Leaf Rust - Wheat
Leaf rust is found throughout NZ. Rusts are wind dispersed placing all wheat crops at risk.
Look out for:
- Brown rust pustules scattered across the leaf
- Cultivar choice
- Cool, moist conditions
Early infections of leaf rust are hard to distinguish from stripe rust pustules scattered on the surface of leaves. Later stripe rust pustules, which are quite yellow, form distinct stripes whereas leaf rust pustules, which are brown, remain scattered on the leaf.
Yield losses can be high, often in the order of 15-40%.