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3.3 Plant disease

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Question 13

A grower treats aphids on courgette plants with a pesticide. Why could this treatment also reduce the spread of a viral disease through the crop?

[1]
A

The pesticide would also kill the virus particles inside the cells of the infected plants

B

Fewer aphids would remove sugars, so plants could make more antibacterial chemicals to kill viruses

C

Fewer aphids would feed on the xylem, so less virus would be carried up the stem in water

D

Fewer aphids would carry the virus on their mouthparts from infected plants to healthy plants

Markscheme

3.3 Plant disease Questions

  1. GCSE
  2. /Biology
  3. /3.3 Plant disease

133 exam-style questions on AQA GCSE Biology 3.3 Plant disease, covering 3.3.1 Detection and identification of plant diseases and 3.3.2 Plant defence responses. Each one has a worked solution and a mark scheme showing where the marks go.

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