Root Circadian (Pentastiridius Leporinus)

Pest Type: Sugar Beet Pest

Row: Equine – Homoptera

Family: Cixiids – Cixiidae

It is found everywhere. It damages beets, potatoes, cabbage, peas, cereals, and other crops.

The adults are 6–9 mm in size, the body is flattened, the chairman is short, with a rounded front edge, the anterior back is short, wide; the shield is black; wings are flat folded, light gray, longer than abdomen; abdomen short, flattened; hind legs hopping. Egg size 0.6 mm, white, shiny. Larva-7-10 mm, light brown; the front of the body is slightly darker than the back.

Larvae of III-IV centuries hibernate in the soil at a depth of 5-20 cm. In April, with the onset of heat, nutrition on beetroots that remain in the soil is restored. Later they go to the roots of crops sown after beets. In early June, larvae that reached the 5th century turn into imago in soil cracks. They fly from mid-June to early August and feed on the leaves of sugar beets and other crops. Damaged areas lose their color and look like whitish spots. Cicadas are carriers of the sugar beet mosaic virus. At the end of June in July, females lay eggs in soil cracks at a depth of 4-10 cm. Each clutch has an average of 60-70 eggs and can be covered with a wax-like fluff. Fertility – up to 170 eggs. After 14-16 days, larvae are regenerated, which populates the root crop with colonies of 10-20 individuals in each.

The introduction of saliva pheromones into plant tissues and the suction of juices by larvae and adults lead to stunted growth and development, a decrease in the yield and sugar content of root crops; for planting – to a sharp decrease in seed germination. Food continues until the onset of cold weather. Having reached the III-IV century, the larvae remain in the soil until spring. One generation develops per year. Lowering the temperature at the wintering site to -5 ° C causes the death of the larvae. Cold and rainy spring also contributes to the death of a significant part of the pest.

Adults, larvae and laid eggs destroy ground beetles, bedbugs from the Nabidae and Antocoridae families, carnivorous thrips, spiders and other arthropods. In the abdomen of cicadas, the larvae of the Pipunculidae family of flies parasitize. More than 12 species of cicadas damaging sugar beet have been noted. More common than others: yellowish cicadas, yellow cicadas, mottled cicadas, dark cicadas, and other species.

Protective measures. Compliance with crop rotation. Deep autumnal plowing. Complete removal of sugar beet root crops from the plantation. Weed control. In case of damage to the circadian plant, more than 5% of the plants – insecticide treatment of sugar beet crops and plantings.

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