Abstract: The present invention relates to the control of pest infestation by inhibiting or reducing the expression of genes of the family of chitin synthase and of vitellogenin, as well as through the expression of the toxin Cry8ka5. The invention further provides method and compositions for controlling pests, by feeding the pest with one or more double-stranded RNA molecules provided by the present invention, as well as double-stranded RNA molecule provided by the present invention, as well as through the action of the toxin Cry8ka5 on the target insect. The invention further describes a method of obtaining transgenic plants that express double-stranded RNA molecules and the toxin protein Cry8ka5. The present invention is preferably used for cotton plants.

Abstract: The present invention relates to a polynucleotide sequence capable of efficiently modifying the expression of one or more genes of interest in leaves, in particular in plants of the Glycine genus, and the tools to obtain genetically-modified plants using this sequence and the use thereof. The usage possibilities of the invention are broad, prominently, the creation of new plant varieties resistant to diseases and leaf-attacking pests, expression of transgenes that increase the photosynthetic efficiency of the plant, guiding the expression of proteins of interest as antibodies and drugs that may easily be isolated from leaves.