Description: 504 plant protecting and regulating compositions / 504 plant protecting and regulating compositions/(116.1) plant growth regulating compositions (e.g., herbicides, etc.) (150) aquatic plant regulator (e.g., algicides, etc.) (161) active ingredient contains a ketone, aldehyde, ether, or hydroxy group, wherein the h of the hydroxy group may be replaced by a substituted or unsubstituted ammonium ion or a group ia or iia light metal
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