Tecnologia de aplicação de Trichoderma Asperellum e interferência na fitossociologia de plantas daninhas na cultura da Manihot Esculenta Crantz.

Abstract

The cultivation of cassava is of great importance for populations, especially those in development, because it is a crop with high rusticity and productivity. However, competition with weeds can reduce productivity dramatically. Therefore, the objective of this work was to evaluate the influence of the technology of application of Trichoderma on weed phytosociology in the cassava crop. The species were collected, identified and calculated the phytosociological parameters. Twenty - four species distributed in 8 botanical families were identified by phytosociological survey. The most representative families were Poaceae, Cyperaceae and Fabaceae. It was verified the highest value index of importance IVI with the species Paspalum maritimum that was present in all the plots together with the Cleome aculeata. When comparing the mode of application with different volumes of syrup, it was observed a linear growth in weed density with the increase in the volume of the syrup when the application in the total area and in the application in the range was applied, there is a quadratic growth behavior of the density, already in the localized application had a slight reduction in the weed density with the increase in the volume of the syrup. The Trichoderma asperellum on weed dynamics in cassava crop.