Silkworm caterpillar

The caterpillar of the unpaired silkworm (Limantria dispar) is one of the most common pests of forests and gardens, damaging more than 300 plants. It is distributed throughout the Palearctic. Caterpillars that develop into males molt 4 times, and those that develop into females molt 5 times. Caterpillars weave a silky cocoon before pupation.
The picture was taken in the Astrakhan region.
Author: VO

Unpaired silkworm-Ocneria dispar L. Distributed everywhere. Damages all hardwoods.

In unpaired silkworm butterflies, males are much smaller (about 45 mm), while females are larger — about 80 mm in wingspan). The forewings of the males are grey-brown, with dark transverse stripes and fringes in dark spots; the hindwings are brown with a dark edge and light fringe; the antennae are pinnate. In females, the wings are yellowish-white, with a mottled fringe and indistinct transverse stripes on the forewings; the antennae are saw-toothed. Eggs are round, smooth, gray or dark brown in color. The egg clutch is located on trunks, stumps, walls, rocks, and has up to 500 eggs covered with a layer of light yellow hairs that the female drops from the abdomen. Caterpillars are brownish-gray, with three narrow yellowish stripes along the back; on the sides of the first five segments there are two rows of large warts of blue color, on the rest — red, with tufts of long hairs; the head is yellowish with longitudinal black stripes. The length of adult caterpillars is up to 60 mm. Pupae are blackish-brown, with tufts of rusty yellow hairs at the end of the abdomen. Male pupae are much smaller, with pupae ranging in length from 18 to 37 mm. The formed caterpillars overwinter inside the eggs. They hatch in the spring, during budding. Along the trunk, they crawl into the crown and feed singly on buds, and then on leaves. Older caterpillars are particularly voracious. In about two months, the caterpillars finish developing and begin pupating. They pupate in a web-like cocoon between leaves and on the bark of trees. Females immediately lay the entire stock of eggs (about 500) in one clutch, which is placed on trunks, stumps, walls, rocks at a small height, up to half a meter from the ground surface. From above, they cover the egg clutch with a layer of light yellow hairs, which are dropped from the abdomen in the form of felt. Developing from autumn, the caterpillars remain in the eggs until spring.

Correction:
Ocneria (Lymantria) monacha Z. Silkworm-nun is a pest of pine and spruce forests, can also damage other coniferous (except juniper and yew) and hardwoods. It is distributed in the forest and forest-steppe zones of the European part of the USSR, in Western Siberia, in the forest-steppe of the southern regions of Siberia, in the Altai, in the Baikal region and in the Far East.
The caterpillar is different from the unpaired silkworm caterpillar. You really have an unpaired silkworm caterpillar in the photo.