The mosquito dunk (Bacillus thuringensis israelienses) as a control agent against mosquito larvae in Khartoum State, Sudan Abdalmagi
Sudan. j. public health
; 7(2): 51-55, 2012. tab
Article
in English
| AIM
| ID: biblio-1272458
Responsible library:
CG1.1
ABSTRACT
Background:
During the mid-1970s, larvicides have become available that are highly effective, yet selective in action, and therefore environmentally safe to non-target organisms, as well as for human exposure(1).Objectives:
The small field trial was carried out from 12th of January to 16th of February 2008 in Khartoum State to evaluate the efficacy and persistence mosquito dunk® (Bti) against mosquito larvae and to measure the effect of physic-chemical properties on mosquito dunk. Material &Methods:
The efficacy and persistence of Bacillus thuringiensis subspecies israelensis (mosquito dunk®) as a biological control agent against mosquito larvae was conducted in Khartoum State. Twelve ponds were used as natural breeding habitats of mosquitoes; six of them were treated with dunk at a rate of 1 dunk per 100 square feet and six ponds left untreated (control).Results:
The study revealed that more than 80% reduction in immature stages density was observed up to 5, 3 and 2 weeks for the 3rd, 2nd and 4th instars of Anopheline spp., respectively. However, the study showed that the mosquito dunk was noteffective (under 80% mortality) against 1st, instar larvae and pupae of Anopheline species as well as Culex developmental stages. Conclusion & Interpretations The dunk was very effective in controlling 3rd and 4th instars of Anopheles spp; for 2 weeks interval. Therefore we propose a surface application regime of once every 2 weeks for mosquito dunk
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Index:
AIM (Africa)
Main subject:
Sudan
/
Bacillus thuringiensis
/
Mosquito Control
/
National Health Programs
Country/Region as subject:
Africa
Language:
English
Journal:
Sudan. j. public health
Year:
2012
Type:
Article
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