Friday, November 30, 2012

Where Can I Hear "the Scoop" about Potential Plant Problems in Illinois?

The Plant Clinic is gearing up for many presentations across Illinois this winter that will address plant problems of interest.  Here are the locations, schedule, and topics:

Mid-America Horticultural Trade Show, Navy Pier, Chicago, Illinois
For more information:  http://www.midam.org/

Wednesday, January 16th, 2013
A Year in Drought at the University of Illinois Plant Clinic


In this presentation, Stephanie will report the current happenings at the U of I Plant Clinic as well as the major problems that were observed on trees, shrubs, and other ornamentals in Illinois during 2012.  My focus will include abiotic problems such as frost injury, drought stress, and iron chlorosis as well as biotic diseases diagnosed such as bacterial blast of pear, fungal tree cankers, and prevalent oak diseases (oak wilt, bacterial leaf scorch, and Bur oak blight).  Further discussion will highlight unique disease and stress issues that were seen at the U of I Plant Clinic in 2012. There will be further discussion regarding Boxwood Blight, a serious disease found in the US, but not yet in Illinois.

2013 Crop Management Conferences

  • Jan. 22-23: Springfield – Northfield Inn Conference Center. For more information, contact Robert Bellm, 618-427-3349; rcbellm@illinois.edu.
  • Jan. 29-30: Mt. Vernon – Krieger/Holiday Inn Convention Center. For more information, contact Robert Bellm, 618-427-3349; rcbellm@illinois.edu.
  • Feb. 5-6: Champaign – I-Hotel and Conference Center. For more information, contact Dennis Bowman, 217-244-0851; ndbowman@illinois.edu.
  • Feb. 12-13: Malta – Kishwaukee College Conference Center. For more information, contact Russ Higgins, 815-274-1343; rahiggin@illinois.edu 

Viruses Lurking in Fields
In this presentation, either Stephanie Porter or Suzanne Bissonnette will review viruses that could be a threat to crops in Illinois. An emphasis will be on the Soybean Vein Necrosis Virus, which was prevalent in Illinois soybean fields during the 2012 growing season.

Gateway Green Industry Conference, Collinsville, Illinois

Wednesday, February 20th, 2013

A Year in Drought at the University of Illinois Plant Clinic

In this presentation, Stephanie will report the current happenings at the U of I Plant Clinic as well as the major problems that were observed on trees, shrubs, and other ornamentals in Illinois during 2012.  My focus will include abiotic problems such as frost injury, drought stress, and iron chlorosis as well as biotic diseases diagnosed such as bacterial blast of pear, fungal tree cankers, and prevalent oak diseases (oak wilt, bacterial leaf scorch, and Bur oak blight).  Further discussion will highlight unique disease and stress issues that were seen at the U of I Plant Clinic in 2012. 

Illinois First-Detector Tree-Pest Training Program

  • Springfield, U of I Extension conference room, Feb. 12, 9 a.m. to 3 p.m.
  • Quad Cities, Deere-Wiman Carriage House, Feb. 26, 9 a.m. to 3 p.m.
  • Mt. Vernon, U of I Extension conference room, March 7, 9 a.m. to 3 p.m.
  • Collinsville, U of I Extension conference room, March 14, 9 a.m. to 3 p.m.
  • Champaign, U of I Extension conference room, March 21, 9 a.m. to 3 p.m.
  • Lemont, University of Illinois Extension, Midwest Golf House Complex, March 26, 9 a.m. to 3 p.m.
The 2013 program will focus on Emerald Ash Borer (EAB), thousand canker disease (TCD), and invasive plant species. Subjects to be covered in the course include:
  • Identification/detection,
  • Life cycle/biology,
  • Hosts,
  • Sampling,
  • Management,
  • Commonly confused look-alikes,
  • Regulation



Thursday, November 1, 2012

Bacterial Leaf Scorch Testing at the U of I Plant Clinic




Oak infected with Bacterial Leaf Scorch (BLS)



Tree samples ready for Bacterial Leaf Scorch testing at the U of I Plant Clinic.

Cutting petioles for testing them and carefully weighing out each stem sample.

Leaf petiole sample and buffer are added to the bag and ready for grinding within the mesh sample bag.

Loading the test wells for BLS testing.

Added the control buffer to the wells....now time to incubate!

Incubating for 2 hours!

Time to rinse out the wells (8 times).

Making the conjugate to be added to the wells.

Filling the wells with enzyme conjugate and letting incubate again
Incubating again for 2 hours.
Second rinse (8 times)



Add substrate solution and the wait up to 20 (+) minutes.
The blue color indicates a positive result or presence of the pathogen in a particular sample.