Plant diseases

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

  How to diagnose diseases in plants
• What are plant pathogens mentioned in the video?

  Tobacco mosaic virus and Rose black spot
• What type of organism causes Rose black spot?

  A fungus
• How do insects affect plants according to the video?

  They extract nutrients, stunting growth
• Why are insects not considered pathogens?

  They do not cause infectious diseases
• What can insects carry that affects plants?

  Pathogens such as viruses
• What are some symptoms of plant diseases?

  Discoloration, stunted growth, decay
• How can we diagnose plant diseases?

  Using manuals, lab tests, or testing kits
• What is one method to identify plant diseases?

  Using a garden manual or website
• What is a second method to identify plant diseases?

  Taking the infected plant to a lab
• What is a third method to identify plant diseases?

  Using testing kits with monoclonal antibodies
• What are plant ion deficiency diseases?

  Diseases not caused by pathogens
• What ion deficiency causes stunted growth?

  A lack of nitrate ion
• Why is nitrate important for plants?

  It is needed for protein synthesis
• What ion deficiency causes chlorosis in plants?

  A lack of magnesium ion
• What is the role of magnesium in plants?

  It is required to make chlorophyll
• What happens to leaves when magnesium is deficient?

  They lose their green coloration
• What are the symptoms of plant diseases?

  • Discoloration of leaves
  • Stunted growth
  • Decay or rot
  • Malformed stems or leaves
• How can we diagnose plant diseases?

  1. Use a garden manual or website
  2. Take the infected plant to a lab
  3. Use testing kits with monoclonal antibodies