diseases in plants

• What is tobacco mosaic virus also known as?

  TMV
• What types of plants can be infected by TMV?

  A number of different plant species
• How does TMV affect the leaves of plants?

  Causes discoloration in a mosaic pattern
• What is the effect of TMV on photosynthesis?

  Reduces the rate of photosynthesis
• What is the consequence of reduced photosynthesis due to TMV?

  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?

  Develop purple or black spots
• What happens to leaves after developing spots from rose black spot?

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

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

  • Tobacco Mosaic Virus (TMV):
  • Cause: Viral infection
  • Symptoms: Mosaic pattern discoloration, reduced photosynthesis, reduced growth
  • Rose Black Spot:
  • Cause: Fungal infection
  • Symptoms: Purple or black spots on leaves, yellowing, leaf drop, reduced photosynthesis