Effects of Chlorpyrifos, Imidacloprid and neem seed powder on emergence of adults of the invasive fruit fly Bactrocera invadens (Diptera:Tephritidae)

  • Abdelaziz Gesmallah The National Institute for Promotion of Horticultural Exports, University of Gezira, Wad Medani, Sudan.
  • Nabil Bashir Department of Pesticides and Toxicology, Faculty of Agricultural Sciences, University of Gezira, Wad Medani, Sudan
  • Mohamed Elkashif The National Institute for Promotion of Horticultural Exports, University of Gezira, Wad Medani, Sudan.
  • Yousif Assad 2Department of Pesticides and Toxicology, Faculty of Agricultural Sciences, University of Gezira, Wad Medani, Sudan

Abstract

   Bactrocera invadens (Drew, Tsuruta and White) (Diptera:Tephritidae) is an invasive fruit fly species of Asian origin which was detected in twenty African countries. Now, the species is well established in several parts of the Sudan. The effects of Chlorpyrifos, Imidacloprid and neem seed powder on emergence of B. invadens adults were determined under laboratory condition. Third instars larvae were exposed to treated and untreated (control) sand.  Chlorpyrfos were tested at 2, 4,8,12,16 and 32 ppm, Imidacloprid at 2, 4, 8,16 and 32 ppm and neem seed powder at 312.5  (0.031%), 625 (0.063%),1250 (0.125%), 2500 (0.25%) and 5000 ppm (0.5%). Twenty mature third instars larvae were placed in petri dish (15 cm in diameter) to allow them to pupate in the treated and untreated sand. They were supplied with small pieces of mango fruit pulp to feed on. The experiment was replicated three times. Number of emerged adults was recorded after ten days and the mortality rate (%) was calculated. Observations on the effect of the tested chemicals on the pupae formation were taken. Data were analyzed using probit analysis. The three tested chemicals were found to be effective in inhibiting the emergence of adults but with varying degrees. The inhibition always increased with increasing the concentration of the chemicals. Chlorpyrifos was the most effective among the tested chemicals, with an LC50 of 4.13 ppm compared to Imidacloprid and neem seed powder which had an LC50 of 10.14 ppm and 1299.63 ppm, respectively. Emergence of adults was completely inhibited at concentration of 32 ppm of Chlorpyrifos. Pupation was much affected by Chlorpyrifos and Imidacloprid compared to neem seed powder.


 


 


   Bactrocera invadens (Drew, Tsuruta and White) (Diptera:Tephritidae) هي إحدى أنواع ذبابة الفاكهة الغازية.  يعتبر موطنها الأصلي هو آسيا وقد تم رصده في عدد 20 دولة أفريقية وهي الآن موجودة في أجزاء مختلفة من السودان. تم إختبار أثر مبيدات الكلوروبيروفوس ، إميداكلوبريد وبدرة بذور النيم على خروج الحشرات الكاملة للنوع B. invadens حيث تم الإختبار على الطور اليرقي الأخير الذي سمح له بالتعذر داخل تربة معاملة بالمركبات المذكورة أعلاه. التركيزات التي تم إختبارها هي 2، 4 ، 8 ،12 ،16 و32 جزء من المليون، 2، 4، 8 ، 16 و32 جزء من المليون و 312.5 (0.031% )، 625 (0.063%) ، 1250 (0.125%) ، 2500 (0.25%)  و5000 (0.5%) جزء من المليون  للكلوروبيروفوس ، إميداكلوبريد وبدرة بذور النيم على التوالي. تم وضع 20 يرقة من الطور اليرقي الأخير في طبق بتري وسمح له بالتعذر في تربة معاملة بالمركبات أعلاه وأخرى غير معاملة (الشاهد). وضعت قطع صغيرة من المانجو على سطح التربة لكي تتغذى عليها اليرقات قبل التعذر. كررت التجربة ثلاثة مرات إضافة إلى الشاهد. بعد عشرة أيام تم تسجيل الحشرات الكاملة التي خرجت ومنها تم تحديد نسبة الموت (%). أيضاً تم ملاحظة أثر المركبات المختبرة على تكوين العذارى. تم تحليل النتائج بإستخدام تحليل البروبت. أوضحت نتائج الدراسة أن المركبات المختبرة الثلاثة ذات كفاءة في تثبيط خروج الحشرات الكاملة بدرجات متباينة، وجد أن التثبيط بشكل عام يزيد بزيادة التركيز. كما وجد أن الكلوروبيرفوس هو الأكثر كفاءةً بـLC50   4,13 جزء من المليون مقارنة بالإميداكلوبريد وبدرة بذور النيم  LC50  10,14 و 1299,63 جزء من المليون على التوالي. خروج الحشرات الكاملة ثبط تماماً عند تركييز الكلوروبيرفوس بـ 32 جزء من المليون.


 


 


 


 


 


 

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Published
2011-01-01
How to Cite
GESMALLAH, Abdelaziz et al. Effects of Chlorpyrifos, Imidacloprid and neem seed powder on emergence of adults of the invasive fruit fly Bactrocera invadens (Diptera:Tephritidae). Gezira Journal of Agricultural Science, [S.l.], v. 9, n. 2, jan. 2011. ISSN 1728-9556. Available at: <http://journals.uofg.edu.sd/index.php/gjas/article/view/1054>. Date accessed: 25 mar. 2019.
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Articles