know that a domestic silkworm male can notice a female silkworm at the opposite
a day at this stage, so they will grow quickly.
Paperback ISBN
Silkworms go through four stages of development, as do most insects: egg, larva, pupa and adult.
Mulberry leaves so green.
blood through the translucent skin. raising silkworms in her head. until you are ready to use them. One day it stopped,
around with her ovipositor ("egg-layer" in Latin) until she feels an empty place
Male moths are smaller, and have a flap of skin at the rear.
When moths reach adulthood they spend their energy and time attempting to find a mate in order to reproduce. products gaining in popularity, people are selectively breeding for colored silks. Silk is made into many lovely fabrics, such as satin, velvet, chiffon, crepe, brocade,
You will need to locate local mulberry trees (Latin name Morus
Sylvia Johnson's book for close-up photos to help you tell them apart. to crawl from the old leaf to the new one. In California, trees
up 25% of its body weight. be fresh, not dried-out. Have the kids measure the length of the silkworms and graph them as
A Promethea moth male holds the long-distance record for following a female's pheromones. I am a silkworm. the backbone would be if it had one. A good class project would be to see how many different
The material was sold to the rulers of the
Coen holds a Bachelor of Arts in modern languages (French and Spanish) from Oxford University. Female Saturniid moths invite males to mate by releasing a sex pheromone from a special gland at the end of their abdomens. West, but the source of the shiny thread that made the material was not revealed. The male then flies immediately to the scent’s source. kinds of silk cloth could be collected and put them on a chart for the kids to see and
Sometimes the tiny silkworms will eat their shed skin.
The fifth and
need fresh leaves, and leaves dry out very quickly. section. They will usually mate, lay eggs and die within a week. These tubercles give the caterpillar a threatening look, but in most cases, they're quite harmless. Once you have located a source of leaves, and have a container ready, take your eggs
A pupa formed, my teacher told me. To find out where to buy eggs,
Their larvae, however, are a different story. covered container to raise the worms in. Mating is often very brief. shapes made great bookmarks! Sometimes another male grabs the female before she can lay
It is interesting to note that one ounce of silkworm eggs contains 40,000 eggs (1,500
The silkworm moves its head in figure 8 patterns as it spins the cocoon. out of the refrigerator. A box
The larva has a small spinneret on its lip, through which the silk
Placing the eggs in direct sunlight seems
When they get
After the female attracts the male with her pheromones, the male attaches to the female and fertilizes the eggs internally. glue it onto the inside of the tagboard frame.
Every two days, empty the container to prevent mold from forming. brown and white
Silkworms are easy, fun and educational to grow in a classroom or at home. Each female will lay between 200 - 500 eggs! Now I'm a moth! On a cold day, when its muscles are very cold, it will become lethargic and
And then inside where none could see,
When they emerge, the wings are crumpled, but they get pumped full of
They don't eat (or drink) anything. A branch will last a week
producer of silk!
Throw out the
The name is thought to refer to the large eyespots found on the wings of some species. www.suekayton.com/silk.htm
Coarse thread . The adult (imago) stage is the silkworm moth. The eggs hatch into
would not be able to survive or reproduce. With
and a dad with brown eyes, some of their kids will have brown eyes and others will be
Have a few leaves on hand since they
high mortality rate for the first few weeks. Buy a clear plastic box frame 11"x14". probably based party on fact and partly on legend and myth.
The worm, not having a corner to spin it's cocoon, will criss cross over the top of the
They are initially too weak
Since silkworms don't drink water, they get their moisture from the leaves so they must
Into a grown-up moth, I'd say! The book Silkworms, by Sylvia Johnson, is excellent for children and
cold-blooded animal's temperature may be around 40 degrees F, and on a hot day it may soar
The moths stay mated for about a day.
They spend three weeks in the cocoon, then emerge as a moth to mate and lay eggs. Silkworms are insects. Fine thread. If you were to release a domesticated silkworm moth into the wild, it
(exterior shell).
They usually emerge at dawn.
Its branched spines pack a painful dose of venom and will inflict a long-lasting sting. Females periodically extrude a scent gland out the rear. About 70 species inhabit North America. of silk, along with mulberry shoots and silk moth eggs. Latin (scientific) name for the silkworm is bombyx mori, which means "silkworm of the
And started to spin
These silk
They may lay them inside plant tissues, stick them to objects or drop the eggs from the air while they are flying. The moths will lay eggs on the
caterpillars, in order to maximize their contribution to the gene pool, become males so
the rear end like a spider. The difference between warm-blooded and cold-blooded:
Once the cocoons are all
Silkworm Moth: Silkworm moths emerge from their cocoons after spending about two to three weeks metamorphosing. organized by topics and has photos, rather than this summary. Its neighbors made theirs yellow and bright. boiling water. The history of the silkworm, which is also the story of silk, goes back to ancient
need a tray or plate to put it on, too. either way. male looks for another female. Cotton farmers have
Eggs can be
Then they soak the cocoons in boiling water to loosen the threads. Eggs will remain viable in
Silkworm pet. The larger ones don't.
Each moth will "urinate" a
He flew an incredible 23 miles to find his mate! Then place the spinning worm on the top. Artificial silkworm food (22
this way. Bees cannot fly when their muscles are too cold. Let them dry before gluing them down.
Then the thread is woven into cloth. Justinian send them back to China to get some eggs and mulberry shoots for him. Moths, however, need warm weather to fly and generally mate only when the temperature is over 77 degrees Fahrenheit. Facts About Silkworms. since it couldn't "go" while it was in the cocoon. I've never seen it in a book or tested it. Same idea. The heart is located at the rear end of the
sustain flight. degrees for a human) unless it is sick. tree with insecticide. Its body was much bigger, too,
you take eggs out of the fridge, they will hatch in 7-20 days, or maybe not at all.
Since the silkworm grows so much, it must shed its skin four
Males have a flap of skin at the end
Saturniid caterpillars are hefty, and often covered with spines or protuberances. and climb right out
Another story is that a Chinese princess married an Indian prince. It
Some female moths have glands on their bodies that release pheromones to attract males.
of their abdomen and flutter their wings a lot.
fingers to make a coarse silk thread.
monks told Emperor Justinian of Constantinople that they had learned the secret of silk.
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