Silkworm Eggs

Silkworm Eggs


the eggs of the moth of silkworms, from which come the caterpillars whose pupal stage is passed in silk cocoons. The eggs begin to form in the ovary of the caterpillar, then complete their development in the larva. The eggs of the Chinese silkworm have an oval, somewhat flattened form. They are covered with an elastic semitransparent shell with an opening at the tip (for spermatozoa penetration) and with many air-carrying canals for the embryo to breathe. Some silkworm types have eggshells covered with a sticky substance (“sticky” and “loose” silkworm eggs). The dimensions and weight of the eggs depend on the type, the nourishment of the female moths, and the laying periods. The average weight of the Chinese silkworm egg is 0.5–0.7 mg; the average clutch weighs 280–380 mg and consists of 500600 eggs. There are 1,500–2,000 eggs contained in 1 g. The oak silkworm lays larger eggs: 1 g has but 120 eggs. The Chinese silkworm hibernates in the egg stage, coming to life in the spring. In the bivoltine types every second generation of silkworm eggs does not hibernate.


Astaurov, B. L. Iskusstvennyi partenogenez u tutovogo shelkopriada. Moscow-Leningrad, 1940.
Mikhailov, E. N. Grena. Tashkent, 1953.


References in periodicals archive ?
The container will send potatoes, arabidopsis seeds and silkworm eggs to the surface of the Moon," explained Zhang Yuanxun, chief designer of the container.
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Limited tenders are invited for purchase of loose silkworm eggs.
According to the company, it has a large inventory of silkworm eggs ready to hatch and, over the coming weeks, plans to increase the hatch rate.
The minister said that a technical agricultural cadre will be trained to produce silkworm eggs and tap into Korean experience in this regard.
The princess smuggled out silkworm eggs by hiding them in her voluminous hairpiece--then Khotan kept the secret too (why share it with the Westerners and kill a good market.
Each agency contributed its own expertise, from safety and health measurements to the provision of seedling and silkworm eggs, and training in farming and entrepreneurship.
The disease is primarily transmitted to silkworm eggs within the body of the infected mother moth, but also externally, for example by rearing healthy silkworms with infected larvae.
Before the Soviet coup in April 1978, the government would send 17,000 boxes of silkworm eggs annually to Herat, whereas now they it only sends about 2,000 boxes, Nasrat said.