Latin name: Agriotes spectator
Russian name: Small Nutcracker
Pest Type: Multi-Pest
Row: Coleoptera – Coleoptera
It is widespread in Russia everywhere. Larvae damage cereals, potato tubers, beets and carrots, seeds and seedlings.
Beetle measuring 6 – 8.5 mm, dark brown, sometimes light brown, with gray pubescence. The front-back is elongated, its length slightly exceeds the width, antennae and legs brownish-yellow; at the front chest below the narrow outgrowth, which enters the recess; such a device allows nutcrackers upturned on their backs by bending their bodies, bouncing up and standing on their feet with a distinctive sound.
The egg is 0.5 mm wide, oval, white, smooth.
The larva of the last age of 18.5 mm in size, has a color from yellow to dark yellow. Throughout life molt 8 times.
Wintering is in the soil, at a depth of 100 cm, larvae of different ages are at a depth of 50 – 80 cm. In the forest-steppe zone of Russia, beetles appear on the soil surface in the first half of May and occur until mid-June. Massive years and egg-laying – usually at the end of May. They feed on the pollen of flowers, rarely cereal leaves. The female lays eggs in the soil near the roots of cereal plants; maximum fecundity reaches 100 – 120 eggs. Larvae that are born in late May-early June feed on the roots of cereals, damage seeds, tillering nodes, underground stems, and tubers. Full development is completed in four years.