DTM*3200 Turfgrass Diseases

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The following description is for the course offering in Fall 2021 and is subject to change. It is provided for information only. The course outline distributed to the class at the beginning of the semester describes the course content and delivery, and defines the methods and criteria to be used in establishing the final grades for the course.

The ecology of turfgrass diseases and cultural methods of management will be emphasized, in addition to field recognition and microscopic diagnosis of diseases. Advances in biological and chemical control measures, and their impact on turfgrass ecosystems and surrounding environments will also be discussed. This course will interest students who plan a career in turfgrass management, but will also be useful to those interested in maintaining healthy home lawns.

Pre-Requisite(s): DTM*1100


Teaching Assistant:

Moez Valliani

Credit Weight:


Course Level:

  • Diploma

Academic Department (or campus):

Department of Plant Agriculture



Semester Offering:

  • Fall

Class Schedule and Location:

Please refer to Web Advisor for class schedule and location.

Learning outcomes:

By the end of this course, you should be able to:

  1. describe major groups of cool season (northern temperate zone) turf diseases
  2. properly identify causal agents in turf disease samples using a diagnostic manual and a microscope
  3. recognize the effects of environmental conditions on turf diseases
  4. recognize the impact of turf disease management practices on the environment
  5. differentiate between biotic and abiotic disease symptoms
  6. use cultural, biological and chemical techniques to minimize severity of turfgrass diseases 

Lecture Content:

This course covers the biology and management of turfgrass diseases and disorders emphasizing their ecology and cultural, biological and chemical means of control. Laboratory identification and field recognition of common turfgrass diseases are discussed, along with the impact of control methods on the environment.

Topis to be covered in lectures include:

  • Introduction to Plant Pathology: disease triangle and cycles
  • Winter diseases:  grey snow mold and pink snow mold
  • Spring Diseases: Fusarium patch, Leaf spots and melting out
  • Root diseases: necrotic ring spot, take-all patch, summer patch, fairy ring
  • Summer diseases:  dollarspot, brown patch, anthracnose, pythium blight and root rot
  • Other diseases: red thread and yellow patch, powdery mildew and rust
  • Abiotic and miscellaneous diseases: slime molds, moss and algae, abiotic
  • Fungicides - toxicity, cost, types, regulation
  • Turf disease prediction
  • Turf disease research
Labs & Seminars:

Topics to be covered in labs inculde:

  • Introduction to plant pathogens: nematodes, bacteria, fungi
  • Snow mold diseases
  • Spring diseases (Fusarium Patch, Leaf spots, other leaf spots)
  • Root diseases (NRS, TAP, SP, other)
  • Summer diseases (Dollar spot, Fairy Ring, brown patch, anthracnose, pythium)
  • Other diseases (Powdery mildew, Red thread, Yellow patch, Waitea Patch, Rust, Moss and algae, Black layer, Dog patch, Seed rot and damping off) 
  • New diseases: Gray Leaf Spot, Rapid Blight, Bacterial Wilt
  • Using disease key (practice identifying unknowns on slides or live samples)

Course Assignments and Tests:

Assignment or Test
Contribution to Final Mark

Lab Quizzes


Midterm Exam


Final Exam


Final examination:

Please refer to Web Advisor for class schedule and location.

Course Resources:

Lectures will be given in class. PDF versions of the lecture material will be presented on the course website.

Labs will be given in person. PDF version of the lab material will be presented on the course website.

Recommended Resources:

OMAFRA 845, Integrated Pest Management for Turf (downloadable)

OMAFRA 384, Protection Guide for Turfgrass (downloadable)

Course Policies:

Grading Policies:

Please advise the instructor of examination conflicts as soon as possible.  If you have an illness or other problem, please see your program counsellor and ask them to issue a notice to instructors. There are no make-up opportunities for lab quizzes or the midterm, but academic consideration (such as transfer of marks to the final exam) may be given with appropriate supporting documentation.

Other Course Information:

University Policies

Academic Consideration

When you find yourself unable to meet an in-course requirement because of illness or compassionate reasons, please advise the course instructor in writing, with your name, id#, and e-mail contact. See the academic calendar for information on regulations and procedures for Academic Consideration:

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The Academic Misconduct Policy is detailed in the University Calenders:


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