Sheep lice, also known as rickets, are commonly known as "sheep lice." It is caused by parasites parasitizing on the skin of sheep. Its main feature is itchiness, hair loss, and weight loss, which is harmful to the sheep industry. 1. Pathogen The pathogen of this disease is aphids. The aphids that infect sheep are mainly sucking worms (itch itch) and parasitic on the long hairs of the skin; the aphids of the invading goats are mainly perforated worms (parasites) and inhabit the deep tunnels of the skin. Locust habits live on the skin of the sheep and it is easy to die after leaving the skin. The female lays eggs on the skin, and the eggs develop adult (ovary-larvae-naive-imma) over 10-15 days. The spread of the disease is mainly through direct contact with healthy sheep and diseased sheep. 2. Symptoms Multiple sites of sheep are long, thick and dense. Such as the back, buttocks, tail and other places; goat hairy hair or short hair parts of the place, such as the lips, mouth, around the nostrils, eye ring, ears, breasts, scrotum, inside the limbs and so on. After the sheep has been infected with rickets, the skin is itchy, extremely restless, and the affected part is often scratched on the wall by biting or using a hoof to kick the affected part. The affected area is covered with hair and fluffy wool. The skin is thickened and inflamed. It flows out of exudates and forms into a dry skin. Due to the extreme itching of the diseased sheep, it affected the intake of food and rest. As a result, the sheep became increasingly thin and their physical quality decreased. 3. Prevention (1) The prevention of medicated baths is conducted every summer and early fall and late autumn. (2) Sheep purchased from other places should be isolated and observed for 15-30 days to ensure that there is no disease and then mixed with sheep. (3) Shu Libao (produced by Young's company in the UK) treatment. The therapeutic concentration is 200 mg, kilograms. (4) deltamethrin treatment. The therapeutic concentration is 50 mg, kg. (5) Treatment of 30 nymphaemic EC (produced in Shijiazhuang Chemical Factory). Dilute it 1:5000 times, sickle sheep or smear the affected area. (6) Dried tobacco leaf sulfur iodide treatment. 90 grams of dry tobacco leaves, 30 grams of sulphur-iodine, 1.5 kilograms of water, soaked in the water for a day and night, boiled first, then boiled, removed the tobacco leaves, and then added sulfur to dissolve and smear the affected area. (7) Benevolence 20% EC, Japan) treatment. The bath concentration is 80 mg, kilograms. China Agricultural Network Editor
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