Bioefficacy of the triterpenoid friedelin against Helicoverpa armigera (Hub.) and Spodoptera litura (Fab.) (Lepidoptera: Noctuidae). Issue 12 (26th February 2014)

• Record Type: Journal Article
• Authors: Baskar, Kathirvelu; Duraipandiyan, Veeramuthu; Ignacimuthu, Savarimuthu
• Is Part Of: Pest management science. Volume 70:Issue 12(2014:Dec.)
• Page Start: 1877
• Page End: 1883
• Publication Date: 2014-02-26
• Subjects: Pests -- Control -- Periodicals; Pesticides -- Periodicals; 632.9
• DOI: 10.1002/ps.3742
• Languages: English
• ISSNs: 1526-498X

Abstract

<abstract abstract-type="main" id="ps3742-abs-0001"> <title>Abstract</title> <sec id="ps3742-sec-0001" sec-type="section"> <title>BACKGROUND</title> <p id="ps3742-para-0001">The triterpenoid friedelin isolated from hexane extract of <italic>Azima tetracantha</italic> leaves was evaluated for its antifeedant, larvicidal and pupicidal activities against <italic>Helicoverpa armigera</italic> and <italic>Spodoptera litura</italic> at 125, 250, 500 and 1000 ppm concentration.</p> </sec> <sec id="ps3742-sec-0002" sec-type="section"> <title>RESULTS</title> <p id="ps3742-para-0002">Friedelin exhibited antifeedant (84.57 and 75.28%), larvicidal (72.88 and 66%) and pupicidal (76.18 and 66.66%) activities against <italic>H. armigera</italic> and <italic>S. litura</italic> respectively. The homogeneity of variances (Levene statistic) showed significant deviation for the antifeedant, larvicidal and pupicidal activities of friedelin against <italic>H. armigera</italic> and <italic>S. litura</italic>. It exhibited LC<sub>50</sub> values of 130.47 and 226.41 ppm for antifeedant and 509.56 and 607.99 ppm for larvicidal activities against <italic>H. armigera</italic> and <italic>S. litura</italic> respectively. In linear regression analysis, significant and high correlation was noted between concentration and antifeedant activity with <italic>R</italic><sup>2</sup> = 0.84 and 0.79 and between concentration and larvicidal activity with <italic>R</italic><sup>2</sup> = 0.81 and 0.76 against <italic>H. armigera</italic> and <italic>S. litura</italic> respectively.</p> </sec> <sec id="ps3742-sec-0003" sec-type="section"> <title>CONCLUSION</title> <p id="ps3742-para-0003">Regression between antifeedant and larvicidal activities also showed significant activity (<italic>P</italic> = 0.00) with <italic>R</italic><sup>2</sup> = 0.79 for <italic>H. armigera</italic> and <italic>R</italic><sup>2</sup> = 0.70 for <italic>S. litura</italic>. Friedelin showed good activity against both the pests. Friedelin did not show any toxicity against freshwater fish <italic>Cyprinus carpio</italic> at 100 mg L<sup>−1</sup>. Friedelin could be used to prepare a botanical formulation to control the agricultural pests. © 2014 Society of Chemical Industry</p> </sec> </abstract>