Efecto del aceite esencial de shanshi (Coriaria Thymifolia), tiglán (Clinopodium Tomentosum) y sinverguenza (Euphorbia Helioscopia L), sobre el gusano blanco de la papa (Premnotrypes Vorax Hustache).

Abstract

The present work was carried out with the objective of evaluating the effect of the essential oil of shanshi (Coriaria thymifolia), tiglán (Clinopodium tomentosum) and sinverguenza (Euphorbia helioscopia L), on the white worm of the potato (Premnotrypes vorax Hustache). The experiment was carried out in the Botanical Laboratory of the Faculty of Agricultural Sciences of the Technical University of Ambato. In the test the steam extraction method was used; once the essential oils were obtained 0.5% solutions were made; 1% and 2%, a completely randomized design with a subdivided plot design was used in the experiment, where the main plot will be represented by the plant species, the sub plot by the time of immersion of the tubers in the oil essential and sub-sub plot by the concentration of essential oil. In the evaluation of the insecticidal effect with the essential oil of shanshi, tiglán and scoundrel only significant differences in the hours to mortality between treatments were observed. At 24 hours, the tiglán treatments with 2% doses and the chemical control showed the best results (100%) of mortality, while the treatment shanshi to 0.5% showed the worst result (0%). At 48 hours, shanshi treatments at 2%, tiglán at 0.5 and tiglán at 1% presented the best results (100%) of mortality, while shanshi treatments at 1% and shameless at 0.5 % showed the worst result (33.33%). At 72 hours, 2% shamelessness presented the best result (100%) while the lowest value was shown in the scoundrel treatment at 0.5% (33,33). Finally, for the mortality times, the best value was observed in the chemical control (12.33 hours), while the lowest value was observed in the scoundrel (0.5%), (56 hours).