All course information is listed within this syllabus.

PPEM 300: Horticultural Crop Diseases (3 credits). The concepts of plant pathology are introduced to describe how plants, the environment, and biotic and abiotic plant pathogens interact over time to cause disease. Understanding these relationships can help to prevent disease problems or increase management and control options.

Prerequisites: None

PPEM 300 fulfills a general education requirement for natural sciences (GN).

Instructor

Instructor For PPEM 300.

Christina Fox Call, Ph.D.
Associate Professor

Department of Plant Pathology and Environmental Microbiology
115 Buckhout Laboratory
University Park, PA 16802

Phone (Office): 814-863-4292
E-mail: Use Canvas Inbox

Office Hours: Tuesdays 11:20 a.m.–12:00 p.m. or by appointment via Zoom

My interests include crop pathology and horticultural/agricultural education, including plant and seed pathology. I have spent a great deal of my career building online curricula and teaching online courses, and I'm excited to share this course with you.

Course Overview

This web-based course introduces the basic concepts and practices of plant pathology. Students learn how to recognize and diagnose plant diseases, and how to avoid and manage disease development. The interaction of plants, the environment, and pathogens over time influences disease development. Students learn what to look for to diagnose plant problems and what treatments or management strategies are most useful to employ, when, and why. The roles that plant pathogens play in national and international trade, biosecurity, and natural environments are discussed.

Personal feedback is provided on assignments and other questions. The online format allows students to access module readings and complete assignments independently, on their own schedule, at home or elsewhere.

Some customized assignments allow students to utilize their choice of plant material. Students read the course materials and apply them to their own local plant environment to complete diagnoses and other reports.

Course Objectives

  • explain the many causes of plant biotic and abiotic diseases
  • describe how plants, the environment, and biotic and abiotic agents interact to influence disease
  • diagnose, assess the threat of disease, and manage key diseases of horticultural crops
  • analyze the economic and social impacts of plant diseases on horticultural crops, including how global trade contributes to the spread of pathogens affecting agriculture, forestry, and native ecosystems
  • explain how plant pathology integrates multiple biological disciplines and assess its impact on society and the environment

Course Requirements

  • Internet connection for accessing course material online, correspondence with an instructor, taking quizzes and tests, and uploading assignments with original student photographs.
  • Phone camera (or digital camera). Students must submit original photographs as part of their assignments. (Nothing fancy, just need moderate resolution and a steady hand for good focus!)
  • The ability to access, observe, photograph, and document plants in the student's environment.
  • Basic photography is required, and most students use cameras on their cell phones or inexpensive digital cameras. A close-up setting is very useful to capture the disease signs and symptoms. Avoid blurry photos by using a steady hand and patience in finding a non-windy time/location with good lighting. Minimally, a moderate resolution is needed to avoid pixelation in detail.

Course Schedule

For due dates, refer to the Course Summary on the Syllabus page in Canvas.

Course Materials

No textbook is required for this course. All materials will be available in Canvas in the form of weekly modules.

A camera is required (phone cameras are fine) to complete assignments with original images.

Assignments

Quizzes

Quizzes are "open book." All answers are in the proper context in the modules, so it is highly recommended that you read the course materials before taking the quiz. Answers from other sources are not accepted.

Pay attention to spelling for "fill in the blank" answers. Incorrectly spelled answers will not "match" the correct answers and will be graded as incorrect. There may be one or many correct answers to some questions.

Each quiz is based on a large question bank. It is likely that each person has a unique set of questions, different from everyone else taking the quiz. Please remember that quizzes are taken individually and are not a team activity.

Two Virtual Lab Reports

  • Lab #1: Fungicide Resistance
  • Lab #2: Damping-Off

Ten Disease Diagnosis Exercises

These exercises require you to integrate what you learn by selecting the location and the plant materials of your interest to evaluate. Utilizing the information in this course, you will assess the threat of disease on plants at real locations. The topics are:

  • leaf spot
  • powdery mildew or rust disease
  • stem rot, root rot, or fruit rot
  • hazard tree or wood rot
  • canker or disease-related gall

Final Exam

The online final exam is comprehensive and will be given in the final week. Students must take the final exam individually and may not share answers or work collaboratively.

Grading Policy

The following table is the grading criteria for the course.

Grading Criteria
Requirement Cumulative Point Value
Quizzes 150
Labs 50
Disease Diagnosis Exercises 200
Final Exam 100
TOTAL: 500

The following table is the grading scheme for the course.

Grading Scheme
Letter Grade Percentage Lowest Number of Points Earning the Letter Grade
A 100% – 93% 465
A- < 93% – 90% 450
B+ < 90% – 87% 435
B < 87% – 83% 415
B- < 83% – 80% 400
C+ < 80% – 77% 385
C < 77% – 70% 350
D < 70% – 60% 300
F < 60% 295

Please refer to the University Grading Policy for Undergraduate Courses for additional information.

Note: If you are planning to graduate this semester, please communicate your intent to graduate to your instructor. This will alert your instructor to the need to submit your final grade in time to meet the published graduation deadlines. For more information about graduation policies and deadlines, please see "Graduation" under World Campus Student Resources.

Online Students' Use of the Library

As Penn State students, you have access to many of the materials that the library offers to students. The library website has a lot to offer, but it can be overwhelming. A guide has been created to serve as your introduction to important library resources, services, and pages within the library. The Online Student Library Guide is updated regularly by the online librarian. It is intended to provide a level of comfort through an introduction to help you feel comfortable navigating the library website to find valuable information for your coursework.

Technical Requirements

This course is offered online and it is assumed you possess the minimum system requirements and computing skills to participate effectively. A list of technical requirements is listed on World Campus' Penn State Technical Requirements page.

Minimum Skills

  • You should have an understanding of basic computer usage (creating folders/directories, switching between programs, formatting and backing up media, accessing the internet).
  • You must be able to conduct word processing tasks such as creating, editing, saving, and retrieving documents.
  • You must be able to use a web browser to open web pages, download files, and search the internet.
  • You must be able to use an e-mail program to send and receive messages and to attach and download documents/files.
  • You must be able to download and install programs or plug-ins from the internet.

Getting Help With Canvas Courses

Canvas support is available 24/7 via chat or phone.

It is in your own best interest to be as specific as you possibly can. Try to include information such as the specific course page, quiz question, etc. you were on; what you attempted to do when that failed; the exact language of any error message displayed on your screen; the date and time when your problem occurred; and any other pertinent information (does the problem happen consistently and always in the same way, etc.).

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Accessibility Information

Netiquette

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Penn State Policies

Login Policy

Students are expected to log in regularly to keep up to date with announcements, discussions, etc. The class will progress at a regular pace throughout the semester and there are specific due dates and times for assignments, etc.

Course Availability

Your course will be available to you beginning the first day of class and will remain open for one year. After one year the course will close.

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According to Penn State policy G-9: Academic Integrity, an academic integrity violation is "an intentional, unintentional, or attempted violation of course or assessment policies to gain an academic advantage or to advantage or disadvantage another student academically." Unless your instructor tells you otherwise, you must complete all course work entirely on your own, using only sources that have been permitted by your instructor, and you may not assist other students with papers, quizzes, exams, or other assessments. If your instructor allows you to use ideas, images, or word phrases created by another person (e.g., from Course Hero or Chegg) or by generative technology, such as ChatGPT, you must identify their source. You may not submit false or fabricated information, use the same academic work for credit in multiple courses, or share instructional content. Students with questions about academic integrity should ask their instructor before submitting work.

Students facing allegations of academic misconduct may not drop/withdraw from the affected course unless they are cleared of wrongdoing (see G-9: Academic Integrity). Attempted drops will be prevented or reversed, and students will be expected to complete course work and meet course deadlines. Students who are found responsible for academic integrity violations face academic outcomes, which can be severe, and put themselves at jeopardy for other outcomes which may include ineligibility for Dean's List, pass/fail elections, and grade forgiveness. Students may also face consequences from their home/major program and/or The Schreyer Honors College.

You can learn more at The College of Agricultural Sciences Academic Integrity Information for Students.

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All course materials students receive or to which students have online access are protected by copyright laws. Students may use course materials and make copies for their own use as needed, but unauthorized distribution and/or uploading of materials without the instructor's express permission is strictly prohibited. University Policy AD40, Recording of Classroom Activities and Note-Taking Services, addresses this issue. Students who engage in the unauthorized distribution of copyrighted materials may be held in violation of the University's Code of Conduct, and/or liable under federal and state laws.

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In order to receive consideration for reasonable accommodations, you must contact the appropriate disability services office at the campus where you are officially enrolled, participate in an intake interview, and provide documentation. If the documentation supports your request for reasonable accommodations, your campus disability services office will provide you with an accommodation letter. Please share this letter with your instructors and discuss the accommodations with them as early in your courses as possible. You must follow this process for every semester that you request accommodations.

Accommodations for Military Personnel

Veterans and currently serving military personnel and/or spouses with unique circumstances (e.g., upcoming deployments, drill/duty requirements, disabilities, VA appointments, etc.) are welcome and encouraged to communicate these, in advance if possible, to the instructor in the case that special arrangements need to be made.

Use of Trade Names

Where trade names are used, no discrimination is intended and no endorsement by World Campus, Outreach and Cooperative Extension, the College of Agricultural Sciences, or The Pennsylvania State University is implied.

Subject to Change Statement

Please note that this Course Syllabus is subject to change. Students are responsible for abiding by such changes.

Course Availability

If you're ready to see when your courses will be offered, visit our public LionPATH course search to start planning ahead.

Course Availability

If you're ready to see when your courses will be offered, visit our public LionPATH course search to start planning ahead.