Management strategies have been implemented in order to limit the spread and impact of this new race. So far, no occurrence, spread or build-up has been reported outside the initial outbreak site. The fungus can invade any part of the plant, but most commonly infects the area where the leaflets join the leaf stalk. Initially, only an occasional leaf turns, but as the infection develops more leaves are affected. These lesions are usually sunken or grooved and may be found anywhere on the leaf stalk, stems, runners and burr stalks.
Infection cuts off the moisture supply, and the leaves wilt and become 'scorched'.
In severe cases affected paddocks can appear burnt or scorched. Source of infection Clover scorch is usually seen in dense, ungrazed, clover-dominated swards. However, it can also develop in more open pastures and it can persist in spite of grazing. Infected clover residues and seed carry the fungus from one season to another. New seedlings become infected as they emerge through old infected clover residues.