Impact of slow-release Bacillus sphaericus granules on mosquito populations followed in a tropical urban environment
A floating, slow-release, granular formulation of Bacillus sphaericus (Neide) was used to control mosquito larvae in two suburban areas of two tropical cities: Ouagadougou and Bobo-Dioulasso, Burkina Faso. A circular area of 2 km2, diameter 1,600 m, was treated in each city using a similar, smaller area 1 km away as an untreated control. Mosquito captures were made in houses in four concentric circles, from the periphery to the center; each circle was 50 m in width. Mosquitoes were captured in CDC light traps or from human landings. More than 95% of the mosquitoes were Culex quinquefasciatus (Say) (Diptera: Culicidae). The human landing catches provided twice as many mosquitoes as did the CDC traps/night/house. The treatments resulted in important reductions relative to the control area and to preintervention captures. The reduction was more prominent in the inner circle (up to 90%) than in the outer circle (50-70%), presumably because of the impact of immigrating mosquitoes from nontreated breeding sites around the intervention area. This effect was more pronounced for light trap catches than from human landings. The impact of treatment was also measured as the mean ratio of mosquito density in the two outer circles to that of the two inner circles. This ratio was 1:1 before the intervention and reached 1:0.43 during the intervention. This comparison does not depend on the assumption that, in the absence of intervention, the mosquito population development in the two areas would have been identical, but does depend on the homogeneity of the intervention area. The study showed that it is possible to organize mosquito control in a tropical, urban environment by forming and rapidly training teams of young people to carry out the mosquito control mostly using a biopesticide that can be applied without any tools except an iron bar to lift lids on some cesspits.
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Subjects: | L72 - Organismes nuisibles des animaux, L73 - Maladies des animaux, Culex quinquefasciatus, Bacillus sphaericus, zone urbaine, http://aims.fao.org/aos/agrovoc/c_30517, http://aims.fao.org/aos/agrovoc/c_26387, http://aims.fao.org/aos/agrovoc/c_8085, http://aims.fao.org/aos/agrovoc/c_8081, |
Online Access: | http://agritrop.cirad.fr/572723/ http://agritrop.cirad.fr/572723/1/document_572723.pdf |
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dig-cirad-fr-5727232024-01-28T21:56:01Z http://agritrop.cirad.fr/572723/ http://agritrop.cirad.fr/572723/ Impact of slow-release Bacillus sphaericus granules on mosquito populations followed in a tropical urban environment. Skovmand Ole, Ouedraogo Thierry D.A., Sanogo Edith, Samuelsen Helle, Toé Léa Paré, Baldet Thierry. 2009. Journal of Medical Entomology, 46 (1) : 67-76.https://doi.org/10.1603/033.046.0109 <https://doi.org/10.1603/033.046.0109> Impact of slow-release Bacillus sphaericus granules on mosquito populations followed in a tropical urban environment Skovmand, Ole Ouedraogo, Thierry D.A. Sanogo, Edith Samuelsen, Helle Toé, Léa Paré Baldet, Thierry eng 2009 Journal of Medical Entomology L72 - Organismes nuisibles des animaux L73 - Maladies des animaux Culex quinquefasciatus Bacillus sphaericus zone urbaine http://aims.fao.org/aos/agrovoc/c_30517 http://aims.fao.org/aos/agrovoc/c_26387 http://aims.fao.org/aos/agrovoc/c_8085 Burkina Faso http://aims.fao.org/aos/agrovoc/c_8081 A floating, slow-release, granular formulation of Bacillus sphaericus (Neide) was used to control mosquito larvae in two suburban areas of two tropical cities: Ouagadougou and Bobo-Dioulasso, Burkina Faso. A circular area of 2 km2, diameter 1,600 m, was treated in each city using a similar, smaller area 1 km away as an untreated control. Mosquito captures were made in houses in four concentric circles, from the periphery to the center; each circle was 50 m in width. Mosquitoes were captured in CDC light traps or from human landings. More than 95% of the mosquitoes were Culex quinquefasciatus (Say) (Diptera: Culicidae). The human landing catches provided twice as many mosquitoes as did the CDC traps/night/house. The treatments resulted in important reductions relative to the control area and to preintervention captures. The reduction was more prominent in the inner circle (up to 90%) than in the outer circle (50-70%), presumably because of the impact of immigrating mosquitoes from nontreated breeding sites around the intervention area. This effect was more pronounced for light trap catches than from human landings. The impact of treatment was also measured as the mean ratio of mosquito density in the two outer circles to that of the two inner circles. This ratio was 1:1 before the intervention and reached 1:0.43 during the intervention. This comparison does not depend on the assumption that, in the absence of intervention, the mosquito population development in the two areas would have been identical, but does depend on the homogeneity of the intervention area. The study showed that it is possible to organize mosquito control in a tropical, urban environment by forming and rapidly training teams of young people to carry out the mosquito control mostly using a biopesticide that can be applied without any tools except an iron bar to lift lids on some cesspits. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/572723/1/document_572723.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1603/033.046.0109 10.1603/033.046.0109 info:eu-repo/semantics/altIdentifier/doi/10.1603/033.046.0109 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1603/033.046.0109 |
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L72 - Organismes nuisibles des animaux L73 - Maladies des animaux Culex quinquefasciatus Bacillus sphaericus zone urbaine http://aims.fao.org/aos/agrovoc/c_30517 http://aims.fao.org/aos/agrovoc/c_26387 http://aims.fao.org/aos/agrovoc/c_8085 http://aims.fao.org/aos/agrovoc/c_8081 L72 - Organismes nuisibles des animaux L73 - Maladies des animaux Culex quinquefasciatus Bacillus sphaericus zone urbaine http://aims.fao.org/aos/agrovoc/c_30517 http://aims.fao.org/aos/agrovoc/c_26387 http://aims.fao.org/aos/agrovoc/c_8085 http://aims.fao.org/aos/agrovoc/c_8081 |
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L72 - Organismes nuisibles des animaux L73 - Maladies des animaux Culex quinquefasciatus Bacillus sphaericus zone urbaine http://aims.fao.org/aos/agrovoc/c_30517 http://aims.fao.org/aos/agrovoc/c_26387 http://aims.fao.org/aos/agrovoc/c_8085 http://aims.fao.org/aos/agrovoc/c_8081 L72 - Organismes nuisibles des animaux L73 - Maladies des animaux Culex quinquefasciatus Bacillus sphaericus zone urbaine http://aims.fao.org/aos/agrovoc/c_30517 http://aims.fao.org/aos/agrovoc/c_26387 http://aims.fao.org/aos/agrovoc/c_8085 http://aims.fao.org/aos/agrovoc/c_8081 Skovmand, Ole Ouedraogo, Thierry D.A. Sanogo, Edith Samuelsen, Helle Toé, Léa Paré Baldet, Thierry Impact of slow-release Bacillus sphaericus granules on mosquito populations followed in a tropical urban environment |
description |
A floating, slow-release, granular formulation of Bacillus sphaericus (Neide) was used to control mosquito larvae in two suburban areas of two tropical cities: Ouagadougou and Bobo-Dioulasso, Burkina Faso. A circular area of 2 km2, diameter 1,600 m, was treated in each city using a similar, smaller area 1 km away as an untreated control. Mosquito captures were made in houses in four concentric circles, from the periphery to the center; each circle was 50 m in width. Mosquitoes were captured in CDC light traps or from human landings. More than 95% of the mosquitoes were Culex quinquefasciatus (Say) (Diptera: Culicidae). The human landing catches provided twice as many mosquitoes as did the CDC traps/night/house. The treatments resulted in important reductions relative to the control area and to preintervention captures. The reduction was more prominent in the inner circle (up to 90%) than in the outer circle (50-70%), presumably because of the impact of immigrating mosquitoes from nontreated breeding sites around the intervention area. This effect was more pronounced for light trap catches than from human landings. The impact of treatment was also measured as the mean ratio of mosquito density in the two outer circles to that of the two inner circles. This ratio was 1:1 before the intervention and reached 1:0.43 during the intervention. This comparison does not depend on the assumption that, in the absence of intervention, the mosquito population development in the two areas would have been identical, but does depend on the homogeneity of the intervention area. The study showed that it is possible to organize mosquito control in a tropical, urban environment by forming and rapidly training teams of young people to carry out the mosquito control mostly using a biopesticide that can be applied without any tools except an iron bar to lift lids on some cesspits. |
format |
article |
topic_facet |
L72 - Organismes nuisibles des animaux L73 - Maladies des animaux Culex quinquefasciatus Bacillus sphaericus zone urbaine http://aims.fao.org/aos/agrovoc/c_30517 http://aims.fao.org/aos/agrovoc/c_26387 http://aims.fao.org/aos/agrovoc/c_8085 http://aims.fao.org/aos/agrovoc/c_8081 |
author |
Skovmand, Ole Ouedraogo, Thierry D.A. Sanogo, Edith Samuelsen, Helle Toé, Léa Paré Baldet, Thierry |
author_facet |
Skovmand, Ole Ouedraogo, Thierry D.A. Sanogo, Edith Samuelsen, Helle Toé, Léa Paré Baldet, Thierry |
author_sort |
Skovmand, Ole |
title |
Impact of slow-release Bacillus sphaericus granules on mosquito populations followed in a tropical urban environment |
title_short |
Impact of slow-release Bacillus sphaericus granules on mosquito populations followed in a tropical urban environment |
title_full |
Impact of slow-release Bacillus sphaericus granules on mosquito populations followed in a tropical urban environment |
title_fullStr |
Impact of slow-release Bacillus sphaericus granules on mosquito populations followed in a tropical urban environment |
title_full_unstemmed |
Impact of slow-release Bacillus sphaericus granules on mosquito populations followed in a tropical urban environment |
title_sort |
impact of slow-release bacillus sphaericus granules on mosquito populations followed in a tropical urban environment |
url |
http://agritrop.cirad.fr/572723/ http://agritrop.cirad.fr/572723/1/document_572723.pdf |
work_keys_str_mv |
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