It is a species that spends the winter in the form of chrysalis. In spring, the adult moths emerge from the leaves fallen during autumn. A few days after conception, the females lay several dozen eggs that can take between 1 and 3 weeks to hatch. Then, the caterpillars are born. They will penetrate into the leaf and will not come out again.
It can sometimes be mistaken with the symptoms of leaf blotch of horse chestnut (Guignardia aesculi), a fungal disease that causes blotches on the leaves (Fig. c); not to be confused, since the mines of Cameraria only appear on the adaxis of the leaves and are protruding.
It can also be confused with blotches caused by physiological pathologies, such as heat stress (Fig. d). This pathology makes the edges of the leaves brown and dry. It is typical of specimens located in areas where summer is very extreme.
Carry out a treatment with plant endotherapy (ENDOterapia Vegetal®) in a preventive way to avoid the onset of problems; the treatment will be carried out when the first adults appear after coming out of winter diapause.
A curative treatment can also be carried out. However, damage caused will disappear at a slower pace.