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Planta Daninha

Print version ISSN 0100-8358


FERREIRA, E.A et al. Phyto-sociological evaluation of the weed community in areas in transition to organic coffee. Planta daninha [online]. 2011, vol.29, n.3, pp.565-576. ISSN 0100-8358.

The objective of this study was to evaluate the effects of conventional and organic inputs on weed dynamics during the first and second years of agro-ecological transition. Thus, an experiment was arranged in a six-year-old plantation, where transition to organic farming was initiated. The most important species in the first year of transition was Ageratum conyzoides, in most areas evaluated. In the second year, there was a considerable change in the dominance relationship between the species, especially regarding Leunurus sibiricus, which was the most important species in most areas studied during this period. There was also an increase in the number of species present in most areas in the second year. It was concluded that, during the two years of evaluation, changes were verified in the number, diversity, and importance relation between the species from one year to the other.

Keywords : weeds; interference; agro-ecology; importance value index.

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