Adjuvants are substances used with other plant-protection chemicals or fertilisers to improve the treatment performance. Using adjuvants helps to: reduce surface tension of the working solution provide better coverage of the leaf surface improve the wettability of the leaf surface educe the risk that the product may be washed away by rain improve the treatment effectiveness reduce foaming of the working solution. With the combined use of plant-protection products and adjuvants, lower doses of chemicals can be used without compromising the effectiveness of plant-protection.