Abstract

RAMIREZ, Julián Ernesto; GOMEZ, María Isabel; COTES, José Miguel  and  NUSTEZ, Carlos Eduardo. Insecticidal effect of labiate essential oils on Tecia solanivora Povolny in laboratory. Agron. colomb. [online]. 2010, vol.28, n.2, pp.255-263. ISSN 0120-9965.

Potato, the most important agricultural product in the Colombian Andean economy, has in the guatemalan potato moth (Tecia solanivora Povolny) its principal pest, the management of which is based on intensive use of pesticides. A potential alternative to these chemical agents is the application of plant products. Under controlled conditions, the current research study tested the effect of essential oils from O. basilicum, O. majorana, M. piperita, O. vulgare, P. cablin, R. officinalis, S. officinalis and T. vulgaris, on eggs, larvae and adults of T. solanivora, as applied directly on the soil and to the tubers. The treatments had no significant effect on larval development or adult longevity. Under both application modes, the Patchouli and thyme oils at a 0.25% dose determined significant egg viability reductions. Under increased soil moisture and oil volume application the O. basilicum, O. majorana, M. piperita and R. officinalis treatments had a significant ovicidal action too. These results reveal the potential of these essential oils for the control of T. solanivora.

Keywords : potato; Solanum tuberosum; aromatics plants; ovicide; pesticide alternative.

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