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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.

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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.

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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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Corn foliage diseases

This is shaping up to be another “interesting” year for corn in Missouri and most of the Midwest. Prolonged periods of wet weather and then flooding delayed planting or led to replanting. Overall the corn crop is behind normal. There is also a wide range in growth stages of corn across the state and even in individual fields.

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Seed decay and seedling blights of corn

Corn planting was later than normal and later than last year because of usually wet conditions across most of the state. The unusual fluctuations in air temperatures and soil temperatures further impact corn germination and emergence as well as seedling vigor and thus impact the amount of seed decay, seedling blight and crown rot which may occur.

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