Uso de diferentes óleos essenciais no controle de Acanthoscelides obtectus em grãos armazenados

Abstract

The objective of this work was to carry out tests of biological activity (insecticide and repellent) with essential oils of Cymbopogon nardus and Ageratum conyzoides, to control Acanthoscelides obtectus in bean grains. The oil was obtained by hydrodistillation. The insecticidal test was performed in circular containers with 3 replicates for citronella oil and 6 replicates for mentrasto oil at doses 0, 5, 10, 20, 30, 50, 100 μL, 30 insects were released for citronella and 50 insects for the mentrasto in each repetition. The repellent activity was carried out in sands with bean grains impregnated with the essential oils at doses 0, 5, 10, 20, 30, 50, 100 μL. In the central sands 50 insects were released. It was verified that the essential oils extracted from citronella and mentrasto had an insecticidal effect on the beanworm. Regarding the repellency test, it was verified that the two essential oils tested have a repellent effect on A. obtectus. The essential oils were efficient in the control of caruncho, showing that its use can be seen as an alternative in the control of insects in stored grains.