Posted: 09/09/2014 at 15:38
Over the last few years we have had crown galls on the acorns, leaf spangle gall on the leaves, and this year the leaves look like they have been blasted with a shot gun. From below, the leaves are peppered with holes. It still has plenty of acorns.
Oaks are host to more insects than any other native tree. The birds eat the insects , and a natural balance is obtained.
I would need one of those cherry picker things to even contemplate spraying the oaks. Its a total non starter. They were growing before my great grandad was born, and have survived everything the weather has thrown at them in 150years. I expect them to survive without my interference. Dead wood was taken out by a tree surgeon 2 years ago, he reckoned that they would need nothing doing in the next 20 years.
Heather look at Oak spangle gall. It produces discs on the leaves that then fall off.
We had a bad infestation one year. The next year nothing.