Sycamore lace bug
The sycamore lace bug (Corythucha ciliata) eats only plane trees (known as sycamores in North America), primarily Platanus orientalis and P. hispanica in Europe and P. occidentalis in North America. C. ciliata feeds by penetrating the underside of the leaves. This bug is native to Southern Europe, mainly Italy, but has been spreading into Northern Europe since 1964.
The bug's life cycle consists of seven different stages of development: an egg stage, five nymph stages and an adult stage. The sycamore lace bug is white, with partially hardened wings that have a fine, lacy pattern. It lays its eggs on the underside of leaves, along the main veins of the leaf. This is where the larvae are found during the first three stages. In the last two, the bug spreads across the rest of the crop.
When the nymph and adult sycamore lace bugs feed on the leaves, they leave a black secretion along the underside of the leaf. These leaves then turn yellow and fall off prematurely.