Podkorovaya Leaflet (Enarmonia Formosana)

Pest Type: Fruit Pests

Row: Lepidoptera – Lepidoptera

Family: Leaflet Tortricidae

It is found everywhere. It damages the apple tree, pear, plum, cherry, cherry, apricot, peach, mountain ash.

Butterfly with a wingspan of 15-18 mm; front wings with a bright pattern of stripes and spots that alternate. They consist of dark brown, yellow-orange and metallic-shiny scales; at the front edge there are seven good noticeable yellow-white strokes; closer to the middle of the wing – an orange spot with metal-shiny scales; hind wings are brownish-brown with yellow-gold shiny fringe. The egg is 0.9-1 mm in size, round, flat, black-red. Caterpillar 11-14 mm long, translucent, yellow chairman; prothoracic and anal scutes of gray-brown color. Pupa – 7-8 mm, dark yellow, with black eyes; cremaster in the form of a small pointed pyramid with four hooked setae.

Caterpillars of different ages of winter under the bark of fruit trees. In the spring they resume feeding with bast and sapwood, laying winding passages in them and covering them with cobwebs. In April-May, caterpillars pupate under the bark in a cradle, pasted over with excrement and drilling flour. Before the butterfly leaves, the pupa protrudes half from the bark. In 12-20 days after pupation, butterflies fly out, which lay eggs in the lower part of the trunks in the crevice of the bark, to the places of injuries and roots located above the soil surface. Fertility – up to 100 eggs. Caterpillars regenerated after 7-9 days penetrate the cortex and make passages there. In the fall, with the onset of cooling, they fall into diapause. One generation is developing in a year. The periods of pupation, a flight of butterflies, laying of eggs and the revival of caterpillars are quite extended. Trees populated by the pest weakly grow and bear fruit. In places of damage from the bark, corks of excrement stuck together with cobwebs stick out. In the morning gum flows out. In some varieties of cherries and cherries in the places of damage sagging and growths form.

The number of subcrustal leafworms is reduced by many predators and parasites. Predatory bugs from the families Nabidae and Anthocoridae and predatory bugs from different families feed on caterpillars in the passages.

The laid eggs are infected with a trichogram. Caterpillars and pupae infect endoparasites from the ichneumonid family; from the family of braconids; from the chalcid family – Brachymeria rugulosa Först; from the eulofid family; from a family of tahin flies.

Protective measures. Purification and burning of dead layers of the cortex. Preventing the placement of roots above the surface of the soil. Insecticide spraying of skeletal branches, trunks, and the root neck during a massive summer of butterflies often coincides with the first treatment against the first generation of the apple codling moth.

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