Archive | June, 2011


25 Jun
Today is the day, good luck with the survey.
Here is the link to the survey page. If anyone is having trouble accessing it here are the questions from the survey so feel free to send the results as a comment on this blog and I will enter them manually. Thank you all for your help and support.
  1. How many mines are there on the first leaflet?
  2. How many mines are there on the second leaflet?
  3. How many mines are there on the third leaflet?
  4. How many mines are there on the fourth leaflet?
  5. How many mines are there on the fifth leaflet?
  6. How many mines are there on the sixth leaflet?
  7. How many mines are there on the seventh leaflet?
  8. How many mines are there on the eighth leaflet?
  9. How many mines are there on the ninth leaflet?
  10. How many mines are there on the tenth leaflet?
  11. Geographic location of the tree (This could be a post code, map reference, GPS location etc.)
  12. Where was the tree found?
  13. Was there any debris under the tree from last years dead leaves?
  14. How many other Horse-chestnut trees were there within 100 paces of the tree you looked at?

See below for more details and helpful photos.


Horse-Chestnut Leaf-Miner INVADES Britain

22 Jun

The hunt is fast approaching with only a few days left before the big day on the 25th.

Fungal disease




On the left is a photo of fungal disease to help distinguish it from the damage caused by theĀ  leaf-miners (shown below).

Horse-Chestnut Leaf-Miner INVADES Britain

6 Jun

The Horse-Chestnut Leaf-Miner (Camararia ohridella) is invading Britain and I need your help. This tiny moth lays its eggs on the Horse-Chestnut leaf and the caterpillar eats the leaf from the inside.

I am looking into the geographic distribution of this moth as a part of my MSc research project.

I need everyone reading this in the UK to go out on Saturday the 25th June 2011 and look at their nearest White-flowering Horse-Chestnut tree (the most commonly found).

Take a look at one of the middle ‘fingers’ (leaflets) of 10 individual Horse-Chestnut leaves and count the ‘mines’, these will look like little brown circles or lines (shown below). When held up to the light they are easier to see. IF THERE ARE NO MINES PLEASE ALSO LET ME KNOW AS THIS IS ALSO IMPORTANT.

Horse-Chestnut leaf

Single 'finger' (leaflet)

Single larger mine



















Please record this number (10 leaflets from every tree you find) and send them to me with the location (post code, or map reference) of the tree.

Please enter your results in to the online survey found at:

THANK YOU FOR YOUR HELP and happy hunting.