Plant diseases

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

  How to diagnose diseases in plants
• What are plant ion deficiency diseases?

  Diseases not caused by pathogens
• What is an example of a viral plant disease?

  Tobacco mosaic virus
• What causes Rose black spot?

  A fungus
• What type of pathogens can attack plants?

  Bacterial pathogens
• How do aphids affect plants?

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

  They do not cause infectious diseases
• What are some symptoms of plant diseases?

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

  Using manuals, labs, or testing kits
• What is the role of nitrate ions in plants?

  Needed for protein synthesis and growth
• What condition does a lack of magnesium ions cause?

  Chlorosis
• Why is magnesium important for plants?

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

  They lose their green coloration
• What are the three ways to identify plant diseases?

  1. Use a garden manual or website
  2. Take the plant to a lab
  3. Use testing kits with antibodies
• What are the two examples of plant ion deficiency diseases?

  • Nitrate ion deficiency: causes stunted growth
  • Magnesium ion deficiency: causes chlorosis
• What should students focus on regarding plant diseases for exams?

  • Diagnosing plant diseases
  • Plant ion deficiency diseases