Pest Type: Fruit Pests
Row: Lepidoptera – Lepidoptera
Family: Scoops – Noctuidae
It is found everywhere. More abundant in areas of sufficient moisture. It damages apple trees, plums, cherries, cherries, apricots, black currants, and some field and vegetable crops.
Butterfly with a wingspan of 36-40 mm; fore wings brown with fuzzy transverse lines; the wedge-shaped spot is black, round and kidney-shaped spots are slightly lighter than the main background; hind wings are gray. The egg is 0.65-0.75 mm in size, round, white with a brown spot at the apex. Caterpillar 28-40 mm long, green with a brown pattern and light dots; the back and two stripes are light and bordered with dark green or brown touches; the ventral side is green with yellowish dots. Pupa 18.5 mm, dark brown.
Pupae overwinter in the soil in an earthen cradle, at a depth of 2-5 cm. The flight of butterflies begins 7-10 days before the apple tree blooms. Years last 40-50 days. 2-3 days after the departure, the females lay eggs on the lower side of the leaves in heaps of 40-60 pieces. Fertility – 800-1500, sometimes more than 2000 eggs.
Embryonic development lasts 3-10 days. Caterpillars feed on 25-50 days: younger ages – skeletonize, older ages – eat leaves from the edges or gnaw round holes in them. After completing feeding, the caterpillars pass into the upper soil layer and pupate in the earthen cradle. After 7-10 days, second-generation butterflies fly out, which also lay eggs on leaves. Caterpillars regenerated after 3-6 days damage the leaves. Having completed the development, which lasts 30 days, the caterpillars pass into the soil, where they pupate in earthen cradles and remain there until spring. Two generations develop in a year.
The leaves of fruit and forest crops can damage two other species of scoops, which develop in two generations and winter in the pupal stage.
Protective measures. Autumn tillage in aisles and near-stem circles. Loosening of the soil during the pupation of caterpillars of the first generation. If the caterpillars damage the scoops more than 20-25% of the leaves – spraying the trees with insecticides or biological products.