A BIOINSECTICIDE FORMULATION CONSISTING OF BACILLUS THURINGIENSIS VAR ISRAELENSIS, AND ITS CONCERNING MANUFACTURE PROCEEDINGS

摘要

The principal aim of the present invention is to afford a bioinsecticide dry composition based on entomotoxines of Bacillus thuringiensis var israelensis, which is characterized by its practicability, economy and efficacy in controlling Dipteral insects, being, at the same time, ecologically safe. Thus, the principal objective of this invention is to get a bioinsecticide dry formulation, comprising : (a) entomotoxines, pure or not, of Bacillus thuringiensis var israelensis; (b) chemical dryers; (c) dispersing agents; (d) agglutinant/humectant agents; (e) protectors against sunlight; and (f) optionally, diluent, lubricant and neutralizing agents. A first embodiment of this invention is related to a bioinsecticide formulation dispensed as dry powder, or tablets, comprising additives carrying the entomotoxines, pure or not, selected in way to afford a high dispersion of the active component in the application area, but bringing about no risks to the environment. A second embodiment of this invention is related to the proceedings for obtention of bioinsecticide formulation, delineated by the following phases: I) Development of Bacillus thuringiensis var israelensis by means of fermentation in a suitable growth medium, where the not spent metabolites/nutrients are not harmful to the environment and they may be used in an industrial scale. II) The recovery of toxical biomass, or its spores, or only entomotoxines gotten in the phase (I) by means of a suitable process of recuperation, able to keep the toxical activity of entomotoxines (pure or not). III) Sequential addition of chemical dryers, and other addictives to the toxical biomass, or to the spores, or only to the entomotoxines recovered as mentioned in phase (II). Occasionally, the accomplishment of a dehydration phase between joining the chemical dryers and the other additives. IV) Dehydration of the blend gotten in phase (III), by means of process able to keep the toxical activity of entomotoxines pure or not, in order to obtain a formulation dispensed as dry powder. V) Optional addition of additives, as diluents, lubricants, and neutralizing agents to the dry powder gotten in the phase (IV), in order to obtain the tablets.