Plant Diseases
Biology ⇒ Plant Biology
Plant Diseases starts at 7 and continues till grade 12.
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See sample questions for grade 11
Describe how environmental conditions can influence the development of plant diseases.
Describe the disease triangle and its components.
Describe the role of quarantine in plant disease management.
Describe two common symptoms of viral diseases in plants.
Explain the difference between a symptom and a sign in plant pathology.
Explain the importance of sanitation in preventing plant diseases.
Explain why chemical control of plant diseases should be used with caution.
Explain why monoculture can increase the risk of plant disease outbreaks.
Name one abiotic factor that can cause plant disease-like symptoms.
Name one example of a plant disease caused by a virus.
Name one example of a plant disease caused by bacteria.
Name one method by which nematodes cause damage to plants.
Name one way in which plant diseases can affect food security.
Name the three main types of pathogens that cause plant diseases.
Name the type of organism that causes rust diseases in plants.
A farmer notices that after several years of using the same fungicide, the effectiveness has decreased significantly. Explain the biological mechanism behind this phenomenon and suggest two strategies to prevent or delay it.
A research team is studying a new fungal disease in wheat. They observe that the disease only occurs when the temperature is above 25°C and humidity is high. Explain how this information can be used to develop a disease forecasting model.
Describe the difference between systemic and localized plant disease infections, providing an example of each.
Explain how horizontal (polygenic) resistance differs from vertical (monogenic) resistance in plants, and discuss the implications of each for long-term disease management.
Explain the concept of induced systemic resistance (ISR) in plants and how it differs from systemic acquired resistance (SAR).
