Rex Ultra

Reliable cereal protection with «Rex Ultra»

When it comes to maintaining the yield potential of wheat and barley, agronomists rely on proven systemic solutions. The «Rex Ultra» fungicide from BASF SE, Germany, is a classic protection tool that combines epoxiconazole and fenpropimorph to deliver essential field results: rapid stop-action and long-term prevention.

Application scenarios on the farm

The primary task of this product is to protect crops in fields with high infection pressure where speed of pathogen control is critical. In real-world farm conditions, it is used in two key scenarios:

• First application (T1): When it is necessary to clear the crops of overwintered powdery mildew and early symptoms of leaf blotch. Fenpropimorph in the formulation works effectively even at low temperatures during early spring.
• Second application (T2): Protecting the flag leaf and the ear from a complex of rusts and septoria. Epoxiconazole acts here as a powerful systemic component that redistributes through the leaf tissue to protect new growth.

Practical usage nuances

The product comes as an aqueous emulsion, which simplifies the preparation of tank mixtures. It is important to note that «Rex Ultra» is classified as a category 3 hazard and requires strict adherence to regulations. The application rate varies from 0.5 to 1 liter per hectare, depending on the severity of the infection and the crop's growth stage. The maximum allowed frequency is 2 treatments per season, and the final application must be completed at least 35 days before harvest.

This fungicide is indispensable for controlling eyespot (Cercosporella) and Fusarium head blight. Due to its dual mode of action — contact and systemic — it does not only treat existing infection centers but also creates a barrier that prevents re-infection under high humidity conditions.