"Silkworm Baby is Born" Let's Raise Silkworms PPT Courseware 4

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"Silkworm Baby is Born" Let's Raise Silkworms PPT Courseware 4

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We have raised snails. How do snails grow and change throughout their lives?

How long do they live? Do you still want to know the growth changes of other animals throughout their lives and their lifespans? So in this lesson, we will study the little lives hatched from silkworm eggs.

New hope: The life of a silkworm starts from an egg, and a silkworm egg is a life.

Observe silkworm eggs

Color: Newly laid silkworm eggs are light yellow or yellow, turn into light red or light brown in 1-2 days, and then turn into gray-green or purple-black in 3-4 days. They will no longer change and remain until The eggs in the second spring are purple-black.

Shape: Approximately round, looking like millet grains.

Size: Approximately 1 mm wide and 0.5 mm thick.

Draw a silkworm egg:

What else was discovered: The center of the silkworm eggs is concave. The yellow eggs may be unfertilized eggs and will not hatch out silkworms. The white eggs are empty egg shells with small holes in them that have hatched silkworms.

The little life that comes out of the egg

The silkworm baby is about to hatch from the egg. What can we do for it? Then build a comfortable "home" for it!

Ask more why

You can do this: Poke small holes in the lid; if the weather is dry, sprinkle some water on the silkworm eggs.

How are silkworms hatched, and what do newly hatched silkworms look like?

Inside the hard shell of the silkworm egg is the yolk and serosa. When the outside temperature is suitable, the inside of the silkworm egg changes quietly. The embryo in the fertilized egg continuously absorbs nutrients during its development and develops into an ant silkworm. From the outside of the shell, you can vaguely see a black ring squirming inside. This is the silkworm baby that is about to hatch. Perhaps, you can also see silkworm babies chewing through the egg shells and crawling out.

The bodies of newly hatched silkworms are brown, very small, and have many fine hairs. Ant silkworms are about 2-3 mm long and about 0.5 mm wide, and they look a bit like ants.

hatching of silkworms

The hatching of silkworms requires air, a certain temperature and humidity, food and a safe and hygienic place.

If you want it to grow healthily, you need careful care and feeding.

Tips on raising silkworms

Silkworm babies love to eat mulberry leaves. As soon as the eggs are hatched, use a brush or feather to gently brush them onto the mulberry leaves.

To keep the silkworms well fed, the mulberry leaves should be fresh and kept dry, cut into pieces or strips.

Frequently remove silkworm feces and leftover leaves to keep the silkworm baby's "room" clean.

Place the baby silkworms in a well-ventilated area, and do not spray pesticides in the room where silkworms are raised.

Pay attention to correct feeding

After crawling out of the egg shell, it will eat mulberry leaves after 2-3 hours.

You need to know some tips on how to eat well. You must also keep the silkworm house clean and avoid harm, and give it a safe and hygienic place.

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"Silkworm Baby is Born" Let's Raise Silkworms PPT Courseware 3:

"Silkworm Baby is Born" Let's Raise Silkworms PPT Courseware 3 Observe the silkworm eggs. The newly born silkworm eggs are light yellow. They look flat and a bit oval with a magnifying glass. Use a ruler to measure them. They are about 1.2 to 1.3 mm long. If kept at room temperature, it will gradually turn purple-black. ..

"Silkworm Baby is Born" Let's Raise Silkworms PPT Courseware 2:

"The Silkworm Baby is Born" Let's Raise Silkworms PPT Courseware 2 Understand the History of Silkworm Raising in my country Our country is the first country in the world to raise silkworms and reel [sāo] silk for weaving. Silk has a history of about 5,000 years. Observe silkworm eggs. Newly hatched silkworm eggs are light yellow. Use a magnifying glass to...

"Silkworm Baby is Born" Let's raise silkworms PPT courseware:

"The Silkworm Baby is Born" Let's Raise Silkworms PPT Courseware. Mulberry harvesting and sericulture in ancient China. According to experts' research, sericulture in ancient China began more than 5,000 years ago. The mulberry industry in ancient my country was very developed, and sericulture has a long history, and a self-contained sericulture culture has already been formed. World..

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Update Time: 2024-09-30

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