Abstract: The invention provides a method of reducing the feeding activity of insects on plants with the aid of 1,2,3-triazoles being unsubstituted in the 4- and 5-positions and bearing a phenyl moiety in the 1-position, fungicidal compositions comprising such triazoles and novel 1,2,3-triazoles.

Abstract: The present invention concerns novel pyrimidinyl phosphoric and thiophosphoric esters. ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are substituents, e.g. alkyl,R.sub.4 is an amino or heterocyclic function andZ and Y are bridging functions, e.g. oxygen.The compounds are useful insecticides.

Abstract: The present invention concerns novel N,N'-diphenyl-N-(N"-alkylcarbamoyl)formamidine derivatives of the formula: ##EQU1## wherein R.sub.1 is hydrogen or alkyl, R.sub.2 is alkyl and Ar.sub.1 and Ar.sub.2 are each phenyl or a substituted phenyl, which compounds are useful as herbicides.The present invention relates to N,N'-diphenyl-N-(N"-alkylcarbamoyl)formamidine derivatives.The present invention provides compounds of formula I, ##EQU2## wherein R.sub.1 is hydrogen or alkyl of 1 to 4 carbon atoms,R.sub.2 is alkyl of 1 to 4 carbon atoms, and eitherAr.sub.1 and Ar.sub.2 are the same, and are each phenyl or a substituted phenyl group selected from ##SPC1##WhereinR.sub.3 is chlorine, bromine, methyl, methoxy, or dimethyl or diethylsulphonamide andR.sub.4 is chlorine, bromine, methyl, methoxy or trifluoromethyl, orAr.sub.2 is phenyl andAr.sub.1 is a substituted phenyl group selected from ##SPC2##WhereinR.sub.3 ' is chlorine or methyl andR.sub.4 ' is chlorine, methyl or trifluoromethyl,With the proviso that Ar.sub.

Abstract: The present invention concerns novel 4-hydroxypyrimidine derivatives of the formula: ##SPC1##Wherein R.sub.1 is a substituent, e.g., alkyl, R.sub.2 is hydrogen or a substituent, e.g., alkyl R.sub.3 is amino unsubstituted or substituted by alkyl, a nitrogen heterocycle, alkoxy or alkylthio, which are used as intermediates in the production of useful insecticides.