Managing Infectious Plant Diseases

Be able to define the following terms:

Plant disease =

Abiotic disease-causing agent =

Biotic (infectious) agent =

Pathogen =

Symptom (give some examples) =

Sign (give some examples) =

Describe the disease triangle.

Describe the stages of the fungal disease cycle.

 Distinguish between fungi, bacteria, phytoplasmas, viruses, and nematodes.

Describe the Major Principles of Disease Management & Methods of Control.

• Host resistance

• Eradication and therapy

• Avoidance

• Cultural practices

• Chemical applications (protection)

• Exclusion

What are some questions to answer prior to deciding to apply fungicides?

Give examples of each of the following:

Fungal disease

Bacterial disease

Viral disease

Nematode disease