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Feeding on the leaves of the tussah tree, the tussah silkworm spits out silk cocoon insects. It belongs to Lepidoptera, family of large silkworm moths. The scientific name is Antheraea pernyi Guērin-Mēneville. The serpentine silkworm is native to China, and is derived from a wild silkworm that inhabited the hillside serpentine trees in ancient times and was domesticated and reared for a long time. Therefore, it is also called wild silkworm or mountain silkworm. Quercus serrata belongs to the temperate-type economic insects, and its living temperature range is 8-30℃, the temperature range for growth and development is 11-25℃, and the optimal temperature range is 22-24℃. Mainly distributed in China, in North Korea, the former Soviet Union, India and Japan and other countries also have a small amount of distribution.

The serpentine silkworm is a completely metamorphosed insect, which passes through four developmental stages of egg, larva, pupa and adult with completely different morphology and physiological functions. The egg is the stage of embryonic development of Quercus serrata to form a larva; the larva is the only stage of growth for Quercus serrata to take food, accumulate nutrients and complete the synthesis of silk and spit silk cocoon; the pupa is the transitional stage of metamorphosis of the larva to the adult, and through the pupa stagnation to pass through the cold winter; and the adult is the reproduction stage of mating, egg-laying, and reproducing the offspring.

The serpentine silkworm feeds on the leaves of oak plants of the family Crustacea, such as Quercus acutus, Quercus mongolica and Quercus serrata. In addition, it can also feed on the leaves of a few plants such as Artemisia, Santolina, chestnut, maple, pear, apple, etc. Small silkworms like to eat young leaves, and large silkworms like to eat mature leaves. 1 silkworm from hatching to cocooning, the spring silkworm period of about 50-54 days, about 30-35g of leaves, the autumn silkworm period of about 46-50 days, 55-50g of leaves. quercus serrata larvae need to go through four sleeps and moult, each moult, incremental 1 age, to the 5th age of maturity and spitting silk The cocoon is made by the oldest silkworms.

The silkworm is affected by light and other factors, and there is a difference between 1 and 2 generations, i.e. 1 and 2 generations in a year.

The sericulture sericulture is divided into many varieties in the group according to the characteristics of sex, body color, habit, cocoon shape, silk quantity, etc. The varieties are mostly named by the body color, place of origin, sex, breeding number, and a special economic trait, etc. The sericulture sericulture in Liaoning is used in the production of sericulture. The main varieties of sericulture applied in Liaoning sericulture area are Qinghuang No. 1, Qing No. 6, Quercus Early No. 1, Liao Quercus No. 1, and Sanli Silk, etc.; the main varieties of sericulture applied in Shandong Province are Huangandong, JiaoLan, and LuQing, etc.; and the main varieties of sericulture applied in Henan Province are SanSan and SanJiu.

The larvae of the serpentine silkworm begin to spit silk and form cocoons when they are old and mature, and the larvae pupate inside the cocoons and undergo stagflation or non-stagflation, and then cross over safely under the protection of the cocoon shell and continue to reproduce their offspring. Spitting is a kind of excretion phenomenon to remove excess amino acids. If artificial interference with the normal spitting or closed spitting holes, will cause amino acid poisoning and death. 1 sericulture cocoon, spring cocoon length of about 4.5cm, cocoon width of 2.1cm, autumn cocoon is slightly larger, cocoon length of 5.2cm, cocoon width of 2.4cm. general female cocoon, male cocoon is small. The effective silk cocoon length, generally about 700m, the highest up to 1,500m.

Cocoon is a high-quality raw material for young spinning industry, serpentine silk is a high-grade commodities, made of gorgeous clothing, serpentine silk in the military, chemical industry, electricity and other aspects of a wide range of uses. The pupa and moth of Quercus serrata are raw materials for chemical, pharmaceutical and food industries. The eggs of Quercus serrata are also good intermediate hosts for biological control of crop pests, such as the breeding of red-eyed wasps to control the corn borer.

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Quercus serrata industry