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The pointed nail galls are caused by microscopic mites, which overwinter in the bark of lime trees and crawl on to the underside of the foliage in spring to feed. The mites secrete chemicals into the leaves causing them to produce the unusual

might try to revert to the original, all-green leaves.The only solution is to cut back any all-green growth to leave just the desired variegated foliage.any variegated plantall year roundCommon problems affecting plantsMagnesium deficiencyRustBlack spot

a recommended fungicide, containing either a Bordeaux mixture or copper, and spray before signs of infection and repeat at 10-15 day intervals.acersearly summerMore advice on growing acersPlanting an acer in a potAcer inspirationPlanting a small tree

Viburnum beetle was named as the number one pest by the RHS in 2010, stealing the crown from slugs and snails. It's native to the UK, but is becoming more widespread. Most of the leaf damage is caused by the stripey, beige-coloured larvae, though