Fact sheet: Diseases

This fact sheet explains common diseases that affect oat crops in the Australian export fodder industry.

These diseases can reduce hay quality, lower yields and create compliance risks. Their severity depends on several factors. These include season, moisture, temperature, varietal resistance and past infections. As a result, understanding these drivers helps producers better manage disease risk.

One key disease is barley yellow dwarf virus (BYDV). It affects many cereal and grass species across Australia. However, it is more common in higher rainfall regions, such as parts of Victoria and South Australia. This disease can slow plant growth and reduce both yield and hay quality. Therefore, early identification is critical.

In addition, knowing crop growth stages supports better disease control. The Zadok’s growth scale provides a clear guide for timing monitoring and treatment. When used correctly, it helps improve decision-making in the field.

There are several ways to manage disease. For example, growers can choose resistant oat varieties. They can also use registered fungicides where needed. However, it is important to follow label directions. This includes correct rates and withholding periods.

By improving disease awareness and acting early, producers can protect hay quality, reduce losses and meet export standards.