Corn Disease

C.O.R.N. Newsletter Articles

Tar Spot of Corn

Author(s): Pierce Paul , Author(s): Felipe Dalla Lana da Silva

Tar Spot, a new disease of corn caused by the fungus Phyllachora maydis, was reported for the first time in Ohio at the end of the 2018 growing season. At that time, it was found mostly in counties close to the Indiana border, as the disease continued to spread from the middle of country where it was first confirmed in 2015. Over the last few weeks, there have been several new, confirmed report of Tar Spot in Ohio, this time not only in the northwestern corner of the state, but also from a few fields in central and south-central Ohio.

Issue: 2020-03
Tar Spot of Corn in Ohio Again this 2019

Author(s): Pierce Paul , Author(s): Felipe Dalla Lana da Silva

Tar Spot, a new disease of corn caused by the fungus Phyllachora maydis, was reported for the first time in Ohio at the end of the 2018 growing season. At that time, it was found mostly in counties close to the Indiana border, as the disease continued to spread from the middle of country where it was first confirmed in 2015. Over the last few weeks, there have been several new, confirmed report of Tar Spot in Ohio, this time not only in the northwestern corner of the state, but also from a few fields in central and south-central Ohio.

Issue: 2019-35
Delayed Corn Planting the Disease Risk in Corn

Author(s): Pierce Paul

Disease Risk. In Ohio, several foliar diseases are of greater concern in late-planted corn for a number of reasons, including: 1 – for diseases like gray leaf spot (GLS), northern corn leaf blight (NCLB), and eye spot that are caused by pathogens that overwinter in corn stubble, delayed planting allows more time for inoculum (spores) to buildup, especially in no-till, corn-on-corn fields and 2 – for diseases like common and southern rust that are caused by pathogens that do not overwinter in Ohio, planting late allows more time for spore fo

Issue: 2019-23
Western ARS Agronomy Field Day, Wednesday July 17, 2019

Author(s): Harold Watters, CPAg/CCA

The Western Agricultural Research Station Agronomy Field Day will be held July 17^th. The station is mostly planted but everything went in on the edge – as you saw it on your farm too. Hear our researchers thoughts and recommendations on how to manage this interesting season.

A couple of items we will walk through are:

Issue: 2019:20
American Society of Agronomy Webinar Series on Fusarium Head Blight

Author(s): Pierce Paul

A national group of plant pathologists, including Pierce Paul from The Ohio State University, will be presenting a two-part webinar series to help U.S. wheat producers management Fusarium head blight (FHB), also known as head scab or scab. FHB affect wheat, barley and other small grain crops, reducing yield and contaminating grain with mycotoxins such as deoxynivalenol, AKA vomitoxin.

Issue: 2019-03

Publications

Abnormal Ear Diagnosis Poster, ACE-1

Abnormal Ear Diagnosis Poster, ACE-1. Farmers frequently encounter abnormal corn ears in their fields when the crop has experienced a major stress, such as drought, temperature extremes, disease, insect injury, or misapplied chemicals. These abnormalities often affect yield and grain quality adversely. In this poster, ten abnormal corn ears with distinct symptoms and causes are highlighted.
Corn Disease Management in Ohio, Bulletin 804

Corn Disease Management in Ohio, Bulletin 804. Five to 15 percent of Ohio's corn crop is lost to disease each year, amounting to nearly $100 million in lost farm income. Corn diseases include seedling diseases, leaf blights, stalk rots, ear and kernel rots, and viruses. This bulletin describes the disease symptoms, provides color images, gives the environmental factors favoring the disease, the method of transmission and infection, and management options for the major diseases affecting corn in Ohio.