AQA · Biology · 8461
GCSE Biology: Fungal diseases
Infection and response · AQA GCSE Biology (8461), specification point 4.3.1.4. Cards are generated from the exam board's own specification for "Fungal diseases", and every card links back to the page it came from. Specification © AQA — used with attribution.
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What type of pathogen causes rose black spot?
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A fungus.
What are the visible symptoms of rose black spot on leaves?
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Purple or black spots develop on the leaves, which often turn yellow and drop early.
Why does rose black spot reduce the growth of a plant?
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The damaged and lost leaves reduce photosynthesis, so the plant makes less glucose for growth.
By what two means is rose black spot spread in the environment?
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By water or wind.
What chemical treatment can be used against rose black spot?
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Fungicides.
Apart from fungicides, how can rose black spot be treated?
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By removing and destroying the affected leaves, which stops the fungal spores spreading.
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