Document Detail


Antifeedancy of neem products containing Azadirachtin against Culex tarsalis and Culex quinquefasciatus (Diptera: Culicidae).
MedLine Citation:
PMID:  9879068     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In order to develop and utilize new botanical insecticides originating from neem (Azadirachta indica A. Juss) in mosquito control programs as a potential larvicide, the antifeedant activity of three formulations of neem against the larvae of Culex tarsalis Coquillett and Culex quinquefasciatus Say was investigated under laboratory conditions. A significant antifeedancy was indicated at 5 ppm and 10 ppm azadirachtin (AZ) for all formulations and both species. Within the test concentration range of AZ (1-10 ppm), 5 ppm was the minimum effective concentration for antifeedancy in most cases. Some differences in larval susceptibility in terms of antifeedancy to the test formulations were noted between the two species. The Cx. tarsalis larvae were more susceptible than Cx. quinquefasciatus larvae to Azad EC 4.5 at 1 ppm during the first 15-min exposure period and at 5 and 10 ppm during the whole test period. The Cx. quinquefasciatus larvae were more susceptible than Cx. tarsalis larvae to Azatin WP 4.5 at 1, 5, and 10 ppm during the first 15-min exposure period or to Neemix EC 4.5 at 1 ppm during the first 45-min exposure period. The formulation-related differences in antifeedant activity appeared when the concentration increased from 1 to 10 ppm. In Cx. tarsalis, the Azad EC 4.5 and Neemix EC 4.5 were more effective than Azatin WP 4.5 at 5 ppm during the first 15-min exposure period and at 10 ppm during the whole test period. In Cx. quinquefasciatus, the Azatin WP 4.5 and Neemix EC 4.5 were more effective than Azad EC 4.5 at 1 ppm during the first 30-min exposure period, and at 5 ppm during the first 60-min exposure period, and at 10 ppm during the whole test period.
Authors:
T Su; M S Mulla
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of vector ecology : journal of the Society for Vector Ecology     Volume:  23     ISSN:  1081-1710     ISO Abbreviation:  J. Vector Ecol.     Publication Date:  1998 Dec 
Date Detail:
Created Date:  1999-03-17     Completed Date:  1999-03-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9512496     Medline TA:  J Vector Ecol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  114-22     Citation Subset:  IM    
Affiliation:
Department of Entomology, University of California, Riverside 92521-0314, USA.
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MeSH Terms
Descriptor/Qualifier:
Animals
Culex*
Dose-Response Relationship, Drug
Feeding Behavior*
Insect Vectors*
Insecticides / pharmacology
Larva
Limonins*
Time Factors
Triterpenes / pharmacology*
Chemical
Reg. No./Substance:
0/Insecticides; 0/Limonins; 0/Triterpenes; 11141-17-6/azadirachtin

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


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