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Pest/insect covering tree
 

Pest/insect covering tree

Hi, A tree (elderberry) in our garden is covered in an insect. It a old/mature tree and all the new growth has insects covering the stems of the leaves (see photos attached). Some of the older leaves are covered in small flies. Is this harmful to the tree and what action should we take? I am a complete garden novice. ClaireLarkfield, , Co Dublin Posted: 28/05/2017

It is an attack by greenfly. Predators and parasites are likely to arrive and attack the greenflies. The tree is vigorous enough to withstand the attack and will recover, even if it might look a bit shabby.

 

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