Effects of thiamethoxam in sublethal concentrations, on life expectancy (ex) and some other biological characteristics of Hippodamia variegata (Goeze) (Coleoptera: Coccinellidae)
Journal Title: International Research Journal of Applied and Basic Sciences - Year 2013, Vol 4, Issue 3
Abstract
Hippodamia variegata Goeze (Coleoptera: Coccinellidae), is an important aphidophagous predator that is noticeable in IPM as a suitable biological control agent. In this study, influence of sublethal concentrations (LC10 and LC30) of a neonicotinoid insecticide, thiamethoxam, was evaluated on some of life parameters of this beneficial insect. Results showed that thiamethoxam changed life expectancy (ex), and declined age-specific fecundity (mx). The insecticide, decreased preadult development time significantly, but it didn't have any effect on adult developmental period. Also, Eggs fecundity and fertility didn't changed in treatments. According to this study, although thiamethoxam is approximately safe for the ladybird, more care should be taken when it is used in IPM programs.
Authors and Affiliations
Shima Rahmani| Plant Protection Department, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran., Ali R. Bandani*| Plant Protection Department, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.abandani@ut.ac.ir, Qodratollah Sabahi| Plant Protection Department, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
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