Abstract: Fungicidal compositions comprise a combination of two fungicides, one of which is a quinoline or cinnoline compound of the formula (1) ##STR1## the substituents being as described in the specification.

Abstract: Compounds of the formula (1) ##STR1## the substituents are described in the specification. The compouns of formula (I) are plant fungicides.

Abstract: Compounds of the formula (I): ##STR1## wherein: X=O, S, or NOH;R.sup.1 is H or CH.sub.3 ;n=1, 2, or 3;R.sup.2, R.sup.3, and R.sup.4 are as defined in one of the following paragraphs(a) R.sup.2 and R.sup.3 are independently Cl or Br, and R.sup.4 is H;(b) R.sup.2, R.sup.3 and R.sup.4 are independently Cl or Br;(c) R.sup.2 is F, R.sup.3 is Cl, and R.sup.4 is H; or(d) R.sup.2 and R.sup.3 are CH.sub.3 or C.sub.2 H.sub.5, and R.sup.4 is H;R.sup.5, R.sup.6 and R.sup.7 are as defined in one of the following paragraphs(a) one of R.sup.6 and R.sup.7 is CF.sub.3, R.sup.5 and the other of R.sup.6 and R.sup.7 is H;(b) R.sup.5 and R.sup.6 are H; and R.sup.7 is F, Cl, or Br;(c) R.sup.5 and R.sup.7 are independently F, Cl or Br and R.sup.6 is H;(d) R.sup.5 and R.sup.6 are independently F, Cl, or Br, and R.sup.7 is H;(e) R.sup.6 and R.sup.7 are independently F, Cl, or Br, and R.sup.5 is H; or(f) R.sup.6 is phenoxy and R.sup.5 and R.sup.7 are Hare plant fungicides.

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.

Abstract: There is disclosed a method of controlling unwanted vegetation in fallow wheatland by the application of a substituted thiadiazol-2-ylurea following the harvesting of the wheat crop.