COMPOSIÇÃO HERBICIDA COMPREENDENDO MICROPARTÍCULAS POLIMÉRICAS CONTENDO UM HERBICIDA

IPC Classification

Priority claims

Abstract

ABSTRACT Herbicidal Composition comprising Polymeric Microparticles containing a Herbicide The invention provides a herbicidal composition comprising a mixture of: (a) polymeric microparticles containing a first herbicide, wherein the first herbicide is a synthetic auxin herbicide (e.g. dicamba, MCPA or 2,4-D) or an acetolactate synthase (ALS) inhibitor herbicide (e.g. triasulfuron, tribenuron-methyl, iodosulfuron-methyl, mesosulfuron-methyl, sulfosulfuron, flupyrsulfuron methyl, or pyroxsulam); wherein the first herbicide, when in a salt-free form and when not contained within polymeric microparticles, antagonises the herbicidal activity of pinoxaden; and (b) pinoxaden; wherein the polymeric microparticles are controlled-release matrices, within which is the first herbicide, and which function in such a way as to control and/or slow down the release of the first herbicide from the polymeric microparticles into a liquid (e.g. aqueous) medium when the polymeric microparticles are placed (e.g. dispersed) in and in contact with the liquid medium. The containing of the first herbicide within the controlled-release polymeric microparticles is thought to mitigate the antagonism of the grass-weed-herbicidal activity of pinoxaden which might otherwise be caused by the first herbicide depending on the circumstances. The invention also provides a method of reducing the antagonistic effect on the control of monocotyledonous weeds in non-oat cereals which is shown by a herbicidal mixture of either a synthetic auxin herbicide with pinoxaden or an ALS inhibitor herbicide with pinoxaden, which comprises applying a herbicidal composition according to the invention. The invention also provides a herbicidal compositon comprising (a) polymeric microparticles (e.g. controlled-release matrices), containing a first herbicide as defined above, and either (x) a nonionic surfactant or (y) a surface-modified clay, as defined herein.*******************************************tradução do resumoRESUMOPatente de Invenção: "COMPOSIÇÃO HERBICIDA COMPREENDENDO MICROPARTÍCULAS POLIMÉRICAS CONTENDO UM HERBICIDA". A invenção proporciona uma composição herbicida compreendendo uma mistura de: (a) micropartículas poliméricas contendo um primeiro herbicida, em que o primeiro herbicida é um herbicida de auxina sintética (p.ex. dicamba, MCPA ou 2,4-D) ou um herbicida inibidor da acetolactato sintase (ALS) (p.ex. triasulfuron, tribenuron-metila, iodosulfuron-metila, mesosulfuron-metila, sulfosulfuron, flupirsulfuron-metila, ou piroxsulam); em que o primeiro herbicida, quando em uma forma isenta de sal e quando não contido dentro de micropartículas poliméricas, antagoniza a atividade herbicida do pinoxaden; e (b) pinoxaden. A invenção também proporciona um método de redução do efeito antagônico no controle de plantas daninhas monocotiledôneas em cereais não aveia bem como uma composição herbicida compreendendo (a) micropartículas poliméricas (p.ex. matrizes de liberação controlada), contendo um primeiro herbicida como definido acima e/ ou (x) um tensioativo não iônico ou (y) uma argila de superfície modificada. 20634321v1