسكوكيتا الحمّص.

  3. ما هي النتائج الرئيسية التي توصلت إليها الدراسة؟

    النتائج الرئيسية هي أن المبيدات كانت فعالة في تثبيط المسبب المرضي المحمول على البذور ومنع انتقاله إلى البادرات، وتأخير الإصابة باللفحة لفترة 10-15 يوماً مقارنة بالشاهد غير المعامل، لكن الجرعات العالية أثرت سلباً على الغلة.

  4. هل توصي الدراسة باستخدام الجرعات العالية من المبيدات؟

    لا، توصي الدراسة باستخدام الجرعات العادية أو المضاعفة مرتين كحد أقصى لتحقيق حماية فعالة دون التأثير السلبي على الغلة.


References used
Akem, C. 1999. Ascochyta blight of chickpea: Present status and future priorities. International Journal of Pest Management. ISSN 0967-0874 print/ISSN 1366-5863.pp:131-135
Banniza, S., Chongo, G., Mcvicar, R., Morrall, R., Pearse, P. 2002. Managing Diseases in Lentil & Chickpea. Pulse Days 2002,Saskatoon. Pages 12-17 in Saskatchewan Pulse Growers
EL-Mott, M. S. 1981. Chickpea production in Syria. Pages 201-206 in: Ascochyta Blight and Winter Sowing of Chickpea (Saxena,M.C,and Singh, K.B,eds). Martinus Nijhoff/DR .W.Junk, ICARDA.Volume 9
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