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Prevent Wheat Streak Mosaic Problems
The wheat curl mite that transmits wheat streak overwinters on winter wheat and a few perennial grasses. High populations of the mite are also found on corn in late summer and early fall after wheat crops have matured. The mites cannot overwinter on a cover crop that does not survive the winter.
Control of wheat streak to protect next year's crops is best handled by fall management practices. Winter wheat should be planted about September 15 in northern North Dakota and preferably later in southern regions. If planted earlier, the risk of infection and high mite buildup is very high. Mites will move into the early planted winter wheat from nearby corn fields or from volunteer wheat and will actively multiply before cool weather.
In addition to planting winter wheat after September 15, all wheat volunteers and weedy grasses should be destroyed with herbicide or tillage at least two weeks before planting winter wheat in the fall. Volunteer winter wheat should not be left standing until next spring.
Avoid planting winter wheat near green corn. Corn may be harboring high populations of mites in the fall.
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