plants

• What can cause diseases in plants?

  Pathogens and pests
• What is an example of a virus that affects plants?

  Tobacco Mosaic Virus (TMV)
• How does Tobacco Mosaic Virus (TMV) affect plants?

  It causes mosaic-like discoloration, reducing photosynthesis
• Which plants are commonly affected by TMV?

  Tomatoes and tobacco
• What is Rose Black Spot?

  A fungal disease that causes black spots on rose leaves
• What effect does Rose Black Spot have on plants?

  It limits photosynthesis and reduces growth
• What are the physical signs of plant disease?

  • Discoloration
  • Lesions
  • Stunted growth
  • Wilting
• What can chemical testing kits help diagnose in plants?

  Diseases
• What are some control methods for plant diseases?

  • Removing and destroying affected plants
  • Using fungicides
  • Practicing crop rotation
• What types of defenses have plants developed against pathogens and pests?

  • Physical defenses
  • Chemical defenses
  • Mechanical defenses
• What are examples of physical defenses in plants?

  Thick cell walls, waxy cuticles, and bark
• What do chemical defenses in plants involve?

  Production of antimicrobial chemicals to kill pathogens
• How do mechanical defenses deter herbivores?

  Through thorns, spines, and hairs
• What is a mechanical defense that some plants exhibit when touched?

  Leaves that curl or droop