State Size Features
Larva Up to 40 mm Initially it is greenish with a black head, turning a brownish gray color over time. The body is covered with whitish urticating hairs. On the back it has a row of reddish spots on which the urticating hairs are born, which are orange. The rest of the body is covered in whitish mushrooms.
Adult 30-50 mm (wing span) Brown colored body with anterior wings gray ash and darker venation, as well as 3 transverse stripes also dark. The hind wings are white with the gray border and a dark spot.
Adults appear in summer, flying from June to September. They reproduce and make the same day on the aciculas of the trees, forming a cylinder of eggs around the blade that the female protects by placing scales of her own body. Adults are difficult to find since they have a very short life (2-3 days).
The eggs hatch at 30 days and the larvae begin to feed on the shoots. They have gregarious character, forming pockets in the sunniest parts of the tree, to protect themselves from the winter cold, normally from the month of October. At the end of winter, and after passing through five larval stages, they descend from the trees in procession to bury themselves in the ground to a depth of up to 20 cm and pupate inside a silk cocoon.
Next summer will appear the new generation of adults from these pupae, completing the cycle. In exceptional cases, pupae can enter diapause, remaining in that state for a maximum of four years when the conditions are not adequate.