Abstract
In this study, the insecticidal activity of native diatomaceous earth (DE) Turco004 was tested against pupae of the Potato tuber moth, [Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae)] in laboratory conditions. In the bioassays were used dust formulation and applied four concentrations (2.5, 5, 10 and 20g/m2) of DE. Pupa weights and the number of adults emerging from the pupae were recorded after 24, 48, 72, 96, 120, 144 and 168 hours of diatomaceous earth exposure. It was concluded that the weights of the pupae are significantly affected depending on exposure time. In addition, pupal eclosion was prevented, and no adult emergency was observed at all concentration applied. The data obtained revealed that the native diatom soil Turco004 may have a potential in the control of P. operculella at all applied doses.
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