Flashcards · Biology · Communicable Diseases
Fungal and Protist Diseases
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What causes rose black spot?
A fungus.
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What are the symptoms of rose black spot?
Purple or black spots on the leaves, which often turn yellow and drop early.
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Why does rose black spot affect growth?
The damaged leaves photosynthesise less.
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How is rose black spot spread?
By water and by wind.
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How can rose black spot be treated?
With fungicides, and by removing and destroying the affected leaves.
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What type of pathogen causes malaria?
A protist.
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What are the symptoms of malaria?
Recurrent episodes of fever. It can be fatal.
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What is the vector for malaria?
The mosquito.
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How does a mosquito pass on malaria?
It takes up protists when it bites an infected person and passes them on when it bites someone else.
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How can the spread of malaria be controlled?
Prevent mosquitoes breeding, and use mosquito nets.
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Where do mosquitoes breed?
In standing water.
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Why are nets useful?
They stop people being bitten.
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Does the mosquito get malaria?
No. It only carries the protist.
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Which of these affects plants, rose black spot or malaria?
Rose black spot.
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What is a fungicide?
A chemical that kills fungi.
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Name the part marked X and say what it does in spreading malaria. The mosquito. It is the vector that carries the protist from an infected person to a healthy person.
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Describe each step in the spread of malaria. 
An infected person. A mosquito bites and takes up the protists. The mosquito, the vector, carries them. It bites a new person and passes them on. Nets and draining breeding sites control it.