DTM*3300 Turf Insects and Weeds

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The following description is for the course offering in Fall 2019 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.

This course discusses the biology, ecology and management of turfgrass insects and weeds, emphasizing cultural methods of management as well as chemical and biological controls. Field recognition and diagnosis of weeds and insect pests are taught and the impact of control methods on the environment and the ecology of turfgrass systems are discussed.

Prerequisite(s): DTM*1100


Teaching Assistant:

Sara Stricker

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:

After successfully completing the course, students will be able to:

  1. Define the principal methods of management for insects and weeds of turf as demonstrated through successful completion of quizzes and exams.
  2. Determine and conceptually explain the conditions for the successful management of both insects and weeds in turfgrass systems through the use of integrated methods; demonstrated through successful completion of exams.
  3. Differentiate alternative and conventional management of insect and weed pests in their effects on the environment and the turfgrass ecosystems; as demonstrated by successful completion of quizzes, assignments and exams.
  4. Identify and categorize the most important insect pests and weeds found in turfgrass systems, primarily in Ontario; demonstrated by successful completion of lab assignments and quizzes.
  5. Recognize the effects of the main herbicides used for turf weed control as demonstrated by successful completion of lab assignments.

Lecture Content:

Insect Pests Section

  • Insect Biology and classification
  • Insects as pests
  • Root-feeding pests
  • Stem-feeding pests
  • Insect management, with and without pesticides
  • Bio-control and cultural control (Intro to IPM concepts)
  • Pesticide modes of action
  • Insects of trees and shrubs (if time permits)

Weeds Section

  • Weed biology and classification
  • Weeds as pests
  • Weed competition
  • Weed management
  • Herbicide modes of action
  • Weed control without herbicides
  • Weed control and the Pesticide Ban
Labs & Seminars:

Laboratory classes will be a combination of lecture material and practical observation of specimens. Topics to be covered in labs include:

Insect Pest Section

  • Insect identification, Orders
  • Root-feeding pests
  • Insects infesting stems, leaves and sap (piercing sucking)
  • Insects of trees and shrubs

Weed Section

  • Annual dicot weeds
  • Perennial dicot weeds
  • Grass weeds
  • Herbicide mode of action

Course Assignments and Tests:

Assignment or Test
Contribution to Final Mark

Lecture Quizzes*

15% **

Lab exam


Lecture Exam


Lab assignments







Final examination:

Please refer to Web Advisor for examination schedule and location.

Course Resources:

Required Texts:


Recommended Texts:

Vittum, P. et al. (eds.)  1999.  Turfgrass Insects of the United States and Canada.  Cornell Univ. Press.

Potter, D.A.  1998.  Destructive Turfgrass Insects: Biology, Diagnosis and Control, J. Wiley & Sons.

Lab manual:


Other Resources:

Other reading materials and links to pertinent web sites will be posted on the CourseLink site for the course.

Field Trips


Course Policies:

Policy on Late Assignments:
  1. Answers to all take home assignments are due at the beginning of class on the dates specified. A penalty of 10% per day will be deducted for late assignments. Requests for extensions due to illness or other personal issues must be made in writing and accompanied by appropriate supporting documentation.
  2. Rescheduled exams: The insects exam and the final exam must be written on the date scheduled unless there is a documented timetabling conflict. Please advise the instructor in writing of any scheduling conflict prior to Week 3 for the Insects exam and  prior to Week 7 for the final exam.

Students have 5 class-days upon receiving assignments to appeal to the instructor. The entire assignment will be re-evaluated for accuracy of grading.

Course Policy on Group Work:

Students are expected to produce individual reports or assignments even when they worked in groups unless specifically stated by the instructor. 

Course Policy regarding use of electronic devices and recording of lectures:

Electronic recording of classes is expressly forbidden without consent of the instructor.  When recordings are permitted they are solely for the use of the authorized student and may not be reproduced, or transmitted to others, without the express written consent of the instructor.

Other Course Information:

University Policies

Academic Consideration

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The Academic Misconduct Policy is detailed in the University Calenders:


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