| Summary: | In order to know the phytosociology of the weeds associated with a carrot crop (Daucus carota L.) under conditions of the municipalities of Ventaquemada and Jenesano-Boyacá, a lot was selected per municipality for carrot cultivation and a plot was made W-shaped covering an area of 500 m2. Relative density, relative frequency, relative dominance and the importance value index (IVI) were calculated, as well as the Alpha and Beta diversity indices for the sampled areas. A total of 6 families and 11 species were counted, of these 63.64% were represented by annual plants and 36.36% by perennial plants. The class Liliopsida (Monocotyledonous) was represented by the family Poaceae. While the Magnoliopsida (Dicotyledonous) class was represented by the families: Asteraceae, Brassicaceae, Boraginaceae, Leguminosaceae, Polygonaceae, the latter being the one that contributed the largest number of species. The species R. crispus and P. nepalense were those that presented the highest values of Importance value index (IVI) with 0.953 and 0.959, respectively. Accordingly, with the Shannon-Wiener diversity index and Simpson dominance, the evaluated areas presented a low species diversity and a high probability of dominant species. The results found can serve as a basis and tool for the carrot producers in the evaluated areas, to define the management plans of the associated weeds and thus optimize the yields in this crop.
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