| Comparative use of bendiocarb and DDT to control Anopheles pseudopunctipennis in a malarious area of Mexico. | |
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MedLine Citation:
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PMID: 1768914 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The state of Sinaloa has one of the highest and most persistent malaria transmission levels in Mexico. Due to this situation, with resistance of the vector Anopheles pseudopunctipennis Theobald to DDT, the carbamate insecticide bendiocarb was evaluated as an alternative to DDT for residual house-spraying in village-scale trials during 1985-87. Application rates of the active ingredient per square metre of sprayable surface (ai/m2) were 0.4 g bendiocarb 80% wettable powder (80WP) and 2 g DDT 75% WP. Both insecticides failed to control mosquito populations. Human-bait mosquito densities were not altered as a result of insecticide spraying and human-bait collected mosquito mortality rates were low, suggesting little pre-biting insecticide contact due to avoidance or insufficient resting time indoors. Lower densities of indoor-resting mosquitoes were observed with DDT as opposed to bendiocarb treated houses. Anopheline mortality was higher (98-100%) when exposed for 1 h to 1% bendiocarb in standard WHO susceptibility tests and wall bioassays. Mortality-rates of 15-48% due to 1 h exposure to 4% DDT indicated that this insecticide may continue to be partially effective. House curtain and mark-recapture mosquito studies indicated that DDT produced higher excito-repellency than bendiocarb, as reflected by more mosquito landings but lower feeding rates, shorter resting period and earlier exit time from DDT sprayed houses. In the absence of insecticide, more than 50% of blood-fed An.pseudopunctipennis females exited from houses within 2-4 h of release, showing exophilic behaviour. The outdoor/indoor density ratio indicated that the majority were exophagic. These behavioural characteristics limit the usefulness of any residual insecticide against An.pseudopunctipennis. |
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Authors:
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E G Loyola; M A Vaca; D N Bown; E Pérez; M H Rodriguez |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Medical and veterinary entomology Volume: 5 ISSN: 0269-283X ISO Abbreviation: Med. Vet. Entomol. Publication Date: 1991 Apr |
Date Detail:
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Created Date: 1992-02-26 Completed Date: 1992-02-26 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8708682 Medline TA: Med Vet Entomol Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 233-42 Citation Subset: IM |
Affiliation:
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Centro de Investigación de Paludismo, Dirección General de Epidemiología, Estado de Sinaloz, Mexico. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aerosols Animals Anopheles* Carbamates* DDT* Feeding Behavior Female Housing Humans Insect Vectors* Insecticide Resistance Insecticides* Malaria / prevention & control Mexico Mosquito Control Parity Phenylcarbamates* |
| Chemical | |
Reg. No./Substance:
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0/Aerosols; 0/Carbamates; 0/Insecticides; 0/Phenylcarbamates; 22781-23-3/bendiocarb; 50-29-3/DDT |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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