Weed control: Physical, mechanical, cultural, biological and allelopathic methods
Weed control is an important practice in food production. The period between the years 1940 and 1970, called the Green Revolution, is characterized by advances in the use of rural mechanization, irrigation, fertilizers and pesticides, as well as the selection of more productive crops. The growth of herbicide supply in the country was rapid because the Brazilian government adopted a national program of agricultural pesticides with incentives for imports and then for the opening of factories. For this period, in the literature there are no descriptions of public policies or government incentive programs for non-chemical technologies that control weeds. More recently, in 2009, there was regulation of the differentiated registration of substances for use in organic production systems. This work describes the control of weeds by techniques tested and available for use (weed cutter, flaming, electrocution, solarization) and by techniques in development (products with herbicidal action, microorganisms for biological control of plants, substances with allelopathic effect) based on biological principles, mechanics, mulching and allelopathy.
Document author:Maurílio Fernandes de Oliveira, Alexandre Magno Brighenti