COMPOSITION WEED KILLER AND PROCEDURE OF ELIMINATION OF THE BAD GRASS.

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The present invention relates to a herbicidal composition containing as active ingredients at least one organophosphorus compound and 3-substituted phenylpyrazole derivative of the general formula (I) : [wherein R is -YR, -YCH(R)CO-OR, -COOCH(R)CO-YR or -COOR (R, R, R, R, Y and Y are specified groups), R is a lower alkyl group, R is a hydrogen atom, a lower alkyl group or a lower haloalkyl group, X and X, which may be the same or different, are halogen atoms, Y is -O-, -S-, -SO- or -SO2-, and n is zero or 1]; and a weeding method using said composition.