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Larvicidal and insect growth regulator effect of α‐amyrin acetate from Catharanthus Roseus Linn against the malaria vector Anopheles Stephensi Liston (Diptera: Culicidae)
Author(s) -
KUPPUSAMY Chenniappan,
MURUGAN Kadarkarai,
ARUL Narayanasamy,
YASODHA Perumal
Publication year - 2009
Publication title -
entomological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 20
eISSN - 1748-5967
pISSN - 1738-2297
DOI - 10.1111/j.1748-5967.2009.00196.x
Subject(s) - anopheles stephensi , biology , insect growth regulator , instar , fecundity , juvenile hormone , catharanthus roseus , vector (molecular biology) , botany , toxicology , malaria , larva , anopheles , pupa , aedes aegypti , biochemistry , immunology , recombinant dna , population , demography , sociology , gene
Vector control is a serious concern in developing countries. Over the past two decades, phytochemicals have received progressively more attention as insecticide alternatives, and they have recently become the focus in the concept of integrated vector control. α‐Amyrin acetate, the n‐hexane fraction of acetone extract from the leaves of Catharanthus roseus , was evaluated for its larvicidal, pupicidal and fecundity effects as well as insect growth regulator activity against the malaria vector Anopheles stephensi Liston. The highest concentration of 1 p.p.m. produced 100% mortality in first to second instars and 94% mortality in third and fourth instars. In addition, the duration of larval instars and the total developmental time were prolonged, while female longevity and fecundity were markedly decreased. The suppression of pupation and adult emergence was probably due to its action similar to juvenile hormone analogs in combination with growth regulator activity and toxicity, which reduced the overall performance of the malaria vector An. stephensi .