Adjuvants Provide Important Benefits When Used with Fungicides


In the U.S., the use of adjuvants historically has focused primarily on herbicide applications. However, this is changing. It is now widely recognized that adjuvants play an important role in providing enhanced plant protection and minimizing resistance when used together with fungicides in both ground and aerial applications. The growth of the fungicide business in the U.S. has created new marketing opportunities for adjuvants. The new fungicide chemistries being developed by the basic manufacturers show promise of working well with adjuvants. New adjuvant technologies that are available today are proving to be valuable in the enhancement of fungicide deposition and in the reduction of spray evaporation. Further, as growers seek to trim production costs, more and more lower cost generic products will likely gain traction in the fungicides market thus creating additional business opportunities for adjuvants.

Adjuvants can improve canopy penetration, increase leaf coverage, and help establish a barrier on the plant leaf – all of which are key components of a successful fungicide application.  Even the simple addition of a surfactant can significantly increase coverage of a fungicide on a plant. Pictured below are contact angle close-ups of two commercial fungicide spray droplet formulations on a leaf – one which includes an adjuvant system and the other to which only water was added. The picture shows significantly diminished coverage on the leaf to which the market fungicide was applied without an adjuvant.