Fungicidal pyridazines

Abstract

Plants are protected from the damaging effects of Phycomycetous fungi by a series of pyridazines of formula ##STR1## wherein R.sup.3 is chloro, bromo, methyl, cyano or iodo; R is chloro, bromo, iodo, methyl, cyano or furan-2-ylmethoxy; R.sup.1 is hydrogen, methyl, ethyl or n-propyl; R.sup.2 is ##STR2## X is fluoro, chloro, bromo or iodo; X.sup.1 and X.sup.2 independently represent X or hydrogen, provided that no more than one of X.sup.1 and X.sup.2 is hydrogen; R.sup.4 is hydrogen, chloro, bromo, methyl or ethyl; R.sup.5 is hydrogen, chloro, methyl, ethyl, chloromethyl or dichloromethyl; or R.sup.4 and R.sup.5 combine with the group to which they are attached to form a C.sub.3 -C.sub.7 cycloalkyl group substituted with a R.sup.1 group; R.sup.6 is hydrogen, chloro, bromo, methyl or ethyl; R.sup.7 is hydrogen, methyl, ethyl, chloromethyl or dichloromethyl; one of m and n is 0 or 1, and the other is 0; p is 0-4.

Dependencies are inferred from the claim text.