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摘要

New organic (thio) phosphoric acid ester compounds of the formula (I) wherein R1 is alkyl of from 1 to 6 carbon atoms, cyclohexyl or phenyl, R2 is alkyl of from 1 to 6 carbon atoms, R3 is alkylene of up to 6 carbon atoms, X is oxygen or sulfur, and Y is oxygen or sulfur HAVE BEEN FOUND TO EXHIBIT EXCELLENT HERBICIDAL, PARTICULARLY SELECTIVE HERBICIDAL ACTIVITY.