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Contact and fumigant toxicities of calamusenone isolated from Acorus gramineus rhizome against adults of Sitophilus zeamais and Rhizopertha dominica
Author(s) -
Huang YanZhang,
Hua HongXia,
Li ShiGuang,
Yang ChangJu
Publication year - 2011
Publication title -
insect science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 45
eISSN - 1744-7917
pISSN - 1672-9609
DOI - 10.1111/j.1744-7917.2010.01358.x
Subject(s) - sitophilus , fumigation , rhizome , biology , toxicology , maize weevil , curculionidae , pesticide , infestation , pest analysis , horticulture , botany , agronomy
Calamusenone [3,8‐dimethyl‐5‐(1‐methylethylidene)‐1,2,3,4,5,6,7,8‐octahydroazulene‐6‐one, C 15 H 22 O] from Acorus gramineus Soland rhizome was tested in the laboratory for its insecticidal activities against adults of Sitophilus zeamais Motsch. and Rhizopertha dominica (Fab.), using dry film contact and fumigation methods. Responses varied with insect species, dosage and exposure time. In the dry film contact experiment, the highest insecticidal effects of calamusenone against S. zeamais and R. dominica adults were produced at 170.32 μg/cm 2 after treatment for 72 h, with 96.2% and 98.7% mortalities, respectively. The median lethal concentration (LC 50 ) (72 h) values of calamusenone against S. zeamais and R. dominica adults were 67.00 μg/cm 2 and 77.30 μg/cm 2 , respectively. As a potential fumigant, calamusenone showed moderate insecticidal effect on the adults of S. zeamais and R. dominica in fumigation experiment, with their LC 50 (120 h) values of 125.71 μL/L and 93.64 μL/L respectively. Calamusenone isolated from A. gramineus rhizome showed promise as a novel pesticide candidate for stored‐product pest control.