Potencial inseticida e repelente de diferentes dosagens do óleo essencial de Baccharis dracunculifolia sobre Acanthoscelides obtectus em grãos armazenados de feijão

Abstract

This study aimed to evaluate the insecticide and repellent effect of essential oil of Baccharis dracunculifolia in control Acanthoscelides obtectus in stored beans. The material (Baccharis dracunculifolia) was collected, dried and performed the essential oil extraction by hydrodistillation method. To assess the insecticidal effect was tested doses of 0, 10, 20, 30, 50 and 100 uL of essential oil. The number of dead insects was counted after 24 and 48 h after inoculation. To verify the essential oil repellent effect were used plastic containers in arenas format. The time to count the insects per vial and doses tested were essential oil pesticide to the same test. The oil showed insecticidal effect at dosages of 50 and 100 uL of time in doses of 24 and 30, 50 and 100 uL for time 48h. In repellency test all oil doses proved repellents on insects.