Pest Type: Fruit Pest
Row: Lepidoptera – Lepidoptera
Family: Ermine Moths – Yponomeutidae
It is found everywhere. It damages plums, cherry plums, apricots, cherries, cherries, thorns, mountain ash, and less commonly an apple tree.
Butterfly with a wingspan of 18-22 mm, front wings are white with 16-19 black dots located in three irregular rows; hind wings are gray. Egg 0.3 mm in size, yellowish, roundish. Caterpillar 14-16 mm long, yellow-gray; head, legs are black. Pupa – 8-11 mm, dark yellow; head, primordial wings, and cremaster are black. The cocoon is thin, white.
Caterpillars of the first age overwinter under the shield. At the end of April, they emerge from under the guards and immediately weave spider web nests, connecting leaves in pairs. Develop over 35-45 days, passing five centuries. Pellet in spider webs separately from each other. After 8-10 days, in late May-early June butterflies leave. Years last until mid-August. 14-16 days after the release of the butterfly mates, after which they begin to lay eggs on the 5-6 day. The female lays 15-40 eggs on smooth bark of thin branches and fills them with mucus, which quickly freezes in the air.
Fertility – 80-100 eggs. After 8-15 days, the caterpillars revive, fall into diapause and remain under a moisture-proof shield until the spring of next year. In spring, the caterpillars damage the leaves and braid the branches with a thick web. In the case of significant damage, the quantity and quality of the crop decreases, the growth of shoots decreases, the process of laying fruit buds is disrupted. The number of fruit ermine moths is reduced by adverse weather conditions for the pest and a significant number of entomophagous indicated for the apple ermine moth.
The protective measures are the same as for the apple ermine moth.