Yellow Rodilegno

Yellow Rodilegno: Generalities

Moth of the Cossidae family, the yellow rodilegno it appears in adult form as a fairly large white butterfly, dotted with black (it is called a leopard butterfly).
The zeuzera larvae, at the initial stage, feed on the leaves of many fruit and ornamental plants; with the arrival of the first cold the rodilegno nest in the trunk and in the big branches, digging some real galleries, in which they remain for all the cold season; in spring they emerge from the trunks and in turn become butterflies.
The damage that these larvae can cause is enormous, both as regards the destruction of the leaves, and as regards the tunnels dug into the branches, which perish due to the diminished quantity of sap that runs through them, and may be subject to breakage due to the cavity that the larvae create within them.
The presence of the rodilegno on the vegetation is easily perceptible: the larvae at the first stage can be seen on the leaves and on the shoots, while the larvae in the trunks can be noted for a deterioration of the apical vegetation, but also for the excrements that come out of the galleries.
It is important to fight these insects when they are still outside the stems and branches, with suitable insecticides.
There are products to combat the larvae already nested in the wood, but their effectiveness is not always high, due to the difficulty of precise localization of the insects.