Pest Type: Fruit Pests
Row: Lepidoptera – Lepidoptera
Family: Leaflet Tortricidae
It is found everywhere. It damages the berries, preferring all currants, rowan, thorn, hawthorn, rosehip, oak, birch, linden, maple, poplar, ash, barberry, buckthorn, hazel, spruce, larch, etc.
Butterfly with a wingspan of 16-24 mm; fore wings terry yellow or light brown; the base of the wings, the middle of the band and the upper spots are brown, bordered by brown lines; hind wings are dark gray with a yellowish front edge. 1.5 mm egg, yellow-green, oval. Caterpillar of the first age is gray-green with a blackhead, of the last age – from yellow-green to brown; the chairman is yellowish-brown, with dark eye and buccal spots, up to 22 mm long. Pupa – 10-14 mm, light brown with a darkish back; cremaster in the form of a narrow, drawn lobe with eight hook-shaped bristles.
Caterpillars of the third age overwinter in dense silky cocoons at the base of the buds, in cracks and under the scales of the bark, in branching branches, under dry leaves attached by a spider web to the branches. At an average daily temperature of 12 ° C, during the period of bud opening, caterpillars emerge and begin to feed on leaves that open in buds and flowers, braiding them in a loose web. The leaves are folded in half along the central vein and skeletonized from the inside. They damage the ovaries, gnawing holes in them. The spring period of nutrition lasts from 23 to 45 days. Caterpillars pupate in a damaged and undamaged leaf, collected by a cobweb. After 11-14 days, butterflies begin to fly out. Due to hostile pupation, the flight of butterflies is extended for a long time.
Females lay eggs on the upper side of the leaves. Fertility – 200 eggs, which are most often placed in two to four clutches. Embryonic development lasts 10-12 days. Revived caterpillars skeletonize leaves, damage the fruit, gnawing in them under the cover of a leaf attached by a spider web, pits, and winding grooves. Such damage is especially dangerous because it often causes rotting of the fruit. A significant part of the caterpillars of the third age goes to winter, the rest continue to develop, pupate and give butterflies of the second generation. Revived caterpillars of the second generation, damaging leaves, and fruits, cause significant damage to the crop of late ripe varieties. Caterpillars switch to wintering in late September – early October.
In addition to current fruit trees and shrubs can damage several species of leafworms wintering in the caterpillar stage and have two generations.