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 ?
"Very superior types of silk silk can produce 4 quintals of cocoon from one box of silkworm eggs per cycle, far more than the usual type, disease resistance, and its success has been proven by farmer groups in Sukabumi," Kirsfianti explained.
Initially provincial in outlook, by the 1870s he refers to himself and others as "Japanese" (123), follows international developments, and has shifted his business from charcoal to cotton and, finally, to silkworm eggs. However, other men also become less parochial, and expanding knowledge of the outside world erodes the informational advantage on which his profits depend.
Horinouchi said the assistance was intended to help the RUPP to develop disease-free silkworm eggs for farmers in rural areas and share technical knowledge with them so they could breed silkworms for their livelihood.
Primary culture: The silkworm eggs were provided by Bursa Kozabirlik Company, Turkey.
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The moon spacecraft will also be conducting a fascinating biology experiment to check whether plant seeds will develop and silkworm eggs will hatch on the low gravity environment of the moon, according to Xinhua.
It is also carrying silkworm eggs to see if they can survive on the moon.
According to the Xinhua News Agency, Chang'e-4 is also carrying an intriguing biology experiment to see if plant seeds will germinate and silkworm eggs will hatch in the moon's low gravity.
Under the pivotal agreement, Kraig will import, rear and begin testing its first batch of recombinant spider silk silkworm eggs in Vietnam.
Owino, 39, gets the Bombyx mori silkworm eggs from National Sericulture Research Centre (NSRC) in Thika.The eggs come stuck by glue on a paper.
"The container will send potatoes, arabidopsis seeds and silkworm eggs to the surface of the Moon," explained Zhang Yuanxun, chief designer of the container.
In this study, we observed a consistently high expression of BmARM-like in silkworm eggs and during the early embryonic developmental stages (Fig.