
These come in a variety of colours : greenfly, blackfly, whitefly or gall aphid. They colonise plants and suck the sap from the stems , leaves and fruit.
The first indication of an infestation is the curling and distortion of leaves. The woolly aphid can be a serious problem on pine, larch and beech, manifesting itself as a white, fluffy, sticky mass.
The Gall aphid can result in development of galls on leaves.
In all cases the application of a systemic insecticide should be sufficient to deal with the problem.
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