What have your tree health survey results revealed?

Analysis of the early results you have sent in for the OPAL tree health survey has already revealed some interesting trends.

Although the results have not yet been verified, early indications are that most trees are pest and disease-free – but one particular species is more likely to be affected.

Horse Chestnut scaleOf the trees surveyed so far, Horse Chestnuts most often displayed symptoms of pests and diseases; about 65% reportedly had leaf blotch, Leaf-miner, bleeding canker or scale.

Oak is currently the most popular tree to survey, with Oak mildew the disease most commonly reported on this species. Ash is the second most popular, and 9% of those surveyed were believed to have Ash decline.

Where the density of the crown was recorded, about two-thirds of the trees had crowns that were at least 75% full. And although half of trees surveyed had deadwood, most had only a small amount, suggesting that it was more likely to be part of the tree’s natural lifecycle.

We’ve also discovered that you’re a sociable bunch; about a quarter of surveys so far have been done with friends or family, and more than half were done in school.

But the results did show that the vast majority of surveys were carried out in England and we now need more people in Scotland and Wales to get involved in the tree health survey – the first OPAL has run outside England. You can download or request packs in English or Welsh.

Want to find out about the health of trees in your neighbourhood? Get involved in the survey and send us your results – whatever you find – to help us build a map of tree health across Britain.