Key Points
- Three trials (two wheat, one barley) have shown little reduction in ryegrass seed yield below approximately 20plants/m2(Figure 1).
- Teedal gave complete control of winter wheat without affecting seed yield.
- Glyphosate at 0.3l/ha and 0.25l/ha gave very good control of wheat and barley respectively without affecting seed yield.
- When applying Moddus after application of either Teedal or Glyphosate, take into consideration that, both can reduce crop dry matter by 16 and 42% respectively; in turn acting as a grow regulator themselves e.g. the addition of Moddus may act as a double PGR effect (see Table 1, compare between, 1.0l/ha Moddus and respective chemical treatments).
- Application of Glyphosate requires extreme caution in relation to rate and timing.