Choose exam board for KS4 Computer Science (GCSE)
Choose exam board for KS4 English
Choose exam board for KS4 French
Choose exam board for KS4 Geography
Choose exam board for KS4 German
Choose exam board for KS4 History
Choose tier for KS4 Maths
Choose exam board for KS4 Music
Choose exam board for KS4 Physical education (GCSE)
Choose exam board for KS4 Religious education (GCSE)
Choose exam board for KS4 Spanish

      Plant diseases: TMV, crown gall disease and Chalara ash dieback

      Lesson details

      Learning outcome

      I can describe examples of common diseases in plants, how they spread, and ways to reduce the spread.

      Key learning points

      1. Tobacco mosaic virus is an example of a disease in plants caused by a virus.
      2. Crown gall disease is an example of a disease in plants caused by a bacterium.
      3. Chalara ash dieback is an example of a disease in plants caused by a fungus.
      4. Ways in which plant diseases can be spread, and ways in which the spread can be reduced.
      5. Impacts of plant diseases, including on biodiversity and human food security.

      Keywords

      • Virus - A non-living infectious agent that replicates inside a host cell.

      • Fungus - A eukaryotic, spore-producing organism that feeds on organic matter.

      • Food security - A measure of the quantity and quality of food available to support households and whole communities.

      • Biodiversity - Variety of living organisms within an ecosystem.

      Common misconception

      Only human and other animals can catch diseases. Plant diseases are not important.

      This lesson explores examples of plant diseases, the pathogens that cause them and how they are spread, and their devastating impacts.

      Teacher tip

      Symptoms of plant diseases will be visible in many local plants all year round.

      Content guidance

      Depiction or discussion of sensitive content

      Depiction or discussion of violence or suffering

      Supervision

      Adult supervision required

      Licence

      This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

      Loading...

      Prior knowledge starter quiz

      6 Questions

      Q1.
      Which cell is from a plant?

      A cell with a nucleus, but without a cell wall.
      Correct answer: A cell with a nucleus and a cell wall.
      A cell with no nucleus, which stores its DNA in the cytoplasm.

      Q2.
      A calcium deficiency can cause which disease in humans?

      anaemia
      scurvy
      Correct answer: rickets

      Q3.
      Water and minerals enter a plant through its ...

      Correct Answer: roots, root, roots., root.

      Q4.
      Which plant organelle carries out photosynthesis?

      An image in a quiz
      Correct Answer: chloroplast, chloroplasts

      Q5.
      What are the products of photosynthesis?

      carbon dioxide
      Correct answer: glucose
      Correct answer: oxygen
      water
      nitrogen

      Q6.
      Match the human disease to the type of pathogen.

      Correct Answer:athlete's foot,fungus

      fungus

      Correct Answer:malaria,protist

      protist

      Correct Answer:gonorrhoea,bacteria

      bacteria

      Correct Answer:measles,virus

      virus

      6 Questions

      Q1.
      A microorganism that causes disease is called a ...

      gamete.
      particle.
      Correct answer: pathogen.
      plant.
      symptom.

      Q2.
      Which of the following are examples of microorganisms that can cause disease?

      ash
      Correct answer: bacteria
      barley
      Correct answer: fungi
      Correct answer: virus

      Q3.
      What are the symptoms of tobacco mosaic virus (TMV)?

      growth of a tumour
      Correct answer: discoloured leaves
      discoloured stem
      Correct answer: leaves that curl up

      Q4.
      How is crown gall spread?

      Correct answer: contaminated soil
      water splashes
      wind
      Correct answer: contaminated garden tools

      Q5.
      is the variety of living organisms in an ecosystem.

      Correct Answer: biodiversity

      Q6.
      Who gives the best description of food security?

      Jun: Food security means you can buy everything you need from the supermarket.
      Correct answer: Sam: It's the quality and quantity of food available to everyone in a community.
      Izzy: Food security means most people can afford to buy enough food.

      To help you plan your 10 biology lesson on: Plant diseases: TMV, crown gall disease and Chalara ash dieback, download all teaching resources for free and adapt to suit your pupils' needs...