Widely spread over Dahuria, north China and the adjacent countries; one of the Chinese silkworms is said to feed on the leaves.
The mulberry-tree (Morus alba), whose leaves serve as food for silkworms, is cultivated in every region,, considerable progress having been made in its cultivation and in the rearine of silkworms since 18co.
The industries embrace the making of cheese, objects in cement, matches, and brushes, the production of silkworms, and printing; and the town is the centre of a rich agricultural district.
The industries are few, the growing of wine, breeding of silkworms, making of agricultural instruments, printing and the manufacture of laces being the chief.
Large numbers of mulberry trees are planted for rearing silkworms, especially in Kutais, Erivan, Elisavetpol (Nukha) and Baku (Shemakha); the groves occupy nearly 150,000 acres, and the winding of the silk gives employment to large numbers of the population.
Silkworms are bred.
It has a royal arms factory established by Charles IV., and other ironworks, considerable manufacture of macaroni, paper, breeding of silkworms, and some fishing and shipping.
Poultry, bees and silkworms are commonly kept.
In 1888 a school of sericulture was founded by the public debt administration for the rearing of silkworms according to the Pasteur method.
Again, in the early years of the administration (1885), the Pasteur system of selection of silk-worms' eggs for the rearing of silkworms was introduced, and an " Institute of Sericulture " on modern lines was erected (1888) at Brusa for gratuitous instruction in silk-rearing to students from all parts of the empire.
Silk spinning and weaving are carried on on antiquated lines, and silkworms are reared in a desultory fashion.
Fruits and vegetables are plentiful, and there are large herds of buffaloes, goats and sheep. Silkworms are reared.
The wide suburbs are remarkable for their gardens, which produce great quantities of fruits (especially plums, which are dried and exported), tobacco, mulberry leaves for silkworms, and wine.
The chief industries are the manufacture of woollens, cottons, silks, glass, laces, tobacco, straw-plait, paper, sugar and hemp, the breeding of silkworms, iron-founding and working, timber-cutting and shipbuilding.
Wheat and other cereals are cultivated, with fruits of many kinds, olives, and vines which yield a wine of fair quality; while saffron is largely produced, and some attention is given to the keeping of bees and silkworms. Stock-farming, for which the wide plains afford excellent opportunities, employs many of the peasantry; the bulls of Albacete are in demand for bull-fighting, and the horses for mounting the Spanish cavalry.
This empress is said to have devoted herself personally to the care of silkworms, and she is by the Chinese credited with the invention of the loom.
Used many efforts to encourage the planting of the mulberry and the rearing of silkworms both at home and in the colonies.
It was caused principally through the representations of Samuel Whitmarsh as to the capabilities of the South Sea Islands mulberry (Mores multicaulis) for feeding silkworms; and so intense was the excitement that plants and crops of all kinds were displaced to make room for plantations of M.
The art of sericulture concerns itself with the rearing of silkworms under artificial or domesticated conditions, their feeding, the formation of cocoons, the securing of these before they are injured and pierced by the moths, and the maturing of a sufficient number of moths to supply eggs for the cultivation of the following year.
The soil in which the mulberry grows, and the age and condition of the trees, are important factors in the success of silkworm cultivation; and it has been too often proved that the mulberry will grow in situations where, from the nature of the leaf the trees put forth and from other circumstances, silkworms cannot be profitably reared.
Cf seed of 30 grammes producing 30,000 to 35,000 silkworms (30,000 may be depended upon to reach the cocoon stage) will give a harvest of 130 to 140 lb fresh cocoons and an ultimate yield of about 12 lb raw silk properly reeled.
But about the year 1853 anxious attention began to be given in France to the ravages of a disease among silkworms, which from its alarming progress threatened to issue in national disaster.
So early as 1849 Guerin Meneville observed in the blood of diseased silkworms certain vibratory corpuscles, but neither did he nor the Italian Filippi, who studied them later, connect them distinctly with the disease.
It is the administrative centre of a district (sanjak) producing and exporting barley, oats, spelt and canary seed, and largely planted with mulberry trees, on which silkworms are fed.
In 1901), silkworms' eggs to Russia and Persia.
Turning now to instances of the opposite kind, it is known that silkworms which spin colourless cocoons are more resistant to the attacks of a certain deadly fungus than are those which spin the yellow ones.
The leading industry is the breeding of silkworms and the spinning of silk.
Silkworms are bred, and some silk is spun; and the export of honey and wax is not inconsiderable.
She is said to have been the first to introduce into South Carolina (and into continental North America) the cultivation and manufacture of indigo, and she also imported silkworms-in 1753 she presented to the princess of Wales a dress made of silk from her plantations.
The principal industry is the spinning and weaving of silk, chiefly from tussur or jungle silkworms. There are also several lac factories.
Other kinds of silk are native to certain parts of India, such as those produced by the " castor oil " and the muga silkworms of Assam; but the chief of the wild silks is the tussore silk, which is found in the jungles nearly throughout India.
Silkworms have been bred with success in some departments, and the cochineal insect is found wherever the conditions are favourable for the cactus.
In 1870 Pasteur had proved that a disease of silkworms was due to an organism of the nature of a bacterium; and in 1871 Oertel showed that a Micrococcus already known to exist in diphtheria is intimately concerned in producing that disease.
Pisciculture has been for centuries successfully pursued by the Bohemian peasants, and the attempts recently made for the rearing of silkworms have met with fair success.