Duphar International Research Bv

Jacobus H Eussen

Kobus Wellinga

The invention relates to a herbicidally active compound of the general ##STR1## wherein R.sub.1, R.sub.2 R.sub.3 and R.sub.4 are equal or different and represent hydrogen atoms, alkyl groups having 1-6 carbon atoms, cycloalkyl groups having 3-6 carbon atoms or alkoxycarbonyl groups having 2-5 carbon atoms;

1-carbonyl-2-pyrazoline derivatives having herbicidal activity

The invention relates to a herbicidally and/or algicidally active compound of the general formula ##STR1## wherein R.sub.1 is a substituted or non-substituted alkyl group having 1-6 carbon atoms, or an alkenyl or alkynyl group having 2-6 carbon atoms;

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Weesp, Netherlands

Jacobus H Eussen