• English
    • français
  • English 
    • English
    • français
  • Login
View Item 
  •   Repository Home
  • Research Papers (RP)
  • RP-School of Pure and Applied Sciences
  • RP-Department of Chemistry
  • View Item
  •   Repository Home
  • Research Papers (RP)
  • RP-School of Pure and Applied Sciences
  • RP-Department of Chemistry
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Adulticidal activity and Toxicity of Extractives from Teclea Trichocarpa against Adult Maize Weevil (Sitophilus Zeamais)

Thumbnail
View/Open
Full article (58.96Kb)
Date
2012
Author
Chhabra, S. C.
Mwangi, E.S.K.
Keriko, J. M.
Machocho, Alex K.
Metadata
Show full item record
Abstract
With a growing world population and increased affluence leading to demand for more and higher quality foods, and given environmental problems such as soil degradation, water scarcity, and biodiversity loss, new and innovative solutions are required to minimize food losses caused by pests. Organic solvent extracts and thereof isolated compounds of Teclea trichocarpa Eng. were evaluated for adulticidal activity against maize weevil, Sitophilus zeamais Motchulsky, and for brine shrimp, Artemia salina, lethality. Hexane extract of the leaves of T. trichocarpa displayed mild brine shrimp toxicity (LD50=153.2 μg/ml), while the other extracts showed no significant toxicity (LD50>240 μg/ml). Both hexane and dichloromethane extracts of leaves of T. trichocarpa showed dose dependent meanpercentage adulticidal activity. At 600 and 800 ppm these extracts, respectively, were comparable to the positive control, actellic super, a synthetic pesticide which is in the market today. Considering the cost, increasing incidence of pesticide resistance and environmental concerns posed by synthetic pesticides,several pressures have accelerated the search for more environmentally and toxicologically safe, moreselective and efficacious pesticides. Results discussed with regard to the use of the plant extractives as suitable andsustainable alternative to synthetic insecticide in maize grain storage and could be incorporated in integrated pest management. Keywords:brine shrimp; Teclea trichocarpa; adulticidal activity; maize weevil, Sitophilus zeamais
URI
http://ir-library.ku.ac.ke/handle/123456789/8184
Collections
  • RP-Department of Chemistry [479]

Designed by Library ICT Team copyright © 2017 
Contact Us | Send Feedback

 

 

Browse

All of RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

LoginRegister

Designed by Library ICT Team copyright © 2017 
Contact Us | Send Feedback