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WorksheetsHorse Chestnut Leaf Miner (Cameraria ohridella)
Total questions: 15
Worksheet time: 8mins
What does the Horse Chestnut Leaf Miner caterpillar do to the leaves?
It forms leaf mines by feeding inside the leaves
It makes flowers grow bigger
It eats the tree bark
It turns leaves into seeds
Which colors do leaf mines turn as the season goes on?
Blue and purple
First white, then brown/orange
Black only
Green only
What can happen to heavily infested horse chestnut leaves in autumn?
They grow new leaves quickly
They dry up, turn brown, and drop early
They become bright pink
They turn into fruit
Which action helps reduce the pest build-up on isolated trees?
Watering the leaves every day
Burying or burning fallen infested leaves in autumn
Painting the trunk white
Adding more fertilizer
Which statement about the Horse Chestnut Leaf Miner is true?
It has a big effect on the tree’s growth rate and health
Research shows it has little effect on growth rate or health
It only lives in one park
It grows on the tree bark
If you suspect the leaf miner on a horse chestnut, who encourages reporting the pest?
The local bakery
The Forestry Commission via TreeAlert
The school library
The fire department
Which picture feature would help you identify leaf miner damage on a horse chestnut leaf?
Bright green smooth leaves with no marks
Leaves with blotchy white then brown/orange patches
Tree roots sticking out of the ground
Large holes in the trunk
What does the word canker mean on a horse chestnut tree?
A crack in the bark that oozes fluid
A leaf turning green
A flower blooming
A bird nest
Which colors can the fluid from a bleeding canker be?
Black, brown, or orange
Blue and purple
Pink and yellow
White only
Where can cankers appear on a horse chestnut tree?
On the trunk or branches
Only on the roots
Only on the leaves
Only on the flowers
What should people do if they see signs of bleeding canker?
Report the sighting via TreeAlert
Ignore it
Water the tree every day
Pick off all the leaves
Can trees with bleeding canker recover?
Yes, trees can recover so removal is usually not needed
No, trees never recover
Only very old trees recover
Trees recover only if the leaves are burned
What can be done with infected branches to slow disease spread?
Remove and incinerate them on site
Paint them blue
Wrap them in plastic
Bury the whole tree
Which tool should you use to report tree pests or diseases you spot?
TreeAlert
WeatherAlert
TrafficAlert
FireAlert
What should you do with boots and equipment to prevent spreading pests and diseases?
Clean them before and after site visits
Leave them dirty so animals can smell them
Paint them bright colors
Hide them under leaves
