Abstract: 1,3,5-Triazapenta-1,4-dienes of the formula ##STR1## wherein each of R.sub.1, R.sub.2 and R.sub.3 represents hydrogen, halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, trifluoromethyl or cyano, and R.sub.4 represents C.sub.1 -C.sub.4 alkyl which is unsubstituted or substituted by halogen, a process for their manufacture and their use in pest control.

Abstract: 1,3,5-Triazapenta-1,4-dienes of the formula ##STR1## wherein each of R.sub.1 to R.sub.6 represents hydrogen, halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, trifluoromethyl or cyano, a process for their manufacture and their use in pest control.

Abstract: Novel acaricidally effective thiazoline compounds corresponding to the general formula ##STR1## wherein R.sub.1 and R.sub.2, independently of one another, represent chlorine, methyl or ethyl, whereby R.sub.2 can occupy the 4- or 6-position, with the exception that if R.sub.1 and R.sub.2 represent chlorine, R.sub.2 cannot be in the 4-position, R.sub.3 represents a straight-chain or branched-chain alkyl group having 1 to 4 carbon atoms, optionally substituted by alkoxy having 1-2 carbon atoms, or a straight-chain or branched-chain alkenyl group having 3 to 5 carbon atoms, optionally substituted by halogen including the acid addition salts, particularly the hydrochlorides, and compositions containing these compounds, as well as the use of these compounds for combatting mites, particularly ticks.

Abstract: New thioureas corresponding to the formula ##STR1## wherein R.sub.1 represents halogen or the methyl group,R.sub.2 represents C.sub.1 -C.sub.4 alkyl,R.sub.3 represents methyl or allyl andR.sub.4 represents C.sub.2 -C.sub.5 alkyl, C.sub.3 -C.sub.5 alkenyl, C.sub.3 -C.sub.5 alkynyl or hydroxy- or cyano-substituted alkyl, benzyl, cycloalkyl-alkyl, or tetrahydrofurylalkyl,Which are useful for the control of arachnida, particularly ticks.

Abstract: Phenylformamidines of the formula ##SPC1##Wherein R.sub.1 represents hydrogen, alkyl, alkenyl or alkynyl, R.sub.2 represents .alpha.-naphthyl, ##SPC2##Or substituted phenyl,Wherein the phenyl group is not substituted simultaneously in the 2-position by a methyl group and in the 4-position by a chlorine atom, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 represent one or more radicals which are the same or different, such as hydrogen or halogen atoms or alkyl, alkoxy, alkylthio, alkenyloxy, alkynyloxy, alkoxycarbonyl, CF.sub.3, cyano or nitro groups, their process for the manufacture and their use in pest control.