Document Details

Document Type : Article In Journal 
Document Title :
Comparitve susceptibility of Aedes aegypti larvae against different mixtures of bacterial toxins of Bacillus thuringiesis israelensis and Bacillus sphaericus
مقارنة حساسية يرقات بعوضة الأيدس إجيبتاي ضد مخاليط مختلفة من
 
Subject : Comparitve susceptibility of Aedes aegypti larvae against different mixtures of bacterial toxins of Bacillus thuringiesis israelensis and Bacillus sphaericus 
Document Language : English 
Abstract : The present study deals with the evaluation of efficiency of bacterial mosquito larvicides against Aedes aegypti when used in combinations with each other under laboratory conditions. Synergistic interactions among the multiple endotoxins of Bacillus thuringiesis Subsp. israelensis de Barjac ( Bti ) play an important role with high toxicity to mosquito larvae also the absence of insecticide resistance in populations treated with this bacterium. A lake of toxin complexity and synergism are the appartent causes of resistance to ( Bti ) in particular Aedes field populations. To identify endotoxins of the bacterium that might improve insecticidal activity and manage mosquito resistance, we tested their toxins alone and in combination. Most combinations of Bacillus sphaericus and Bti toxins were synergistic and enhanced toxicity relative to B. sphaericus, particularly against Ae. aegypti, when Cyr1Aa toxin from Bti was added to Ctty11A toxins of B. sphaericus, synergism value as high as 966-fold was observed and combinations were 5-86,000 fold more active than B. sphaericus. These data and previous studies using Cytolytic toxins, intiate proposed strategies for improving bacterial larvicides by combining B. sphaericus with Bti. These combinations increase both endotoxin complexity and synergistic interactions to enhance activity and help avoid insecticide resistance. 
ISSN : 1003-1545 
Journal Name : Journal of American Science 
Volume : 8 
Issue Number : 4 
Publishing Year : 1433 AH
2012 AD 
Article Type : Article 
Added Date : Thursday, May 24, 2012 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
نجاة علي حاطرKhatter, Najat AliInvestigatorDoctoratenajat.khatter4@gmail.com

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 33344.pdf pdf 

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