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Questions and Answers
What does the term 'localized disease' refer to?
What does the term 'localized disease' refer to?
- Affecting the entire plant systemically
- Affecting only a part of the plant (correct)
- Affecting multiple plants in the vicinity
- Causing discoloration of leaves
How can plant diseases be classified based on their occurrence?
How can plant diseases be classified based on their occurrence?
- Seasonal and non-seasonal diseases
- Endemic and epidemic diseases (correct)
- Infectious and non-infectious diseases
- Indigenous and exotic diseases
What does the term 'endemic' mean in the context of plant diseases?
What does the term 'endemic' mean in the context of plant diseases?
- Occurring unpredictably in various regions
- 'End-of-season' diseases affecting plants
- Prevalent in, and confined to, a particular country or district (correct)
- 'Jungle-specific' in terms of plant habitat
How are plant diseases classified based on the host plant?
How are plant diseases classified based on the host plant?
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How can plant diseases be classified based on the plant part affected?
How can plant diseases be classified based on the plant part affected?
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Which term refers to a plant disease based on symptoms such as rusts, smuts, wilts, and blights?
Which term refers to a plant disease based on symptoms such as rusts, smuts, wilts, and blights?
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What is an example of a classification of plant diseases based on the host plant?
What is an example of a classification of plant diseases based on the host plant?
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Study Notes
Localized Disease
- Refers to a disease confined to a specific area or part of the plant.
Classification by Occurrence
- Endemic: A disease that is constantly present in a particular region or population.
- Epidemic: A disease that spreads rapidly and affects a large number of plants in a short period.
- Pandemic: A disease that spreads worldwide.
Endemic Disease
- A disease that is constantly present in a specific region or population.
Classification by Host Plant
- Monocyclic: Diseases that infect only one host plant species during their life cycle.
- Polycyclic: Diseases that can infect multiple host plant species during their life cycle.
Classification by Plant Part Affected
- Root diseases: Diseases that affect the roots of plants
- Stem diseases: Diseases that affect the stems of plants
- Leaf diseases: Diseases that affect the leaves of plants
- Fruit diseases: Diseases that affect the fruits of plants
Classification by Symptoms
- Rusts: Diseases characterized by reddish-brown pustules on the plant surface.
- Smuts: Diseases characterized by black, dusty spores on the plant surface.
- Wilts: Diseases that cause the plant to wilt and lose its turgor.
- Blights: Diseases that cause rapid death and decay of plant parts.
Example of Classification by Host Plant
- Citrus greening disease: Affects citrus trees.
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