Principle of plant disease control (PPD)
- Immunization
- Prophylaxis (Preventive)
- Protection
- Eradication
- Exclusion
Types of reproduction
a) Oospore: Pythium, Phytophthora, Sclerospora, etc.
b) Chlamydospore: Fusarium
c) Sclerotia: Rhizoctonia , Sclerotium.
Note: MLO’s are phloem inhabitants: transmitted mostly by leaf hoppers.