Pest Type: Fruit Pests
Row: Lepidoptera – Lepidoptera
Family: leaflets – Tortricidae
It is found everywhere. It damages apple, pear, plum, cherry plum, cherry, cherry, apricot, mountain ash, hawthorn, thorns, and other plants.
Butterfly with a wingspan of 17-21 mm, the front wings from the basal part are brownish-brown with a bluish tint and white spots at the inner edge, the upper part of the gray hue with brownish or black strokes; hind wings are gray-brown. Egg size 0.9? 0.7 mm, oval, milky white, transparent. Caterpillar 18-20 mm long, green-olive, covered with small spines. Pupa – 9-14 mm, dark brown, cremaster in the form of a truncated cone with eight hook-shaped bristles on top. Caterpillars of the third age overwinter in cocoons in cracks of the bark, branching branches and under dry leaves.
In April, in the phase of the green cone, the caterpillars leave the wintering sites and bite into the buds. Later they pull young leaves and buds into tangles, inside of which they feed. The development of caterpillars lasts 25-30 days and ends by the end of May.
Pupation begins during the period of mass shedding of petals in the apple tree and lasts until mid-June. The development of the pupa takes 8-14 days. Years of butterflies begin 12-14 days after the end of the flowering of the apple tree and last 15-20 days.
The female lays eggs one at a time or in small groups, 2-8, on the upper and lower surface of the leaf. Fertility – 200 eggs.
Caterpillars regenerated after 8-12 days skeletonize the lower surface of the leaf and, having reached the third age in the middle of summer, pass to wintering places. One generation per year is developing. Variable fruit leafworms are accompanied by two types of leafworms with a similar cycle of development and harmfulness – Ptycholoma lehenga and Ancylis achatana Den.