The disease was particularly severe in a trial at Fairlie late in the season.
It was also seen in other parts of South Canterbury and at Methven at the end of the season.
Tan ppot is a significant disease in Australia, the US and Europe and has the potential to rob crop yields in this country.
Craigie says it’s a stubble-borne disease so it’s more of a problem in second-year or continuous wheats. It is a wet-weather disease spread by rain splashes. The disease can take off within seven days and is difficult to control because it cycles so rapidly.
There is no New Zealand data on chemical control, but Proline and propiconazole is mentioned in Australian data.
