É possível controlar em áreas urbanas a espécie invasora ricinus communis l.?

Abstract

Biological invasions are a worldwide problem that affects from large continents to isolated islands. Countries such as South Africa, Australia, Brazil, the US, and New Zealand spend millions of dollars annually on attempts to minimize the problems caused, to control, or to eradicate populations of these species and to recover or restore invaded environments. Agriculture and forestry are primarily responsible for the intentional introduction of new species for a variety of purposes. Less than 1% of these species over the years become invasive (Richardson and Rejmánek, 2011), yet biological invasions have been increasing and threatening native biodiversity, as well as compromising the provision of various ecosystem services. The objective of the present study was to evaluate the effects of different control methods, mechanical, physical and chemical, on the control of invasive species of urban areas Ricinus Communis L., in order to provide subsidies for the management initiatives of this species. The individuals of spontaneous occurrence in the arborization areas of the Campus do Pici were characterized as to height, diameter, number of bifurcations and crown projection. Individuals with a diameter greater than 0.50 cm will be measured at the ground level (DNS), measures that will be taken with the aid of a pachymeter. The total height (Ht) of each individual, from the soil to the apex of the crown, with the aid of a telescopic ruler. Already the projection of the canopy with the help of the tape measure. The experiment was conducted in a completely randomized design (DIC), in a double factorial scheme (six control methods and two monitoring periods) and 10 replications per control method, totaling 60 individuals evaluated. The data analysis was descriptive. It was concluded that the population of Ricinus communis is in full development and in the dispersal phase and that the use of 5% herbicides together with the mechanical control, as well as the use of fire, are efficient in the control of Ricinus communis urban areas.