What four types of pathogen can cause communicable diseases in animals and plants?
Viruses, bacteria, protists and fungi.
AQA GCSE Combined Science: Trilogy (8464) — Biology — Foundation · 4.3.1.4
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What four types of pathogen can cause communicable diseases in animals and plants?
Viruses, bacteria, protists and fungi.
What is pathogen transmission?
The passage of a pathogen from an infected host or contaminated source to another host, where it can cause infection.
What determines the route by which a pathogen is transmitted?
The pathogen and the host.
What are three routes by which pathogens can be transmitted between hosts?
How can isolating infected hosts or removing infected plants reduce transmission?
It limits contact with susceptible hosts, reducing opportunities for infection.
What causes rose black spot?
A fungus.
What leaf symptoms are associated with rose black spot?
Purple or black spots develop; leaves often turn yellow and fall early.
Why does rose black spot reduce a plant’s growth?
Leaf damage and loss reduce photosynthesis, reducing growth.
How can rose black spot spread through the environment?
Through water or wind.
What are two ways to treat rose black spot?
Use fungicides and remove and destroy affected leaves.