Indicators of wheat stem sawfly infestation include lodged plants, which may appear bent or broken near the base. Splitting the stems lengthwise can confirm the presence of larvae inside.

Observing adult sawflies flying around fields during the summer months is also a strong indication of an active population.

Adult sawflies are small and slender, with black bodies and distinctive yellow markings. They closely resemble wasps and can often be observed flying around wheat fields during the summer months. The larvae of wheat stem sawfly are white in color and lack legs. They have a distinct brown head capsule, which sets them apart from other pests.

Wheat stem sawfly is a common and persistent pest in the northern Great Plains region of the United States and Canada, including areas like North Dakota, South Dakota, Montana, and parts of Alberta and Saskatchewan.

However, the range of this pest is not limited to these specific regions alone. It is important to remain vigilant and proactive in pest management strategies, even in areas where it has not historically been observed.

Planting resistant wheat varieties (contain a solid stem trait) may be helpful for managing wheat stem sawfly. Implementing Integrated Pest Management (IPM) practices should be the first line of defense against wheat stem sawfly. This holistic approach involves:

• regularly monitoring population levels

• scouting for eggs and larvae

• considering cultural and biological control methods, including using crop rotation to disrupt overwintering insect populations

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