Key Points
- The average yield response of seven tall fescue trials over four years was 50 and 56% at 0.8 and 1.2l/ha of Moddus respectively.
- Best yields of Advance tall fescue and greatest margin over chemical costs in 2002/03 were at 2.0l/ha of Moddus at the heavier soil site and at 0.8 - 1.2l/ha of Moddus at the lighter soil site.
- Previous research has suggested that yield increases are related to the prevention of lodging pre-flowering. In this season there were yield increases as the rate of Moddus increased when no differences in lodging were apparent at flowering.
- Increasing spring N and topping in August did not influence seed yields.
- There were differences in the seed yield response to Moddus between different cultivars in the first year from sowing.