Document Detail


The use of a semiochemical bait to enhance exposure of Amblyomma variegatum (Acari: Ixodidae) to Metarhizium anisopliae (Ascomycota: Hypocreales).
MedLine Citation:
PMID:  19091474     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Experiments were conducted to explore the use of a semiochemical bait to enhance exposure of Amblyomma variegatum Fabricius (Acari: Ixodidae) to different formulations of the entomopathogenic fungus Metarhizium anisopliae (Metsch.) Sorok. (Ascomycota: Hypocreales). Initially, the relative efficacies of attraction-aggregation-attachment pheromone (AAAP), made up of o-nitrophenol, methyl salicylate and nonanoic acid in the ratio 2:1:8, 1-octen-3-ol and butyric acid, were evaluated in an olfactometer. Only AAAP and 1-octen-3-ol were found to elicit attractive responses to the tick. Simultaneous release of 1-octen-3-ol and AAAP together with CO(2) from a trap in semifield plots attracted up to 94.0+/-6% of adult ticks from a distance of 6m, and up to 24.0+/-5.1% from 8m. Formulations of M. anisopliae (dry powder, oil, and emulsifiable) applied within the trap baited with AAAP, 1-octen-3-ol and CO(2) resulted in high levels of contamination of the ticks attracted to the traps. However, 48h after autoinoculation, 89.1 and 33.3% of conidia were lost in dry powder and oil formulations, respectively. Emulsifiable formulation showed least loss of propagules (17.1%). Samples of ticks attracted to the baited traps were transferred to plastic basins containing grass and maintained for 5 weeks. The experiment was conducted in rainy and dry seasons. Emulsifiable formulation gave the highest relative tick reduction in both seasons: 54.7 and 46.5% in rainy and dry seasons, respectively, followed by oil formulation (32.0 and 23.8%) and powder formulation (38.0 and 24.4%).
Authors:
F Nchu; N K Maniania; A Touré; A Hassanali; J N Eloff
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-11-13
Journal Detail:
Title:  Veterinary parasitology     Volume:  160     ISSN:  0304-4017     ISO Abbreviation:  Vet. Parasitol.     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-03-03     Completed Date:  2009-05-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7602745     Medline TA:  Vet Parasitol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  279-84     Citation Subset:  IM    
Affiliation:
International Centre of Insect Physiology and Ecology, African Insect Sciences for Food and Health, Nairobi, Kenya.
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MeSH Terms
Descriptor/Qualifier:
Animals
Antibiosis
Emulsions
Female
Hypocreales / growth & development*
Ixodidae / growth & development*,  microbiology*
Male
Pest Control, Biological / methods*
Pheromones / pharmacology*
Seasons
Tick Control / methods*
Tick Infestations / prevention & control,  veterinary
Chemical
Reg. No./Substance:
0/Emulsions; 0/Pheromones

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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