Diseases

Soybean Rust found in Southern Illinois 2016

  • September 20, 2016

  • Suzanne Bissonnette

Soybean rust (Phakopsora pachyrhizi) has been found in southern Illinois.  Samples were collected in Williamson county on 9/11/16 to make observations for other fungal foliar leaf disease. Soybean rust was found sporulating in pustules on the bottom surface of the leaves.  The field was at R6 so yield loss to that field is unlikely.  While this very late in the season,  there are still many fields in southern Illinois that are  green and producers should consider scouting for soybean rust.…

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2016 Tar Spot again found on corn in Northern Illinois

  • September 13, 2016

  • Suzanne Bissonnette

Corn leaf samples from LaSalle county have been positively identified by the University of Illinois Plant Clinic to be infected with Tar Spot Phyllachora maydis.  Commercial Agriculture Extension Educator Russ Higgins found the disease while field scouting.  The fungal leaf blight was identified in numerous northern Illinois and northern Indiana counties in 2015.
Tar Spot has distinctive signs and symptoms. The fungal fruiting body, called an ascomata, looks like an actual spot of tar on the leaf. …

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New bacterial leaf disease “Bacterial leaf streak” identified in one northern Illinois County

  • August 26, 2016

  • Suzanne Bissonnette

Extension Staff Join with other Agencies to Survey Illinois for New Corn Disease 2016: The USDA just announced the presence of Bacterial leaf streak in corn, as determined by recent surveys of the Corn Belt states.  In Illinois, a cooperative survey was organized with APHIS-PPQ (Animal Plant Health Inspection Service), IDA (Illinois Department of Agriculture), CAPS (Illinois Natural History Survey’s Cooperative Agricultural Pest Survey) and University of Illinois Extension to provide a rapid response to determine distribution.…

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University of Illinois Plant Clinic: Celebrating 40 Years of Service to Illinois

  • May 18, 2016

  • Suzanne Bissonnette

Anniversary Overview of Plant Clinic: Welcome to another year of service at the Plant Clinic! Since 1976, the University of Illinois Extension Plant Clinic has served as a clearinghouse for plant problems. Housed first in the Department of Plant Pathology and now Crop Sciences, the Plant Clinic was originally developed to help County Cooperative Extension staff and campus-based Extension specialists with requests for diagnoses on a wide variety of plants. By acting as a centralized diagnostic laboratory,…

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Another CORN DISEASE ALERT: New Bacterial leaf disease ‘Bacterial Stripe’ (Burkholderia andropogonis) of Corn identified in Illinois

  • October 5, 2015

  • Suzanne Bissonnette

Symptomatic corn leaf samples from Champaign County, Illinois have been confirmed positive for the bacterium Burkholderia andropogonis (Pseudomonas adropogonis (Smith) Stapp.) the causal agent of Bacterial Stripe disease by the University of Illinois Plant Clinic. This has been reported to the Illinois Department of Agriculture and the USDA. The pathogen was identified by symptomology, bacterial colony characteristics and  16S DNA sequencing.
Bacterial stripe foliar symptoms unfortunately are similar to other endemic bacterial leaf pathogens of corn,…

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CORN DISEASE ALERT: New Fungal Leaf disease “Tar spot” Phyllachora maydis identified in 3 northern Illinois counties

  • September 21, 2015

  • Suzanne Bissonnette

Tar spot confirmed:  Announced by the Illinois Department of Agriculture today. Corn leaf samples from 3 northern Illinois counties have been confirmed positive for the fungus Phyllachora maydis by Megan Romby National Plant Pathologist with the USDA Animal Plant Health Inspection Service in Beltsville, MD. Positive counties in Illinois are LaSalle, DeKalb and Bureau. The samples were collected from commercial fields by Monsanto breeders and pathologists and sent to Dr. Kiersten Wise in response to her inquiry for samples and distribution information of the Tar spot pathogen.…

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Ewing Demonstration Center Fall Field Day – September 10th

  • August 28, 2015

  • Nathan Johanning

The University of Illinois Extension will host its annual Ewing Demonstration Center Fall Field Day on Thursday, September 10, 2015 at 9:00 a.m.  The Ewing Demonstration Center is located in southern Illinois about 20 miles south of Mt. Vernon at 16132 N. Ewing Rd; Ewing, IL 62836.  It is on the north edge of the village of Ewing, north of the Ewing Grade School on north Ewing Road.  Watch for signs.
The ongoing research this year includes trials on soybean cover crops,…

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