Infectious diseases in plants

• What should you be able to describe by the end of the video?

  Causes and symptoms of infectious diseases
• What are the two infectious diseases in plants discussed?

  Tobacco mosaic virus and rose black spot
• Why is it important to learn about specific plant diseases?

  They could be asked in your exam
• What is another name for tobacco mosaic virus?

  TMV
• What type of infection is TMV?

  A widespread plant infection
• Which plant species can TMV infect?

  Multiple plant species including tomatoes
• What symptom does TMV cause in leaves?

  Discoloration in a mosaic pattern
• How does TMV affect photosynthesis?

  It reduces the rate of photosynthesis
• What is the effect of reduced photosynthesis on plant growth?

  It reduces the growth of the plant
• What is the second plant disease discussed?

  Rose black spot
• What causes rose black spot?

  A fungus
• What symptoms does rose black spot cause on leaves?

  Purple or black spots on leaves
• What happens to leaves affected by rose black spot?

  They often turn yellow and fall off
• How does rose black spot affect photosynthesis?

  It reduces the rate of photosynthesis
• What are the two ways to treat rose black spot?

  Spray with fungicides or remove infected leaves
• What are chemicals that kill fungi called?

  Fungicides
• What should you do with infected leaves of rose black spot?

  Remove and destroy them
• Where can you find more questions on infectious plant diseases?

  In the vision workbook
• What are the causes and symptoms of the two infectious diseases in plants?

  • Tobacco Mosaic Virus (TMV):
  • Cause: Viral infection
  • Symptoms: Mosaic pattern discoloration, reduced photosynthesis, reduced growth
  • Rose Black Spot:
  • Cause: Fungal infection
  • Symptoms: Purple/black spots, yellowing leaves, leaf drop, reduced photosynthesis, reduced growth
• How can you effectively manage rose black spot in plants?

  • Spray with fungicides
  • Remove and destroy infected leaves