Infection & ResponseHigh Exam FrequencyAQAEdexcelOCRWJEC

Plant Diseases and Defenses

Plant pathogens, defense mechanisms, disease identification, crop protection

What you'll cover

  • Plant pathogen types and symptoms
  • Rose black spot fungal disease
  • Tobacco mosaic virus effects
  • Plant defense mechanisms: waxy cuticles, cell walls
  • Chemical defenses: antibacterial compounds
  • Disease identification and field studies
  • Crop protection and agricultural impact

Sample Flashcards

What is rose black spot?
A fungal disease that affects roses, causing black or purple spots on leaves, which turn yellow and drop off, reducing photosynthesis.
What is a plant pathogen?
A microorganism that causes disease in plants, such as fungi, bacteria, or viruses.

Sample Questions

What type of pathogen causes rose black spot disease?

  • A. Fungus
  • B. Virus
  • C. Bacterium
  • D. Protist
1 markfoundation

Explain how rose black spot affects the growth of infected plants.

2 marksstandard

18

exam-style questions

20

revision flashcards

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