Which type of adjuvant increases the viscosity of spray mixtures?

Thickeners are a specific type of adjuvant designed to increase the viscosity of spray mixtures. By doing so, they help improve the retention of the pesticide on the target surface, reducing the likelihood of run-off and improving coverage. Increased viscosity can also enhance the effectiveness of the pesticide application by ensuring that the active ingredient remains in contact with the target for longer periods, which can lead to better absorption by the plants or pests being targeted.

In the context of agricultural applications, thickeners play a crucial role in formulating effective pesticide sprays, particularly when dealing with challenging conditions such as windy weather or when applying to surfaces that may cause rapid evaporation or run-off.

Other adjuvants mentioned, such as extenders, stickers, and plant penetrants, serve different purposes. Extenders generally increase the duration of pesticide effectiveness rather than viscosity, while stickers are used primarily to enhance adhesion to surfaces. Plant penetrants work by aiding the absorption of chemicals into plant tissues but do not inherently alter the viscosity of the spray mixture. Therefore, thickeners specifically address the need for viscosity enhancement in spray formulations.