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Plant pathology is the study of plants and their pathogens, the process of disease, and how plant health and disease are influenced by factors such as the weather, nonpathogenic microorganisms, and plant nutrition. It encompasses fundamental biology as well as applied agricultural sciences.

Plant pathology involves the study of plants and pathogens at the genetic, biochemical, physiological, cellular, population, and community levels, and how the knowledge derived is integrated and put into agricultural practice. Prerequisite to effective research, teaching, and extension in plant pathology is a breadth of interdisciplinary interest and knowledge, in a department and in its individual members, reaching from ecology to microbiology, from meteorology to applied mathematics, and from molecular biology to communication skills.

Learn through real-world, hands-on experiences

Plant Pathology students learn in many field and lab courses, including classes that focus on economics of plant disease, interactions between plants and people, fungi, organic agriculture, and global food security. They can also take part in a summer field course, numerous internships, and research opportunities.

Build community and networks

Plant pathology is a field that thrives in, and makes its greatest contribution to, comprehensive institutions like the University of Wisconsin–Madison where the proximity and complementarity of basic sciences and the other applied agricultural sciences are exceptionally strong. Please visit the department's Extension and Outreach overview page for additional details on the department's outreach activities, public education programs, and student organizations.

Customize a path of study

Undergraduates in Plant Pathology can choose between two tracks. The plant–microbe biology track has courses in basic math and sciences, including biology, chemistry, and physics, along with upper-level courses in plant pathology, biochemistry, and microbiology. This track is geared toward students who have an interest in receiving a broad education in the basic sciences or plan to pursue a graduate or professional degree.

The plant health and industry track includes some courses in basic math and sciences, as well as additional courses in agriculture and economics/management and upper-level courses in plant pathology, entomology, and other agricultural sciences. This track is designed for students who intend to work in industry after receiving their undergraduate degree.

Students are also able to explore double majors and a multitude of undergraduate certificates based on their unique educational and professional interests. More information about careers in plant pathology is available from the department.

Make a strong start

All first-year students in CALS participate in a CALS First-Year Seminar. These courses help new students understand academic programs, access student services, and develop time management and study skills. First-year students are also encouraged to participate in a First-Year Interest Group (FIG). Topics of interest to Plant Pathology students include global food security, plants and human well-being, and many other fascinating options. Students will discuss all of these options with advisors at orientation.

Gain global perspective

The Plant Pathology program is a great choice for students who wish to participate in a study abroad experience. Students can choose from a multitude of destinations worldwide and can travel abroad during summer, spring, or fall terms. Students can explore studying abroad as a Plant Pathology major by utilizing the Plant Pathology Major Advising Page. Students work with their advisor and the CALS study abroad office to identify appropriate programs.

How to Get in

Requirements Details
How to get in No application required. All students who meet the requirements listed below are eligible to declare. For information on how to declare, visit Advising & Careers.
Courses required to get in None
GPA requirements to get in None
Credits required to get in Must have fewer than 86 credits.
Other Students who do not meet the requirements above or are not in good academic standing should schedule a meeting with CALS Dean on Call (https://go.wisc.edu/g85h79) to discuss exceptions.

Prospective UW-Madison Students

All prospective UW–Madison students must apply through the Office of Admissions and Recruitment.

Students interested in this major should select it as the first choice major on their UW–Madison application. Admitted students who enroll at UW-Madison and attend Student Orientation, Advising, and Registration (SOAR) with the College of Agricultural and Life Sciences have the option to declare this major at SOAR.

 

University Requirements

All undergraduate students must complete both the following Core General Education (Core GenEd) and University Degree and Quality of Work requirements. The requirements below apply to students whose first term at UW-Madison or whose earliest post-high school college attendance at any institution is Summer 2026 or later. 

Students whose first term at UW-Madison or whose earliest post-high school college attendance at any institution occurred before Summer 2026 should refer to the archived Guide for the requirements that apply to them.

Core General Education (Core GenEd) Requirements

Civics & Perspectives 3 credits of Civics & Perspectives coursework.
Communication & Literacy 6 credits of Communication & Literacy coursework. This requirement may be partially satisfied by a qualifying placement test score. For more information see this tiny url: https://go.wisc.edu/qualifyingenglishplacement
Humanities & Arts 6 credits of Humanities & Arts coursework.
Mathematics & Quantitative Reasoning 6 credits of Mathematics & Quantitative Reasoning coursework. This requirement may be partially satisfied by a qualifying placement test score. For more information see this tiny url: https://go.wisc.edu/qualifyingmathplacement
Natural Science & Wellness Complete both:
  • 6 credits of Natural Science & Wellness or Natural Science & Wellness + Laboratory coursework.
  • one course must be in Natural Science & Wellness + Laboratory coursework.
Social & Behavioral Science 3 credits of Social & Behavioral Science coursework.
Total Credits 30 credits.

For more information see the policy.

University Degree and Quality of Work Requirements

All undergraduate degree recipients must complete the following minimum requirements. Requirements for some programs will exceed these requirements; see program requirements for additional information.

Total Degree 120 degree credits.
Residency Complete 30 credits in residence. A course is considered “in residence” if it is taken when in undergraduate degree-seeking status and:
  • is offered by UW-Madison and completed on the UW-Madison campus or at an approved off-site location, or
  • is offered by UW-Madison in an online or distance format, or is completed during participation in a UW-Madison study abroad/study away program.
Quality of Work Achieve at least the minimum grade point average specified by the school, college, and/or academic program.
Math Demonstrate minimal mathematics competence by:
English Language If required to take the UW-Madison English as a Second Language Assessment Test (MSN-ESLAT), demonstrate minimal English language competence by:
  • earning credit for ESL 118 at UW-Madison, or
  • achieving a qualifying MSN-ESLAT placement test score.
Language Complete one:
  • 2 high school units of a single language other than English, or
  • one course with the second semester Language designation.
Major Declaration Declare and complete the requirements for at least one major.

College of Agricultural and Life Sciences Requirements

CALS Graduation Requirements 

Cumulative Credits
  • Students must earn 120 degree credits.
  • Students declared in Biological Systems Engineering BS must earn 125 degree credits.
Quality of Work Students must maintain a minimum cumulative grade point average of 2.000 to remain in good standing and be eligible for graduation.
Residency Students must complete 30 degree credits in residence at UW–Madison after earning 86 credits toward their undergraduate degree.

In addition to the university's general requirements, all undergraduate students in CALS must satisfy a set of college and major requirements. Courses may not double count within university requirements, CALS college requirements, or major requirements.  A course may count toward university requirements and a college and/or a major requirement; similarly, a course counted toward college requirements may also be used to satisfy a university and/or a major requirement.

CALS College Requirements

CALS First-Year Seminar 1 credit. See the full list of eligible courses below or use this link: https://go.wisc.edu/calsfirstyearseminars
Ethnic Studies 3 credits with the Ethnic Studies designation.
Communication A Complete either:
  • 1 course with the Communication A designation, or
  • satisfaction of Communication A based on UW Placement Test.
Quantitative Reasoning A Complete either:
  • 1 course with the Quantitative Reasoning A designation, or
  • satisfaction of Quantitative Reasoning A based on UW Placement Test.
Introductory Chemistry Complete one:
CALS International Comparisons 3 credits. See the full list of eligible courses below or use this link: https://go.wisc.edu/calsinternationalcomparisons
Communication B 1 course with the Communication B designation.
Quantitative Reasoning B 1 course with the Quantitative Reasoning B designation.
Biological Science 5 credits with the Biological Science designation.
Additional Science 3 credits with the Biological, Physical, or Natural Science designations.
Science Breadth 3 credits with the Biological, Physical, Natural, or Social Science designations.
Humanities 6 credits with the Humanities or Literature designation.
Social Sciences 3 credits with the Social Sciences designation.
Capstone Learning Experience Each major articulates the required capstone learning experience.

CALS First-Year Seminars

AN SCI 135Grand Challenges and Career Opportunities in Animal and Dairy Sciences1
BIOCHEM 100Biochemistry First-Year Seminar1
COUN PSY 125The Wisconsin Experience Seminar1
F&W ECOL 101Orientation to Wildlife Ecology1
F&W ECOL 105Environment, Pollutants, and You3
GENETICS 155Freshman Seminar in Genetics1
INTEGSCI 100Exploring Biology2
INTEGSCI 140Exploring Service in STEM1
INTER-AG 155Issues in Agriculture, Environment, and Life Sciences1
LSC 155First-Year Seminar in Science Communication1
MICROBIO 150Microbiomes and Microbiology - First-Year Seminar1
PLANTSCI/​AGROECOL  100First-Year Seminar in Agroecology and Plant Science1
PL PATH 155Food Frontlines: Security, Sustainability, and Survival1
SOIL SCI 155First-year Seminar in Soil and Environmental Sciences1
Learning Community/Student Group Courses
The following learning community/student group courses are approved as CALS First-Year Seminars.
COUN PSY 117PEOPLE First Year Seminar1
INTEGSCI 110BioHouse Seminar: Biology for the 21st Century1
INTER-AG 117GreenHouse Roots Seminar1
INTER-AG 140CALS QuickStart: Foundations1
INTER-AG 175WISE Seminar1

CALS International Comparisons

The 3 credit requirement may be fulfilled as either a stand-alone 3 credit course or as a set of courses as listed below.
A A E/​ENVIR ST  244The Environment and the Global Economy4
A A E 319The International Agricultural Economy3
A A E/​NUTR SCI  350World Hunger and Malnutrition3
A A E 352Global Health: Economics, Natural Systems, and Policy (approved for enrollments Summer 2021 and later)4
A A E/​INTL ST  373Globalization, Poverty and Development3
A A E/​INTL ST  374The Growth and Development of Nations in the Global Economy3
A A E/​ECON  473Economic Growth and Development in Southeast Asia3
A A E/​ECON  474Economic Problems of Developing Areas3
A A E/​ECON/​INTL BUS  462Latin American Economic Development3
A A E/​ECON  477Agricultural and Economic Development in Africa3
AGROECOL 377Global Food Production and Health3
AN SCI/​DY SCI  370Livestock Production and Health in Agricultural Development3
ASIAN/​HISTORY/​POLI SCI  255Introduction to East Asian Civilizations (approved for enrollments Summer 2021 and later)3-4
C&E SOC/​SOC  341Labor in Global Food Systems (approved for enrollments Summer 2020 and later)3
C&E SOC/​ENVIR ST/​SOC  540Sociology of International Development, Environment, and Sustainability3
CSCS 500Global Health and Communities: From Research to Praxis3
DY SCI 471Food Production Systems and Sustainability3
ENTOM/​ENVIR ST  201Insects and Human Culture-a Survey Course in Entomology3
ENTOM/​ENVIR ST  205Our Planet, Our Health (approved for enrollments Fall 2026 and later)3
ENTOM/​ZOOLOGY  371Medical Entomology: Biology of Vector and Vector-borne Diseases3
F&W ECOL/​ENVIR ST  100Forests of the World (approved for enrollments Summer 2020 and later)3
F&W ECOL/​ENVIR ST/​ZOOLOGY  360Extinction of Species3
LSC 251Science, Media and Society (approved for enrollments Summer 2020 and later)3
PL PATH/​BOTANY  123Plants, Parasites, and People3
PL PATH 311Global Food Security3
PLANTSCI 370World Vegetable Crops3
The following study abroad courses fulfill the CALS International Comparisons requirement. Only the specific course numbers and titles listed, including Topics titles (in parentheses), are approved to meet the CALS International Comparisons requirement.
BIOCHEM 307Study Abroad: Introduction to Biological Sciences Research in Japan (approved for enrollments Fall 2026 and later)3
NUTR SCI/​INTER-AG  421Global Health Field Experience (UW Mobile Clinics and Health Care in Uganda)3
INTER-AG 321
INTER-AG/​NUTR SCI  421
Study Abroad Pre-Departure Seminar
and Global Health Field Experience (UW Global Health Community Health and Asset-Based Community Development in Sri Lanka)
3
INTER-AG 321
INTER-AG/​NUTR SCI  421
Study Abroad Pre-Departure Seminar
and Global Health Field Experience (UW Agriculture, Health and Nutrition in Uganda)
3
INTER-AG/​NUTR SCI  421Global Health Field Experience (UW Health, Education and Tanzanian Culture)3

Major Requirements

Courses may not double count within the major (unless specifically noted otherwise), but courses counted toward the major requirements may also be used to satisfy a university requirement and/or a college requirement. A minimum of 15 credits must be completed in the major that are not used to complete university or college requirements.

Core Mathematics
Complete one of the following (or may be satisfied by placement exam):5-6
College Algebra
and Trigonometry
Precalculus
Core Chemistry
Complete one of the following:5-9
General Chemistry I
and General Chemistry II
Advanced General Chemistry
Introductory Biology
Complete one of the following options:10
Option 1 (preferred):
Introductory Biology
and Introductory Biology
Option 2:
Animal Biology
and Animal Biology Laboratory
and General Botany
Option 3:
Evolution, Ecology, and Genetics
and Evolution, Ecology, and Genetics Laboratory
and Cellular Biology
and Cellular Biology Laboratory
Core Physics
Complete one of the following:4-5
General Physics
General Physics
General Physics
Plant Pathology Core
PL PATH 300Introduction to Plant Pathology4
PL PATH/BOTANY 332Fungi4
Another PL PATH course numbered 300 and above. Cannot include PL PATH 375, PL PATH 299, PL PATH 399, PL PATH 590, PL PATH 681, PL PATH 682, or PL PATH 699.3
Capstone
PL PATH 590Capstone in Plant Pathology3
Focus Areas
Complete one of the following:29-39
Plant-Microbe Biology Focus
Plant Health and Industry Focus
Total Credits67-83

Focus Areas

Plant–Microbe Biology Focus

Additional Mathematics and Statistics
Complete one of the following:5
Survey of Calculus 1
Calculus and Analytic Geometry 1
Complete one of the following:3-4
Calculus and Analytic Geometry 2
Introduction to Statistical Methods
Introductory Applied Statistics for the Life Sciences
Additional Chemistry
Complete one of the following options:4-8
Organic Chemistry I
and Introductory Organic Chemistry Laboratory
and Organic Chemistry II
Elementary Organic Chemistry
and Elementary Organic Chemistry Laboratory
Biology
Complete one of the following options:5-8
Option 1:
Biology of Microorganisms
and Biology of Microorganisms Laboratory
Principles of Genetics
Option 2:
Complete two of the following:
Principles of Physiology
Principles of Physiology Laboratory
Biological Interactions
Additional Physics
Complete one of the following:4-5
General Physics
General Physics
General Physics
Plant Physiology
BOTANY 500Plant Physiology3-4
Plant-Microbe Electives
Complete 5 credits from the following:5
Introduction to Biochemistry
Plant Anatomy
Plant Systematics
Vascular Flora of Wisconsin
General Ecology
Introduction to Entomology
Any PL PATH course numbered 300 and above
Total Credits29-39

Plant Health and Industry Focus

Biology
GENETICS 466Principles of Genetics3
Core
PL PATH 559Diseases of Economic Plants3-4
or BOTANY 500 Plant Physiology
Plant Health and Industry Electives
Complete 24 credits from at least two different subject listings from the following:24
Introductory Ecology
Plant Anatomy
The Vegetation of Wisconsin
BOTANY/​ZOOLOGY  460General Ecology4
Plant Physiology
Introduction to Biochemistry
Introduction to Community and Environmental Sociology
Food, Culture, and Society
Poverty and Place
Sociology of Agriculture
Insects and Human Culture-a Survey Course in Entomology
Introduction to Entomology
Forests of the World
Extinction of Species
Forest Ecology
General Microbiology
General Microbiology Laboratory
Biology of Microorganisms
Biology of Microorganisms Laboratory
Nutrition Today
Comparative Animal Nutrition
Human Nutritional Needs
World Hunger and Malnutrition
Nutritional Biochemistry and Metabolism
Community Nutrition and Health Equity
Introduction to Plant Science and Technology
Sustainable Turfgrass Use and Management
Woody Landscape Plant Identification, Culture, and Use
Cropping Systems
Forage Management and Utilization
Environment of Cultivated Plants
Water and People
Soil: Ecosystem and Resource
General Soil Science
Soils and Environmental Quality
Plant Nutrition Management
Any PL PATH course numbered 300 and above not already taken for another category
Human/Animal Relationships: Biological and Philosophical Issues
Business
Complete 6 credits from the following:6
Introductory Financial Accounting
Introductory Managerial Accounting
Accounting Principles
Financial Reporting I
Financial Reporting II
Taxation: Concepts for Business and Personal Planning
Agricultural Systems Management
Introduction to Agricultural and Applied Economics
Commodity Markets
Cooperatives and Alternative Forms of Enterprise Ownership
Agricultural Finance
Economic Decision Analysis
Economic Problems of Developing Areas
Principles of Microeconomics
Principles of Macroeconomics
Marketing Communication for the Sciences
Managing Organizations
Human Resource Management
Total Credits40-41

Learning Outcomes

  1. Define and explain major concepts in the biological sciences including Plant Pathology.
  2. Appropriately use biological instrumentation and laboratory techniques.
  3. Explain and apply the scientific method including designing and conducting experiments and testing hypotheses.
  4. Recognize the relationship between structure and function at all levels: molecular, cellular, organismal, and ecological.
  5. Demonstrate a style appropriate for communicating scientific results in written and oral form.
  6. Integrate math, physical sciences, and technology to answer biological questions using the scientific method.

Four-Year Plan

This Sample Four-Year Plan is a tool to assist students and their advisor(s). Students should use it—along with their DARS report, the Degree Planner, and Course Search & Enroll tools—to make their own four-year plan based on their placement scores, credit for transferred courses and approved examinations, and individual interests.

Students must complete at least 120 total credits to be eligible for graduation.

Sample Plant Pathology Four-Year Plan—Plant-Microbe Biology Focus Area

First Year
FallCreditsSpringCredits
CHEM 1034CHEM 1045
MATH 2215General Education3
First Year Seminar1MATH 2224
General Education or Elective3Electives3
 13 15
Second Year
FallCreditsSpringCredits
CHEM 3433ZOOLOGY/​BIOLOGY/​BOTANY  1525
ZOOLOGY/​BIOLOGY/​BOTANY  1515CHEM 3442
General Education6CHEM 3453
 General Education3
 14 13
Third Year
FallCreditsSpringCredits
PL PATH 3004PHYSICS 1044
PHYSICS 1034PL PATH/​BOTANY  3324
Electives6GENETICS 4663
CALS International Comparisons Course3Electives6
 17 17
Fourth Year
FallCreditsSpringCredits
MICROBIO 3033BOTANY 5003
MICROBIO 3042PL PATH 5903
Plant Pathology Core Elective3Plant Microbe Electives5
Electives6Electives6
 14 17
Total Credits 120

Sample Plant Pathology Four-Year Plan—Plant-Health and Industry Focus Area

First Year
FallCreditsSpringCredits
BIOLOGY/​BOTANY/​ZOOLOGY  1515MATH 1133
MATH 1123BIOLOGY/​BOTANY/​ZOOLOGY  1525
First Year Seminar1General Education3
General Education3Electives3-4
Elective3 
 15 15
Second Year
FallCreditsSpringCredits
CHEM 1034CHEM 1045
General Education6General Education3
Plant Health and Industry Elective3-5BOTANY 5003
 Business Course3-4
 15 15
Third Year
FallCreditsSpringCredits
PL PATH 3004PL PATH/​BOTANY  3324
PHYSICS 1034GENETICS 4663
Elective1Electives2
Plant Health and Industry Elective3Plant Health and Industry Elective6
CALS International Comparisons Course3 
 15 15
Fourth Year
FallCreditsSpringCredits
Plant Health and Industry Electives6PL PATH 5903
Electives6Plant Health and Industry Electives6
Business Course3Electives6
 15 15
Total Credits 120

Advising and Careers

Advising 

Students in plant pathology are assigned to a professional staff advisor who helps guide them throughout their undergraduate career. Academic advisors can address questions and concerns, provide advice, help create a four-year degree plan that meets academic and professional goals, and connect students to resources. Students in Plant Pathology are also assigned a faculty mentor when they declare the major. The faculty mentor helps students dive deeper into the field of plant pathology and learn about research, graduate school, and careers in the field.

Career Opportunities

Please visit our Internship & Job Resources page for information on career opportunities available to plant pathology students.

Plant Pathologists from all educational levels are able to seek employment in a variety of areas. Some examples include:

  • colleges and universities
  • biotechnology companies
  • state and federal agencies
  • international agricultural research centers
  • nurseries, greenhouses, and garden centers
  • non-governmental organizations
  • golf courses, public parks, and landscape maintenance companies
  • diagnostic laboratories
  • seed, plant production, and tissue culture companies
  • a variety of private consulting firms

If you would like to know more about what is Plant Pathology and how an undergraduate education in Plant Pathology can help you make an impact on the world around you, please check out the “Plant Pathology: taking you further than you ever imagined” video from the American Phytopathological Society.

Career Advising

Students are encouraged to begin the career exploration process early in their UW–Madison journey by working with advisors, faculty, and CALS Career Services. These resources can help students reflect on their values, identify career goals, and outline strategies to achieve them. CALS Career Services advisors can help students one-on-one with their career goals, resume and cover letter help, interview prep, and more.

Wisconsin Experience

Undergraduates majoring in plant pathology at UW–Madison will find an inclusive, welcoming community where professors know their students and are able to provide guidance based on students’ specific academic and career goals. There are numerous opportunities to conduct research with internationally prominent faculty and to take part in the Wisconsin Idea, whereby faculty and students extend the knowledge developed at the university to stakeholders in Wisconsin and beyond for the betterment of society.

Internships

Plant Pathology offers paid research internships during summer term, as well as paid or credit-earning research opportunities year-round. Undergraduates get a firsthand view of how research is conducted and what it means to be a professional scientist. For more information on internship opportunities available to plant pathology students, please visit our Internship & Job Resources page.

Research Experience

Nearly all Plant Pathology undergraduates participate in field- or lab-based research with a professor. Research in the department has a long tradition of supporting grower needs. Many faculty are using the plethora of research tools available, including molecular biology and systematics, to answer questions that are directly applicable to grower groups. Please visit the department's Research page for additional details on research activities in Plant Pathology.

Student Organizations

By joining the Plant Pathology Undergraduate Club, majors get to know their fellow students outside the classroom. The department provides resources for students to meet experts who lead discussions on a range of topics including cutting-edge research and technology, career options, and how to apply and compete for jobs.

Undergraduate students are also welcome to join What's Eating My Plants (WEMP). This organization, founded in 2010 by Plant Pathology graduate students, is dedicated to bridging the gap between the University and the greater Madison community. The students visit Family Science Nights at schools, community centers, and Saturday Science at the Wisconsin Institute for Discovery (WID) throughout the year.

Global Engagement

Plant Pathology students interested in studying issues on a global scale are encouraged to enroll in Plant Path 311: Global Food Security, which explores drivers of food insecurity: barriers to food production (pests, land availability, climate), barriers to food availability (politics, price, biofuels), and a greater need due to population growth. The Plant Pathology program is an excellent choice for students wishing to participate in a study abroad experience. Students can find more information about study abroad on the CALS study abroad advising page.

Community Engagement and Volunteering

The UW–Madison Division of Extension provides statewide access to the resources and research of the University of Wisconsin, other universities, and the United States Department of Agriculture so that the people of Wisconsin can learn, grow, and succeed at all stages of life.  The UW–Madison Division of Extension carries out the tradition of the Wisconsin Idea – extending the boundaries of the university to the boundaries of the state. UW–Madison Extension and outreach activities support educational programs for farmers, businesses, communities, families, and youth. More details can be found on the department Extension & Outreach page.

On campus, the Morgridge Center for Public Service provides resources to help students connect with volunteer opportunities based on their interests and goals.

Resources and Scholarships

Department scholarships are available to Plant Pathology students and fellowships are available to support research work with a professor. Students across the College of Agricultural and Life Sciences receive more than $1.25 million in scholarships annually. Learn more about college scholarships here.