Bioatividade do extrato de capim vetiver em pulgões da couve

This paper was performed with the objective of evaluating the efficiency of different dosagesof alcoholic extract of vetiver grass (Vetiveria zizanioides) on cabbage aphid (Brevicorynebrassicae) repellency. This aphid is an important pest in the cultivation of brassicas, amongthem the cabbage (Brassica oleracea, variety Acephala), being the great cause of productionlosses, difficult to handle and fast proliferation. Six treatments and one additional treatmentwere used in the experiment, with the dosages 1%, 2%, 3%, 4% and 5% (m/v), for the controlit was used ethyl alcohol 92.6% and the additional treatment was distilled water. There was a5% probability difference between the evaluated dosages of the alcoholic extract, and the estimateddosage (DE) where the highest level of repellency of the cabbage plants was reachedwas 2.59% (m/v).