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Explorations of the substances potential that can act as promoters of growth-inducing activities are in substantial contribution of research to agriculture. Many of these activities are related to the activation capacity of the plants resistance mechanisms, thus enabling seek control through integrated management. With the modernization of agriculture, marked advances in farming techniques have been obtained, allowing mitigate the limiting factors with weather conditions such diseases, pests, among others. The plant physiology has promoted great advances in recent years with the advent of modern techniques such as the production of plants by tissue culture, genetic engineering and biotechnology. Among these modern techniques, the use of bioactive, capable of increasing the productive potential of plants, is an increasing use in the practice of modern agriculture and widespread in countries highly technical. In Brazil, the use of bioactive beginning to be explored and the results of several studies have shown that these substances provide significant increases in productivity and, in quality, as observed, for example, significant increases in the amount of larger fruits. Bioactivators are natural substances of plant origin that have actions similar to the main plant growth regulators, aimed at growth and development of the plant. Provide better physiological balance, favoring closer ties to the genetic potential of culture. Moreover, they are complex organic substances, not bioregulators, growth modifiers, capable of working in the plant transcription factors and gene expression in membrane proteins by altering the ion transport. They also act in metabolic enzymes could affect the secondary metabolism and may alter the mineral nutrition, induce the production of precursors of plant hormones, leading to hormone synthesis and more intense response to nutrients and plant hormones. Applied to plants, bioactivators cause modification or alteration of specific metabolic and physiological processes, such as increasing the division and cell elongation, stimulation of chlorophyll synthesis and photosynthesis, flower bud differentiation, increasing the life of plants, softening the effects of adverse weather conditions and increasing the absorption of nutrients and setting their roots.

Insecticide Thiamethoxam: A Bioactive Action on Carrot Seeds (Daucus carota L.)