Formulação filmogênica à base de quitosana e seu potencial no controle de pragas em goiabeira

Abstract

Brazil is the third largest fruit producer in the world. Fruit growing has been one of the main alternatives for productive diversification for many agricultural properties, with a focus on the growing demand for waste-free food as a counterpoint to the fact that Brazil is one of the countries that most use pesticides in the world. The use of bioactive and natural substances, such as chitosan, for pest management has shown to be promising, and its action may also be enhanced with the incorporation of organic and / or inorganic compounds to its polymeric structure. As a result, the objective of this doctoral research was to synthesize, characterize and evaluate filmogenic solutions and films based on chitosan with the incorporation of organic and inorganic compounds, as an innovation in the area of phytoprotectors for pest control in guava trees. The formulations were characterized by spectroscopy in the infrared region, scanning electron microscopy, dispersive energy spectroscopy, differential scanning calorimetry and thermogravimetric analysis, in addition to the evaluation of their antifungal activity in vitro and in vivo, as well as their pest repellent activity. guava in the temperate region. The results showed that it was possible to obtain scientific innovation against pests in guava trees, by adjusting the concentrations in the formulations. Part of the results presented in this thesis originated the filing of the patent application with the National Institute of Industrial Property (INPI), in co ownership between Embrapa Clima Temperado and Universidade Federal de Pelotas (UFPel). Another part of the results of this thesis remains confidential in view of the completion of the patent that will be held soon.