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Unknown decay on unknown tree!
I have 6 of these trees in my garden, at some point in the last month or so they have developed lots of dying leaves/holes/scorching/dust on the leaves.
Almost like a cross between something eating them and the sun scorching them. But it doesn't much up with ones which are in shade or not, so perhaps a bug or a disease ? Any suggestions would be much appreciated!









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The shrubs become weakened due to this, and you tend to see leaf drop and damaged looking leaves. You may need to look into giving them all a good watering. The soil may be dry and there may be roots from nearby plants taking over too.
Appreciate the comment about the heat at the moment, but this started before we had these mad heat waves. I shall up the watering nonetheless
Hence I thought maybe some sort of disease ! Or the neat round holes leading to some sort of bug, but I can't see any. Very odd!
They are also evergreens, which do get rid of their old dead leaves, that yellow and fall, usually around April time. They can also grow very big, hence need an awful lot of water - I think, like other posters, there's too many, too close together which would cause them to be stressed.
I don't think spraying your trees is going to help much I'm afraid. I once had a bay tree ball in a pot with that pest but was able to rub each leaf reverse with either white spirt or meths (can't quite remember, it was a long time ago!). A very finicky job. Trees would be impossible, you may just have to live with it.
As for watering, each tree might need a bucketful of water at least once or twice a week during hot weather, otherwise you could use a seep hose around the bases for a couple of hours.