Trinity is a new herbicide for the control of silky-bent grass, annual meadow grass and annual dicotyledonous weeds in cereals in autumn. The registration covers the use in winter barley, winter wheat, winter rye and winter triticale at a maximum dose rate of 2.0 l/ha Trinity as a post-emergence application (autumn, GS 10-13). Trinity is the first registered three-way mixture of the three established ingredients diflufenican (40 g/l), pendimethalin (300 g/l) and chlortoluron (250 g/l). All ingredients have a different mode of action according to HRAC classification: F1 (diflufenican), K1 (pendimethalin) and C2 (chlortoluron). This unique three-way mixture in Trinity leads to a very high efficacy against Apera spica-venti and Poa annua and against a broad spectrum of dicotyledonous weeds including less sensitive weeds like Papaver rhoeas, Centaurea cyanus und Geranium spp. Due to the optimal balanced amount of ingredients, Trinity has also a very good selectivity in all registered cereals. Furthermore, the advantageous regulatory restrictions of Trinity increase the attractiveness for practical use. Based on the results of multi-annual German field trials, this paper shows the efficacy and the selectivity of Trinity.
