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Tar spot on corn confirmed in the United States

Tar spot, a corn disease not previously reported in the United States was identified in Indiana this week. Samples were confirmed by a national plant pathologist with the USDA Animal Plant Health Inspection Service in Beltsville, Md. This is the first confirmation of this disease in the United States.


Lots of stalk rots reported in the Midwest

Stalk rots are common in the Midwest and are in every field to some extent. Identifying the specific type of stalk rot is easier during early stages of development, but becomes more difficult late in the season when multiple stalk rots become established in the same plant.


Syngenta receives EPA registration for Solatenol

Syngenta announced that its newest succinate dehydrogenase inhibitor (SDHI) fungicide – Solatenol – has received registration from the U.S. Environmental Protection Agency and is now available in four product offerings, pending individual state registrations. Solatenol fungicide is now available for use by U.S. growers on a wide range of crops.


Goss’ wilt marches east in Indiana

Goss’s wilt of corn, caused by the bacterium Clavibacter michiganensis subsp. nebraskensis, has been confirmed in several fields in northeast Indiana in 2015, making these the most eastern confirmations of the disease in the state to date. The disease has also been detected in northwest Indiana this year.


Stopping Diplodia ear rot from spreading

Diplodia ear rot, caused by the fungus Stenocarpella maydis (formerly known as Diplodia maydis), has been observed in Kentucky corn fields the last couple of weeks. These observations are due to the frequent rainfall that occurred just before and throughout silking. Corn ears are most susceptible to infection by this ear rot fungus from beginning silking to approximately 3 weeks later.


Southern rust confirmed in South Dakota corn

Southern rust was found in Union, Clay and Minnehaha Counties at low incidence and severity, announced Emmanuel Byamukama, SDSU Extension plant pathologist.


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