The document discusses lac cultivation and processing in India. It notes that lac is a resinous secretion produced by lac insects living on certain tree species. India is a major producer of lac-based shellac. Lac cultivation faces risks from lack of technology, poor brood lac availability/quality, and vulnerability of insects to predators/disease. PRADAN works to improve incomes of lac rearers through training and new cultivation techniques. The document provides details on lac insect hosts, inoculation methods, harvesting, processing, uses, and challenges faced in lac production.
Presentation (1) diseases and pest of silkworm.Dev Dixit
pest of silkworm : Uzifly, Dermestid beetle. diseases: Grasserie,flacherie, muscardine, pebrine . pests and diseases of mulberry tree plant: morus alba, morus indica etc.
Presentation (1) diseases and pest of silkworm.Dev Dixit
pest of silkworm : Uzifly, Dermestid beetle. diseases: Grasserie,flacherie, muscardine, pebrine . pests and diseases of mulberry tree plant: morus alba, morus indica etc.
The presentation contains the description about various parts of morphology of the honey bee viz: head, type of mouthpart, abdomen including the legs and wings, and the abdomen.
The rearing of silkworms for the production of silk
is called sericulture.
India is the second largest silk producing country in
the world next to China.
Silk is the secretion from the salivary glands which
are found on both sides of the alimentary canal of
silkworm larvae and this secretion hardens into
fine threads called silk.
Sericulture is the silk producing agro-industry
India is the second largest silk producing country in the world after china.
Sericulture or silk farming is the rearing of silkworm for the production of silk
Silk is known as queen of textile and biosteel because of its strength
A Chinese tale of the discovery of the silkworm’s silk was by an ancient empress Lei Zu , the wife of the emperor.
She was drinking tea under tree, when a silk cocoon fell into her tea cup and the hot tea loosened the long strand of silk
As she it out, and started to wrap the silk thread around her flinger, she felt the warm sensation
When silk ran out, an larva appeared. She realized that it was this larva that produces the silk
Soon, she taught this to people and it became wide spread
Introduction
Sericulture, or silk farming, is the rearing of silkworms for the production of silk.
Species of silkworm
Mulberry silkworm
Tasar silkworm
Muga silkworm
Eri silkworm
Oak silkworm
Giant silkworm
History
Types of silk
Tasar
Eri
Mulberry
Muga
Life cycle
Advantages
Uses
Diseases
Pebrene
Grasserie
Flacherie
Muscardine
Production of silk India
Research Institutes
Artificial production
In vitro culture of embryo
Tissue culture media- Grace’s medium
Cell line production
Nutrition production
silk worm is a holo metabolous insect four stages are there in its life cycle. 1. Egg 2. Larva ( 5 instars) 3. Pupa 4. Adult. rearing of silkworms is called sericulture. Moriculture is the science of mulberry cultivation to rear silk worms for silk production. Bombyx mori feed specifically on mulberry leaves, Different types of silk worms. There are five major types of silk of commercial importance, obtained from different species of silkworms which in turn feed on a number of food plants: Except mulberry, other varieties of silks are generally termed as non mulberry silks. India has the unique distinction of producing all these commercial varieties of silk. SILK WORM TYPES ARE:- 1. Mulberry silk worm. 2. Tasar silk worm. 3. Oak Tasar silk worm. 4. Eri silk worm. 5. Muga silk worm. silk gland is modified salivary gland produces silk, The silk of silkworms is secreted by a pair of labial gland, known as silk glands. The silk glands lie ventral to the alimentary canal. In full grown larvae, these occupy most of the body cavity. The silk glands are tubular in shape with different diameters in different regions. Each gland has 3 distinct regions
The presentation contains the description about various parts of morphology of the honey bee viz: head, type of mouthpart, abdomen including the legs and wings, and the abdomen.
The rearing of silkworms for the production of silk
is called sericulture.
India is the second largest silk producing country in
the world next to China.
Silk is the secretion from the salivary glands which
are found on both sides of the alimentary canal of
silkworm larvae and this secretion hardens into
fine threads called silk.
Sericulture is the silk producing agro-industry
India is the second largest silk producing country in the world after china.
Sericulture or silk farming is the rearing of silkworm for the production of silk
Silk is known as queen of textile and biosteel because of its strength
A Chinese tale of the discovery of the silkworm’s silk was by an ancient empress Lei Zu , the wife of the emperor.
She was drinking tea under tree, when a silk cocoon fell into her tea cup and the hot tea loosened the long strand of silk
As she it out, and started to wrap the silk thread around her flinger, she felt the warm sensation
When silk ran out, an larva appeared. She realized that it was this larva that produces the silk
Soon, she taught this to people and it became wide spread
Introduction
Sericulture, or silk farming, is the rearing of silkworms for the production of silk.
Species of silkworm
Mulberry silkworm
Tasar silkworm
Muga silkworm
Eri silkworm
Oak silkworm
Giant silkworm
History
Types of silk
Tasar
Eri
Mulberry
Muga
Life cycle
Advantages
Uses
Diseases
Pebrene
Grasserie
Flacherie
Muscardine
Production of silk India
Research Institutes
Artificial production
In vitro culture of embryo
Tissue culture media- Grace’s medium
Cell line production
Nutrition production
silk worm is a holo metabolous insect four stages are there in its life cycle. 1. Egg 2. Larva ( 5 instars) 3. Pupa 4. Adult. rearing of silkworms is called sericulture. Moriculture is the science of mulberry cultivation to rear silk worms for silk production. Bombyx mori feed specifically on mulberry leaves, Different types of silk worms. There are five major types of silk of commercial importance, obtained from different species of silkworms which in turn feed on a number of food plants: Except mulberry, other varieties of silks are generally termed as non mulberry silks. India has the unique distinction of producing all these commercial varieties of silk. SILK WORM TYPES ARE:- 1. Mulberry silk worm. 2. Tasar silk worm. 3. Oak Tasar silk worm. 4. Eri silk worm. 5. Muga silk worm. silk gland is modified salivary gland produces silk, The silk of silkworms is secreted by a pair of labial gland, known as silk glands. The silk glands lie ventral to the alimentary canal. In full grown larvae, these occupy most of the body cavity. The silk glands are tubular in shape with different diameters in different regions. Each gland has 3 distinct regions
There are so many jute and ornametal pests present in Our country.Here i just elavorate some serious pests including some serious pest name,their scientific name with figure.
Seed production and breeding of pearl Oyster &.pptxAbhayBamaniya2
so this presentation includes breeding and seed production of both edible and pearl oyster, which are basically same in a way. note that this does not includes pearl formation in the pearl oyster but after reading this presentation you might learn how to the culture the oyster. good luck! and have fun.
The science that aims to study the life, behavior & activity of honey bee in order to obtain bee products and crop pollination. Honey bee is a social & beneficial insect. They lives in hive.
Reviving the Indigenous Poultry Breed - Kadaknath - Enhancing Livelihoods of ...copppldsecretariat
This Note showcases a government initiative to promote and introduce in new areas, indigenous poultry - Kadaknath, in order to enable bio-diversity conservation as well as enhance livelihoods that can reap benefits for the tribal poultry rearers as well as maintain their poultry heritage.
Although the project is fairly recent and support of the implementing agency is presently continuing, a number of lessons emerging from the practice can help future replication thereby establishing it as a sustainable community initiative.
[ Originally posted on http://www.cop-ppld.net/cop_knowledge_base ]
A chart showing the fate of each part of an early embryo, in a particular blastula stage is called fate maps. It is done because the correct interpretation of gastrulation is impossible without the knowledge of the position which are the presumptive germinal layers (Ectoderm, Mesoderm and Endoderm) occupy in blastula.
Fate mapping is a method used in developmental biology to study the embryonic origin of various adult tissues and structures. The "fate" of each cell or group of cells is mapped onto the embryo, showing which parts of the embryo will develop into which tissue. When carried out at single-cell resolution, this process is called cell lineage tracing. It is also used to trace the development of tumors.
DNA sequencing is the process of determining the sequence of nucleotides (A, T, G, and C) in the DNA. It includes method or technology that is used to determine the order of the four bases: adenine, thymine, guanine and cytosine.
The chain-termination method developed by Frederick Sanger and coworkers in 1977. This method used fewer toxic chemicals and lower amounts of radioactivity than the Maxam and Gilbert method. Because of its comparative ease, the Sanger method was soon automated and was the method used in the first generation of DNA sequencers.
published a DNA sequencing method in 1977 based on chemical modification of DNA and subsequent cleavage at specific bases. Also known as chemical sequencing, this method allowed purified samples of double-stranded DNA to be used without further cloning.
Maxam-Gilbert sequencing requires radioactive labeling at one 5' end of the DNA and purification of the DNA fragment to be sequenced. Chemical treatment then generates breaks at a small proportion of one or two of the four nucleotide bases in each of four reactions (G, A+G, C, C+T). The concentration of the modifying chemicals is controlled to introduce on average one modification per DNA molecule. Thus a series of labeled fragments is generated, from the radiolabeled end to the first "cut" site in each molecule. The fragments in the four reactions are electrophoresed side by side in denaturing acrylamide gels for size separation. To visualize the fragments, the gel is exposed to X-ray film for autoradiography, yielding a series of dark bands each corresponding to a radiolabeled DNA fragment, from which the sequence may be inferred.
Cloning is the process of producing genetically identical individuals of an organism either naturally or artificially.
It is the process of taking genetic information from one living thing and creating identical copies of it. The copied material is called a clone.
Nature has been doing it for millions of years. For example, identical twins have almost identical DNA, and asexual reproduction in some plants and organisms can produce genetically identical offspring.
Cloning in biotechnology refers to the process of creating clones of organisms or copies of cells or DNA fragments (molecular cloning).
Bacteriophage- types, structure and morphology of t4 phage, morphogenesisDr. Dinesh C. Sharma
Escherichia virus T4 is a species of bacteriophages that infect Escherichia coli bacteria. It is a member of virus subfamily Tevenvirinae (not to be confused with T-even bacteriophages, which is an alternate name of the species). T4 is capable of undergoing only a lytic lifecycle and not the lysogenic lifecycle.
Each cell of a multicellular organism contain the same genetic material, but the expression of the gene is different in different type of cell group. On the basis of expression requirement they are grouped in to
Structural Gene- Mostly expressed once in a life
Vital Gene- Involved in of vital biochemical processes such as respiration and need to be expressed all the time
Functional Gene- Genes are not expressed all the time. They are switched on an off at need
The regulation of Gene required in case of functional gene and its explained by Francois Jacob, Jacques Monod and Andre Lwoff (Nobal Prize in 1961)
From studies and predictions such as Dreyer and Bennett's, it shows that the light chains and heavy chains are encoded by separate multigene families on different chromosomes. They are referred to as gene segments and are separated by non-coding regions. The rearrangement and organization of these gene segments during the maturation of B cells produce functional proteins. The entire process of rearrangement and organization of these gene segments is the vital source where our body immune system gets its capabilities to recognize and respond to variety of antigens.
The cells of the B line synthesize immunoglobulins. They are either produced at a membrane (on the surface of the B-lymphocytes) or are secreted (by the plasmocytes)
Theory of preformation,
Epigenetic theory,
Theory of pengenesis,
Recapitulation theory,
Germplasm theory,
Mosaic theory,
Regulated theory,
Gradient theory
Theory of organizers.
Sericulture is the cultivation of silkworms to produce silk. Bombyx mori (the caterpillar of the domesticated silk moth) is the most widely used species of silkworms.
Slide 1: Title Slide
Extrachromosomal Inheritance
Slide 2: Introduction to Extrachromosomal Inheritance
Definition: Extrachromosomal inheritance refers to the transmission of genetic material that is not found within the nucleus.
Key Components: Involves genes located in mitochondria, chloroplasts, and plasmids.
Slide 3: Mitochondrial Inheritance
Mitochondria: Organelles responsible for energy production.
Mitochondrial DNA (mtDNA): Circular DNA molecule found in mitochondria.
Inheritance Pattern: Maternally inherited, meaning it is passed from mothers to all their offspring.
Diseases: Examples include Leber’s hereditary optic neuropathy (LHON) and mitochondrial myopathy.
Slide 4: Chloroplast Inheritance
Chloroplasts: Organelles responsible for photosynthesis in plants.
Chloroplast DNA (cpDNA): Circular DNA molecule found in chloroplasts.
Inheritance Pattern: Often maternally inherited in most plants, but can vary in some species.
Examples: Variegation in plants, where leaf color patterns are determined by chloroplast DNA.
Slide 5: Plasmid Inheritance
Plasmids: Small, circular DNA molecules found in bacteria and some eukaryotes.
Features: Can carry antibiotic resistance genes and can be transferred between cells through processes like conjugation.
Significance: Important in biotechnology for gene cloning and genetic engineering.
Slide 6: Mechanisms of Extrachromosomal Inheritance
Non-Mendelian Patterns: Do not follow Mendel’s laws of inheritance.
Cytoplasmic Segregation: During cell division, organelles like mitochondria and chloroplasts are randomly distributed to daughter cells.
Heteroplasmy: Presence of more than one type of organellar genome within a cell, leading to variation in expression.
Slide 7: Examples of Extrachromosomal Inheritance
Four O’clock Plant (Mirabilis jalapa): Shows variegated leaves due to different cpDNA in leaf cells.
Petite Mutants in Yeast: Result from mutations in mitochondrial DNA affecting respiration.
Slide 8: Importance of Extrachromosomal Inheritance
Evolution: Provides insight into the evolution of eukaryotic cells.
Medicine: Understanding mitochondrial inheritance helps in diagnosing and treating mitochondrial diseases.
Agriculture: Chloroplast inheritance can be used in plant breeding and genetic modification.
Slide 9: Recent Research and Advances
Gene Editing: Techniques like CRISPR-Cas9 are being used to edit mitochondrial and chloroplast DNA.
Therapies: Development of mitochondrial replacement therapy (MRT) for preventing mitochondrial diseases.
Slide 10: Conclusion
Summary: Extrachromosomal inheritance involves the transmission of genetic material outside the nucleus and plays a crucial role in genetics, medicine, and biotechnology.
Future Directions: Continued research and technological advancements hold promise for new treatments and applications.
Slide 11: Questions and Discussion
Invite Audience: Open the floor for any questions or further discussion on the topic.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
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Richard's aventures in two entangled wonderlandsRichard Gill
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Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
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Slides from:
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https://www.etran.rs/2024/en/home-english/
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Lac culture and Cultivation
1. Dr. Dinesh C. Sharma,
K.M. Govt. Girls P.G. College
Badalpur, G.B. Nagar
2.
3. Lac is the scarlet resinous secretion of a
number of species of lac insects, of which the
most commonly cultivated species is Kerria
lacca and Laccifer lacca (India). The insect
Laccifer lacca, living off the sap of certain
trees, secretes lac resin. The processed resin
is called Shellac and has numerous industrial
applications including in the food and drug
industries. India is a major producer of
Shellac.
4. Lac cultivation is beset with numerous risks
and uncertainties. For one, technological
advances have not filtered down to the
rearers, and they are unable to access
adequate working capital to buy brood lac
(mother insects).
Furthermore, the availability and quality of
the brood lac is highly uncertain. The lac
insect itself is highly vulnerable to
predators, diseases and natural elements,
and no insurance mechanism exists to
mitigate such ricks.
Among the Adivasis, Lac rearing and
cultivation is a traditional occupation
5. PRADAN works to revive a dying traditional
livelihood by helping to enhance incomes of lac
rearers. In collaboration with the Jharkhand
Government and the Indian Lac Research Institute
(ILRI), Rachi PRADAN provides technical trainings
on modern rearing techniques to local Adivasi youth
and promotes technologies developed by ILRI.
Methods for rearing on alternative host trees such as
palash and kusumi have been successfully initiated.
The leading producer of Lac is Jharkhand, followed
by the Chhattisgarh, WestBengal,
and Maharashtra states of India. Lac production is
also found in Bangladesh, Myanmar, Laos, Vietnam,
parts of China, and Mexico.
6. Cultivation begins when a farmer gets a stick (broodlac)
that contains eggs ready to hatch and ties it to the tree to
be infested. Thousands of lac insects colonize the
branches of the host trees and secrete the resinous
pigment. The coated branches of the host trees are cut
and harvested as sticklac.
The harvested sticklac is crushed and sieved to remove
impurities. The sieved material is then repeatedly
washed to remove insect parts and other soluble
material. The resulting product is known as seedlac. The
prefix seed refers to its pellet shape. Seedlac which still
contains 3-5% impurities is processed into shellac by
heat treatment or solvent extraction
7. Host trees
Pongam or Honge (Millettia pinnata) is a native of
India and grows in profusion, generally planted as
avenue trees by the forest department. It's renowned
for its shade and is well known in traditional uses for
its medicinal properties. It is also grown as a host plant
for lac insects.
Kerria lacca can be cultivated on either cultivated or
wild host trees.
In India the most common host trees are
Dhak (Butea monosperma),Ber (Ziziphus
mauritiana),Kusum (Schleichera oleosa), (Reported to give the best
quality and yield).
In Thailand the most common host trees are
Rain tree (Samanea saman),Pigeon pea (Cajanus cajan)
In China the common host trees include
Pigeon pea (Cajanus cajan),Hibiscus species
In Mexico-Barbados nut (Jatropha curcas)
Estimated yields per tree in India are 6–10 kg for Kusum, 1.5–6 kg for
Ber, and 1–4 kg for Dhak. The bugs' life cycles can produce two sticklac
yields per year, though it may be better to rest for six months to let the
host tree recover.
8. The quality of Lac depends upon the quality
of host plant. So there should be suitable
host plant according to environmental
condition.
When the host plant reach a proper height
they undergo pruning. Branches less than
2.5 Cm diameter are selected for pruning.
Branches less than 1.2 Cm in diameter are
cut at a distance, but branches more than
3.8 Cm from their base.
9. The process by which lac insects are introduced to the new
host plant is called inoculation or infection. This may be of
two types-
(A) Natural inoculation- Occur by natural movement of
swarming larvae from one plant to other
(B) Artificial inoculation- Lac insects are introduced to
new host plant in a planned and scientific manner by the
cultivators.
About two weeks before swarming, the lac bearing sticks are
cut into pieces and kept for two weeks in cool place
When the larvae starts emerging, the sticks are tied with the
help of strings to the branches of new host tree.
The stick of brood lac may be tied in three ways
10. Cultivators must have accurate knowledge
of time of swarming because methods are
directly related with the swarming of
larvae.
The eggs become orange coloured before
hatching.
At the time of swarming the upper surface
of female cell has yellow spot on the anal
region.
11. The process of scrapping lac from branches of host tree
is called Harvesting or Reaping.
Harvesting is of two types-
(A) Immature harvesting- Scarping of lac before
swarming, collected lac is called Ari Lac.
(B) Mature harvesting- Scraping of lac after
swarming, Obtained lac is called Phunki Lac. It is the
most common method.
Lack bearing twigs are cut in to pieces called Stick Lac
(Brood lack for next generation). Then the lac
encrustation is scrapped from the stick with the help of
knife.
13. Lac is reddish, brittle, solid, rich in resin (68-
90%)
Wax, minerals, sugar, dye, water are also
present in small amount.
The quality and color of lac depends on gum and
resin present in host plant.
Lac is insoluble in water but soluble in alcohol.
Bad conductor of heat and fuses easily on
heating
It has adhesive property.
14. Insects-Small winged insects called
chalcid are common predator, their larvae
feed on lac insect causing death.
White moth & Gray Moth are major
predators.
Rats, bats, squirrels, monkeys & some
birds also destruct the lac crop in many
ways.
Climatic factors as excess heat, excess cold,
heavy rain, high humidity and storm cause
damage to the lac crop.
15. (i) Cultural Methods-
Following pre cautionary measure should be
taken at the time of inoculation.
(a) The brood lac showing minimum enemy
attack should be selected for inoculation.
(b) The brood stick should not estimate any
parasite or predator.
(c) Each stick should contain a large number
of healthy larvae which are about to swarm.
(d) Host plant should be altered for proper
nutrition.
16. (ii) Artificial Methods-
(a) Stick lack should be immediately converted
into seed lack as a result the predator and
parasite get killed.
(b) or bundle of stick lac are tied with stones and
immersed in rivers or pounds for about a week, as
a result of this predator and parasite get killed.
(iii) Biological Methods-
Control by hyper parasite insects which are not
harmful for lac crop.
17. (i) Used in preparation of varnishes, paint, toys,
bangles, gramophone records and buttons.
(ii) Consumed as sealing agents.
(iii) Used in the preparations of electrical goods,
lac is used as insulating agents.
(iv) Also used for silvering the back of mirror
and filling ornaments.
(v) Nail polishes and dyes are by products of lac
industries.