| abstract |
Summary of the Invention n n Organic phosphoric acid ester derivatives of the formulan n whereinn R represents alkyl, R 1 represents alkyl, R 2 represents alkyl, alkenyl or alkynyl, R 3 represents alkyl or aryl, X represents an oxygen atom or a sulfur atom and Y represents an oxygen atom, a sulfur atom or 〉N―R 4 , nin which R 4 represents alkyl, provided that in the case in which Y represents 〉N―R 4 , nthen R 3 represents alkyl, nand their use as insecticides and nematicides. |