Evaluación del extracto orgánico de ajenjo (Artemisia absinthium L.) en tres concentraciones para controlar el pulgón (Brevicoryne brassicae) en el cultivo de brócoli (Brassica oleracea L. var. Itálica)

Abstract

The study was carried out at the experimental campus of the Faculty of Agricultural Sciences, in Querochaca, belonging to the Technical University of Ambato and located within the following geographical coordinates: 1º 22 ′ 02 ″ of South latitude and 78º 36 ′ 22 ″ of West longitude, with an altitude of 2850 meters above sea level. The plant material was subjected to the following conditions: average temperature of 12.7 ºC, annual precipitation of 632 mm, relative humidity of 76.1% and wind with a speed of 3.3 mm/sec. The research aimed to determine the appropriate concentration of wormwood extract to reduce aphid population (Brevicoryne brassicae) in broccoli (Brassica oleracea var. Italica) crop. The factor under study was the wormwood extract used in 3 different concentrations (15%, 30% and 45%), additionally a commercial control was used. The analysis of variance was carried out in the experimental design of completely randomized blocks with 4 repetitions. The best result obtained by the Tukey tests with a significance level of 5% was the concentration of 45% (D3); the extract did not interfere with the normal development of the plant, but highly significant levels were observed for the variables incidence (82.5%) and severity (39.25%). The benefit/cost ratio showed us that the D3 treatment with the concentration at 45% obtained the best result; being this 0.26 times more than what was invested