The invention relates to pesticide preparations that contain one or more pesticides and one or more N-substituted 2-pyrrolidone-4-carboxylic acid derivatives and to the use of said pesticide preparations for controlling and/or combating weeds, fungal diseases, or insect infestation. The N-substituted 2-pyrrolidone-4-carboxylic acid derivatives act as adjuvants, emulsifiers, dispersants, and/or wetting agents in the pesticide preparations.
