The lethal and sub-lethal effect of essential oils of Lavandula angustifolia L. and Origanum vulgare Mill. on life table parameters of Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae)

Document Type : Original paper

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Abstract

The potato tuber moth, Phthorimaea operculella Zeller is one of the most important pests of potato in temperate regions such as Iran. Since the damage of this pest dominantly occur in stores and the potato is one of the major sources of human food, safe methods in control of this pest is important.population responses to chemical compounds is very critical in insect management programs, therefore in this investigation sub-lethal concentrations (LC25) of essential oils of Lavandula angustifolia L. and Origanum vulgare Mill (0.30 and 0.25 µl/l, respectively) were examined in terms of life-table parameters of P. operculella under laboratory condition at 26±1oC, 60±5% RH and a photoperiod of 16L: 8D. The values of rm were estimated to be 0.107±0.016, 0.101±0.017 and 0.104±0.008 in control, Lavander and Oregano treatments, respectively. In this parameter, there was no significant difference between control and Oregano treatment, but difference between control and Lavander treatment was significant. Life expectancy values of the pest in birth were estimated to be 27.38, 16.81 and 20.42 day in control, Lavander and Oregano treatments, respectively.

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Agricultural Pest Management
Volume 1, Issue 2 - Serial Number 2
December 2015
Pages 41-51

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