| 摘要 |
<p>Plants are protected from the damaging effects of Phycomycetous fungi by a series of pyridazines having halo-branched-alkyl or halo-branched-alkyl-silyl groups. The pyridazines have the formula <CHEM> wherein R<3> is chloro, bromo, methyl, cyano or iodo; R is chloro, bromo, iodo, methyl, cyano or furan-2-ylmethoxy; R<1> is hydrogen, methyl, ethyl or n-propyl; R<2> is <CHEM> X is fluoro, chloro, bromo or iodo; X<1> and X<2> independently represent X or hydrogen, provided that no more than one of X<1> and X<2> is hydrogen; R<4> is hydrogen, chloro, bromo, methyl or ethyl; R<5> is hydrogen, chloro, methyl, ethyl, chloromethyl or dichloromethyl; or R<4> and R<5> combine with the group to which they are attached to form a C3-C7 cycloalkyl group substituted with a R<1> group; R<6> is hydrogen, chloro, bromo, methyl or ethyl; R<7> is hydrogen, methyl, ethyl, chloromethyl or dichloromethyl; one or m and n is 0 or 1, and the other is 0; p is 0-4. s</p> |
