Silkworms are dangerous garden pests, in some years capable of destroying tree leaves on a large area of plantings, from which plants are very behind in growth. An outbreak requires urgent action in the form of insecticidal treatments.
Unpaired Silkworm (Lymantria Dispar L.)
Synonyms: Phalaena dispar L., Ocneria dispar L., Porthetria dispar L.
Widely distributed in the temperate zone of Europe. Damages various woody plants. Large butterfly, female wingspan up to 8 cm, males up to 5 cm. Winters in the form of eggs on the surface of tree bark, more often on boles, also on dry wood. Clutches are made in the form of pads up to 3 cm in diameter, covered with hairs. Each clutch contains up to 600 eggs. In the spring, while the buds open, caterpillars with long hairs emerge from the eggs, with the help of which they are carried by the wind. By June, the caterpillars increase in size and reach 7 cm in length. Caterpillars are covered with warts with tufts of hair sticking out of them. Each caterpillar destroys up to 30 or more leaves during feeding. In June, caterpillars pupate in cocoons attached to tree bark, branches, leaves. After 15-20 days, butterflies come out. females are fertile, lay up to 1200 eggs.
Before flowering, trees are sprayed with insecticidal preparations against gnawing pests. In the autumn, trees are inspected and clutches are destroyed, scraping them from the surface of the bark.
Ringworm (Malacosoma Neustria L.)
Widely distributed in the territory of ETR. Damages various deciduous trees. The moth is medium-sized, with a wingspan of up to 4 cm, tan. Winters in the form of formed caterpillars inside the eggs, located on thin shoots in clutches in the form of rings. Each clutch contains from 100 to 400 eggs. Caterpillars emerge from the eggs before flowering apple trees, begin to actively eat at night, damaging the buds and leaves. They live in colonies, weaving spider web nests in the forks of branches, they hide in them during the day. At the beginning of summer, caterpillars pupate in cocoons, in two to three weeks butterflies appear.
Before flowering gardens, plants are treated with insecticides. As gossamer nests appear, they are removed and destroyed manually.