Tar Spot is a relatively new corn disease that was first identified in the United States in 2015. It is caused by a fungus that can overwinter in corn stalks and leaves. Tar Spot can cause significant yield losses, especially in wet and humid conditions.
Conditions have been favorable for Tar Spot to spread in Michigan this growing season. The state has had cool mornings and heavy dews, which are ideal conditions for the disease to thrive. In addition, Michigan has had a wet spring, which has also contributed to the spread of Tar Spot.
Experts are recommending that farmers apply fungicide to protect their corn crops from Tar Spot. Fungicide applications should be made when the corn is in the V6 to V8 stage of growth. Fungicide can be applied as a foliar spray or as a seed treatment.
Farmers should scout their corn fields regularly for Tar Spot. The disease can be identified by the presence of black, tar-like spots on the leaves of the corn plant. If Tar Spot is found, it is important to apply fungicide as soon as possible to prevent the disease from spreading and causing yield losses.
Tar Spot is a serious threat to corn crops in Michigan. By following the recommendations of experts and applying fungicide, farmers can protect their yields and reduce the impact of this disease.
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Categories: Michigan, Crops, Corn