Plant Disease Management

Start Date
End Date
Gardening with nature requires knowledge of the various pathogenic fungi, bacteria, and viruses that affect native plants and the environmental conditions that lead to infection. Become your own plant health detective and learn the signs and symptoms of the most common plant diseases in our landscapes. Study disease life cycles and discuss management strategies for prevention and control, then implement them in your garden.

Day 1 (3.75 PDHs)
9:45 – 10:00 am: Registration
10:00 – 11:00 am: What is a disease?
•Disease triangle
•Biotic and abiotic
Signs and Symptoms
Diseases caused by fungi and their control
•Leaf spots
•Powdery mildew
11:00 – 11:10 am: Break. Students can study samples, including use of microscope.
11:10 – 12:00 pm: Diseases caused by fungi (continued)
12:00 – 12:30 pm: Lunch break
12:30 – 1:30 pm: Root rots and wilts
1:30 – 2:30 pm: Scout outside for plant diseases

Day 2 (3.75 PDHs)
9:45 – 10:00 am: Check in, look at samples
10:00 – 11:00 am: Diseases caused by bacteria, viruses, nematodes and their control
11:00 – 11:15 am: Break. Students can study samples, including use of microscope.
11:15 – 11:45 am: Prevention & Control
•Cultural practices
•Disease resistant cultivars
•IPM strategies
•Wrong plant, Wrong place
•Improve management strategies - compost tea
12:00 – 12:30 pm: Lunch break
12:30 – 1:25 pm: Prevention & Control (cont.)
1:25 – 2:20 pm: Activity or Scout outside for plant diseases
2:20 – 2:30 pm: Q & A. Class evaluations, plant giveaways.
Hockessin, DE
Distance Learning
Course Equivalency
Horticulture / Plants
Health, Safety and Welfare
Learning Outcomes
1. Know why plant diseases are important.
2. Understand the difference between a sign and symptom of plant disease.
3. Know the basic causal agents of plant diseases and the disease triangle.
4. Understand the impact of cultural practices on plant diseases.
5. Understand the basic elements of plant disease prevention and control.
Bob Mulrooney
Website Registration
Course Codes
Mt. Cuba Center

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