Do you want to publish a course? Click here

Isolation of local Bacillus spp. Strains and Testing its Efficiency Against Wax Worm Galleria mellonella L. Larvae in Laboratory

عزل سلالات محلية من بكتيريا .Bacillus spp و اختبار فاعليتها ضد يرقات فراشة الشمع الكبيرة .Galleria mellonella L مخبرياً

1077   1   10   0.0 ( 0 )
 Publication date 2018
  fields Plant Protecion
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

This study was carried out to determine the efficiency of local Bacillus isolates to control large wax moth larvae (Galleria mellonella L.) at GCSAR laboratory in 2012. Infected larvae were collected from stored wax combs, and the bacteria Bacillus genus were isolated from dead larvae, or that showing disease symptoms of black brown spots on larvae cuticle. Bacterium was grown on T3 medium and identified according to biochemical tests, and the efficacy of isolates was determined on pure colonies of larvae. The results of biochemical tests showed that the isolates belong to Bacillus thuringiensis. Isolates were different in pathogenicity. Bt5 isolate was the most efficient to kill the larvae of large wax moth (72.4 %), and significantly superior all other isolates (p ≤ 0.01). Bt1 isolate showed a significant difference with control but non-significant difference with Bt2, Bt3, Bt4, Bt6 and Bt7 isolates.


Artificial intelligence review:
Research summary
أجريت هذه الدراسة لتقييم فاعلية سبع عزلات محلية من بكتيريا Bacillus لمكافحة يرقات فراشة الشمع الكبيرة Galleria mellonella L. في مختبرات الهيئة العامة للبحوث العلمية الزراعية في دمشق، سوريا. تم جمع اليرقات المصابة من أقراص الشمع المخزنة، وعزلت البكتيريا من اليرقات الميتة أو التي ظهرت عليها أعراض مرضية. بعد تنمية البكتيريا على وسط T3، تم تحديد نوعها باستخدام اختبارات بيوكيميائية، والتي أظهرت أن العزلات تنتمي إلى Bacillus thuringiensis. أظهرت النتائج أن العزلة Bt5 كانت الأكثر كفاءة في قتل يرقات فراشة الشمع بنسبة 72.41%، متفوقة على جميع العزلات الأخرى. بينما أظهرت العزلة Bt1 فاعلية بنسبة 27.59%، وكانت هناك فروق معنوية بين بعض العزلات والشاهد. تشير النتائج إلى أن العزلات المحلية من B. thuringiensis يمكن أن تكون بديلاً فعالاً للمبيدات الكيميائية في مكافحة الآفات الحشرية، خاصة في الظروف البيئية المحلية.
Critical review
دراسة نقدية: تعتبر هذه الدراسة خطوة مهمة نحو استخدام المكافحة البيولوجية كبديل للمبيدات الكيميائية الضارة. ومع ذلك، هناك بعض النقاط التي يمكن تحسينها. أولاً، الدراسة تركزت فقط على يرقات فراشة الشمع الكبيرة، وكان من الممكن توسيع نطاق البحث ليشمل آفات حشرية أخرى. ثانياً، لم يتم اختبار العزلات في ظروف حقولية أو شبه حقولية، مما يجعل من الصعب تقييم فاعليتها في الظروف الطبيعية. ثالثاً، لم يتم التطرق إلى إمكانية إنتاج هذه العزلات بكميات تجارية وكيفية دمجها في برامج المكافحة المتكاملة. أخيراً، كان من الممكن تقديم تحليل أعمق للآليات البيوكيميائية التي تجعل العزلة Bt5 الأكثر فعالية.
Questions related to the research
  1. ما هي العزلة الأكثر كفاءة في قتل يرقات فراشة الشمع الكبيرة؟

    العزلة Bt5 كانت الأكثر كفاءة بنسبة 72.41%.

  2. ما هي الاختبارات التي استخدمت لتحديد نوع البكتيريا؟

    استخدمت اختبارات بيوكيميائية لتحديد نوع البكتيريا.

  3. هل كانت هناك فروق معنوية بين العزلات المختلفة؟

    نعم، كانت هناك فروق معنوية بين بعض العزلات والشاهد.

  4. ما هي التوصيات المستقبلية لتحسين الدراسة؟

    التوصيات تشمل توسيع نطاق البحث ليشمل آفات حشرية أخرى، اختبار العزلات في ظروف حقولية، وتحليل أعمق للآليات البيوكيميائية.


References used
Abbott, W.S. (1925). A method of computing the effectiveness of an insecticide. J. Econ. Entomol., 18: 265-267
Ararso, Z.; and G. Legesse (2016). Insecticidal action of honeybees propolis extract against larvae of lesser wax moth. Agriculture and Biology Journal of North. America. 7(6): 302-306
Bagdanov, S.; V. Kilchenmann; K. Seiler; H. Pfefferli; T. Frey; B. Roux; P. Wenk; and J. Noser (2004). Residues of paradichorobenzene in honey and bees wax. Journal of Apicultural Research. 43: 14-16
rate research

Read More

The research has carried out at the Faculty of agriculture entomology lab. and agriculture research center at Duma . Samples have been collected from wax frames infected with Galleria mellonella (Lepidoptera: Pyralidae) From Damascus, Damascus rural areas, Qunytera, Daraa and Tartus Governorats, for three years (١٩٩٩ – ٢٠٠١).
Fifty eight isolates of lactic acid bacteria were obtained from different local fermented foods. Isolates were identified using microscopic, cultural and biochemical tests using API strips. Results showed that 44.83% of the isolates were rod shape d and 55.17% belonged to cocci bacteria.
Six different isolates of the fungus Beauveria bassiana were isolated from local soils, which collected from two different ecosystems (Natural and Cultivated), at the Syrian Coastal region, using the "Galleria Bait Method". The mortality caused by these fungal isolates against Galleria mellonella larvae was 100% after 3- 5 days post treatment. The pathogenicity of these isolates was studied against 3rd instar larvae of Spodoptera littoralis to detect the most virulent isolate. The mortality ranged from 75% to 100% for the all isolates at the 5th day post treatment. Spore suspension of the most virulent isolate was used at concentration 106spore/ml by spraying it on the pupae of S. littoralis. The percentage of adult emergence was 42% in the fungal treatment compared to the control treatment.
Some species of the Syrian Flora were waned, other were extincted. therefore, it was so nessesary to make a releve for restrict and classify the survival species in order to put them under conserving & improvement genetic program. The aim of this research was to study the plant diversity in West Homs; one of important basaltic region in Syria, and to concentrate on the wild legumes and the Rhizobium strains which cohabit with. A plant survey was carried out showed the existence of 365 species belong to 202 genera and 51 families, 15 species are endemic.12 species not observed previously in Syria but are found in Lebanon were recorded,in addition another 3 species not listed at all neither in Syria nor in Lebanon were mentioned. The geobotanical attributes and the economical importance of the gathered species were determined.as so as systematic keys of the most important families were suggested...The root nodules of 10 species belong to 10 genera of wild legumes were studied. Rhizobium strains were isolated and cultured in vitro. The morphologic characters were studied microscopy. The pure strains were reserved by refrigerator.
We aimed in this study to evaluate the effectiveness of Syrian propolis on some bacterial strains isolated from Al-Assad hospital in Latakia, to estimate its antimicrobial activity. Thus, we studied two propolis samples from two regions in the Syrian coast, and prepared ethanolic extracts of propolis (EEP) with different concentrations (0.5%, 1%, 5%, 10%, and 20%). Then we tested these extracts on four strains of bacteria (Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, and Acinetobacter baumannii), using pore method on Muller Hinton Agar. As we observed, the bacteria showed diverse susceptibility to the extracts and the most susceptible bacterium was Staphylococcus aureus which was sensitive to all concentrations and especially for EEP 20%. However, the least affected bacteria were E. coli and Pseudomonas, as the 0.5% and 1% EEP had no efficacy. On the other hand, there were little differences in antimicrobial activity between the two samples of propolis.
comments
Fetching comments Fetching comments
Sign in to be able to follow your search criteria
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا