Stripe Rust


Stripe rust, a product of Puccinia striiformis, is particularly destructive to wheat crops. Also known as yellow rust, this fungal disease can cause substantial yield losses if not promptly identified and managed. In severe cases, stripe rust can lead to up to 60% yield loss. The quality of the grain can also suffer, with lower protein content and test weight.

(Image Credit: Howard F. Schwartz, Colorado State University,


Stripe Rust Impact on Wheat

Stripe rust impacts various parts of the wheat plant, but its most noticeable effect is on the leaves. The fungus saps the nutrients from the leaf, causing it to yellow and die prematurely. This disrupts the plant's photosynthesis process, reducing its ability to produce and fill grain, resulting in shriveled kernels and diminished yield.

The disease can also compromise the plant's overall health and vigor. Infected plants may exhibit reduced tillering and may become more susceptible to other diseases and pests.

How to Identify Stripe Rust

Stripe rust is easily distinguishable by its unique yellow-orange spore masses that manifest as elongated stripes on the wheat plant's leaves and stems. These stripes, more yellow than the reddish-brown pustules associated with leaf and stem rust, serve as the primary indicator of stripe rust.

The disease initially manifests as tiny, yellow spots on the leaves. As it progresses, these spots elongate into distinctive stripes filled with yellow-orange spores. These stripes often trace the leaf's veins, hence the name 'stripe rust'.

Geographic Reach of Stripe Rust

Stripe rust flourishes in cooler temperatures, between 50-60 degrees Fahrenheit (10-15 degrees Celsius), and in regions with consistent rainfall or dew. It is prevalent in the Pacific Northwest and the Great Plains of the United States, as well as in parts of Europe, Asia, and Africa.

(Image Credit: Darrell Wesenberg,


Timing of Stripe Rust

Stripe rust usually surfaces in the early to mid-growing season, often following periods of cool, wet weather. However, it can also emerge later in the season if conditions are favorable. Early identification is crucial as stripe rust can spread rapidly, especially under windy conditions.

How to Manage Stripe Rust in Wheat

To manage stripe rust in wheat our agronomists recommend applying GCS Azoxyprop or GCS Azoxy at the first appearance of disease symptoms.

Always refer to the product label for specific application rates and instructions.


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Every product that labels STRIPE RUST as a weed, pest, or disease the product can be applied against is shown below. Click any product for label and more information.
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