Occurrence, nature of damage, prevention and control of other pests of silkworm like Pantatomid bug … History of Mulberry Silkworm: Bombyx mori is popularly called the Chinese silkworm or Mulberry silkworm moth. Biology of Bombyx Mori: The mulberry silk moth, Bombyx mori belongs to the family Bombycidae. Jpn. Integument: its structure and derivatives. Share Your PPT File. Unit-G 10 Hrs. 14. Proc. : its preventions through physical, mechanical and chemical means, integrated management of the pest. There are over 450 morphological, physiological and biochemical characters recorded at present, among them 300 ( including multi-allele) had been located on 27 Diseases 7. Other Silkworm Moths. Due to its small size and ease of culture, the silkworm has become a model organism in the study of lepidopteran and arthropod biology. It is well known for genuine silk. 13' Popular silkworm breds and hybrids of Karnataka and their economic traits. Life Cycle 5. Recently, it has become possible to study the phylogeny at the level of nucleic acid, protein and terminal product, owing to rapidly developed molecular biology. Pebrine Pebrine is a chronic and disastrous disease of the silkworm was responsible for the sudden collapse of the silkworm industry of … 5. 4 0 obj Thus the lifecycle of a silkworm begins again. Biology of silkworm Bombyx mori - Life cycle of Bombyx mori. voltinism and moultinism – popular mulberry silkworm varieties of Karnataka and India. Acad. China is the native place of this moth, but now it is totally domesticated and successfully reared in … UNIT – II 1. thMorphology of Bombyx mori: Egg, larva (Newly hatched and V instar), pupa and moth. Ltfe cycle of silkworm Bombyx mori L. 15. In this article we will discuss about the biology and life cycle of bombyx mori. Economic Importance 6. Metamorphosis – Definition – types – significance. • The silk is produced in two glands in the silkworm's head and then forced out in liquid form through openings called spinnerets. 17. the major protozoan disease of the silkworm is the pebrine disease, so named due to the appearance of black peppery patches following infection. The larva of Bombyx mori, commonly called a silkworm, is host specific to mulberry. Silkworm genetics Genetics of the qualitative traits. 3. the origin of the silkworm and differentia­ tion of the silkworm races because of a lack of more efficient technical methods for an approach to the problem. The importance of silkworm in … The insertion of foreign genes into silkworm genome and the control of their expression by diverse promoters have become possible but are not yet efficient enough for commercial use. 2. External Features 4. Unit-S 9 Hrs. 4 Fukuda, S. (1951) The production of the diapause eggs by transplanting the suboesophageal ganglion in the silkworm. 16. Morphology of egg, larva, pupa and adult. Genetic engineering of the silkworm, Bombyx mori, opens door to the production of new kinds of silk and to the use of silkworms as proteosynthetic bioreactors. • The silkworm spins approximately 1 mile of filament and completely encloses itself in a cocoon in about two or three days. • The silk solidifies when it comes in contact with the air. The purpose of this article is to review silkworm (Bombyx mori) as a genetic resources of Turkey. It was estimated that silkworm genome consist of about 4.8× 108 bp, its genetic information volume is about one sixth of human being. 12' Classification of silkworms based on moultinism, voltinism and geographical distribution. Biology, nature of damage and other hosts of Dermistes spp.
2020 voltinism and biology of silkworm ppt