| 摘要 |
A pyran derivative represented by a general formula <IMAGE> wherein R1 is hydrogen, lower alkyl, cycloalkyl or phenyl, R2 is alkyl having 8 to 20 carbon atoms, R3 is hydrogen, halogen, <IMAGE> or -CH2N A, R4 and R5 being each lower alkyl or cycloalkyl, A being -CH213 , oxygen or nitrogen atom, N A forms five or six-member ring (the ring may have no substitutent or have at least one substituent selected from lower alkyl, lower alkoxy and halogen atom), or an acid salt thereof, are useful as agricultural miticides.
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