Levantamento florístico de plantas daninhas em diferentes sistemas de cultivos agrícolas em Verê – Paraná

Abstract

In this course conclusion work, the objective was to understand the management of weeds in no-tillage, pasture and eucalyptus forestry systems, based on a floristic survey in the municipality of Verê - Paraná. Based on the collection of soil samples in these three activities and later taken to a controlled environment, in which the soil samples were deposited in trays in order to record the species of weeds that emerged. This process was carried out in three periods of the year, proving to be important for the knowledge of the species occurring in certain seasons and crops. Based on the counting and identification of the species, frequency, abundance were determined, in the notillage system the density plant was Conyza spp. having 2.2 plants / m² in August, followed by Bidens pilosa, with a density of 1.2 plants / m² registered in August, in the perennial pasture of B. brizantha the plant with the highest population density was Galinsoga partiflora, showing density of 1.2 plants / m² in March. In the eucalyptus area, the species with the highest density was Amaranthus deflexus during March, with a density of 2.4 plants / m². The harmful effects of species on cropping systems were also discussed, such as the occurrence of tolerance or resistance of these species and which control and management methods are appropriate for the control of each species.