Bioactivity of Marrubium vulgare and Achillea millefolium leaf extracts on potato tuber moth Phthorimaea operculella Zeller

摘要

 The potato tuber moth Phthorimaea operculella Zeller (Lep., Gelechiidae) is one of the most important pests of potato worldwide. Plants are a rich source of novel natural substances that can be used to produce safe materials in IPM. In this study, ovicidal, oviposition deterring and fumigant activity of hexane, ethyl acetate, methanol and aqueous extracts of Achillea millefolium and Marrubium vulgare on different developmental stages of PTM have been investigated. The results indicate that maximum ovicidal activity was observed in hexane extract in both plants with LC50 values of 6.55 and 8.03 mg/l. All tested concentrations of M. vulgare and A. millefolium crude extracts caused great reductions in the number of eggs deposited. Among the tested extracts, except hexane extract of M. vulgare and ethyl acetat extract of A. millefolium remains induced the greatest antioviposition deterring effect, with no eggs oviposited. The fumigant toxicity of the M. vulgare and A. millefolium crude extract against 1st larval instar and adults of PTM was different. Among tested extracts only Hexane extract of M. vulgare had fumigant activity on adults of PTM