Ciba-geigy Corporation

Paul Rathgeb

Karl Hoegerle

Karl Gass

Christian Vogel

Denis V Varsanyi

Jean Claude Tournayre

Hans Joerg Cellarius

Jurg Rumpf

Compounds of the formula ##STR1## are described in which R.sub.1 represents a perfluoroalkyl radical of from 1 to 2 carbon atoms, and at least one of R.sub.2 and R.sub.3 represents hydrogen, and the other, or both represent lower alkyl, and R.sub.4 represents a lower alkyl radical which may be unsubstituted or bear certain substitution, and which are useful as herbicides in a method for controlling weeds and wild grasses. Compositions containing such compounds are also described. Finally, novel fluoro-thio semicarbazides are described which are useful intermediates in the production of the compounds of Formula I.

1,3,4-thiadiazolyl ureas and processes for controlling weeds and wild

Thiophosphorylguanidines as hereinafter defined in formula are effective for combating pests, such as insects, Acarina, microorganisms, and preferably phytopathogenic nematodes. The new compounds act systemically.

Thiophosphorylguanidines for combating pests

New derivatives of 1,3,4-thiadiazolyl-(2)-hexahydrotriazinon of formula ##STR1## wherein R.sub.1 and R.sub.2 are independently of each other C.sub.1 -C.sub.4 alkyl or together with the nitrogen atom to which they are linked a pyrrolidino, piperidino or morpholino ring and

1,3,4-Thiadiazolyl-(2)-hexahydro-triazinones

Methanesulphonic acid-2-bromoethyl ester has been found to possess nematocidal properties. It may be used in the form of suitable compositions.

Methanesulfonic acid-2-bromoethyl ester nematocide

Agent for the regulation of plant growth, which agent contains as active substance at least one acylamine of the formula ##SPC1## Wherein R.sub.1 represents hydrogen, methyl or ethyl, R.sub.2 represents hydrogen, methyl, ethyl, n-propyl, isopropyl, methoxyethyl, allyloxymethyl or lower alkyloxymethyl, and n denotes the number 3 or 4.

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Basel, Switzerland

Paul Rathgeb