| 摘要 |
N-carbamyloxy-6-oxotetrahydro-1,3-oxazines of the formula <IMAGE> wherein R is hydrogen, alkyl or aryl, R1 and R2 are alkyl or aryl, X is halo, R3 and R4 are hydrogen, alkyl or halo, with the proviso that two R1 and R2 groups may together form a divalent alkylene group of 3 to 5 carbon atoms, have been round to be excellent plant fungicides, particularly for plant diseases caused by Phytophthora infestans and the fungal species of the Peronosporaceae family.
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