Na região fruti-ortícula do cinturião verde da cidade de Córdoba, Argentina, ocorre com frequência nos períodos de inverno e primavera o aparecimento de Polygomun aviculare. O objetivo do presente trabalho foi o de conhecer a fenologia desta espécie e as necessidades bioclimáticas de cada uma das etapas do seu ciclo de vida. Para estas análises conduziu-se um ensaio em uma propriedade do cinturião verde, na região Nordeste de Córdoba, durante os anos de 1988, 1989 e 1990. Determinrou-se as fases e subperíodos do ciclo evolutivo da espécie e parâmetros como altura e densidade de plantas e dados meteorológicos. O estudo permitiu estabelecer o fluxo estacional de emergência e determinar o tipo ecológico de planta daninha quanto à estação de crescimento. Os aspectos ecológicos levantados servirão de ferramentas para implementar estratégias de controle desta planta daninha.Palavras chave: Planta daninha, emergência, fenologia. ABSTRACT Bioclimatic characteristic of weeds in the city Cordoba's green belt. Part I -Polygonum aviculare"Knotweed", Polygonum aviculare is one of the most common weeds in the winter-spring period in the horticultural zone of Córdoba green belt. In order to know the phenology and climatic requirements of the species in each stage of its life cycle, an experiment was conducted in one of the green belt farms located in the NE of Córdoba outskirsts for three years (1988, 1989, 1990). Different phases and sub-periods of this life cycle, phenometric parameters (plant height and density) and meteorological observations were determined. The experiment enabled to establish the stational flow of emergency and corroborate the winterspring ecological type of the weed. These aspects of the bioecology, phenology and bioclimatology are necessary tools when implementing an integrated system of weed control.
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