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

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

Learn about the history of sericulture in my country

my country is the first country in the world to raise silkworms and weave silk. Silk has a history of about 5,000 years.

Observe silkworm eggs

Newly born silkworm eggs are light yellow, and look flat and nearly round with a magnifying glass. Use a ruler to measure them. They are about 1 mm long and about the size of sesame seeds. If they are kept at room temperature, they will gradually turn purple-black.

Color: light yellow or purple brown

Shape: flat oval

Size: sesame size (width 1mm, thickness 0.5mm, length 1.2mm)

What can you find when you observe silkworm eggs through a magnifying glass?

There was a black ring moving.

What do newly hatched silkworms look like?

The body color is brown or dark brown, very small, about 2-3 mm long, and has many fine hairs. It looks a bit like an ant. It is called ant silkworm.

Pay attention to the changes in the silkworm eggs, record the date and temperature when the silkworms hatch, and think about the conditions related to the hatching of the silkworms.

Silkworm eggs will hatch faster if you put them in your pocket.

If the weather is dry, sprinkle some water on the silkworm eggs.

Tips on raising silkworms

Silkworms 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 "room" clean.

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

What should I do if I can’t find mulberry leaves?

If you really can't find mulberry leaves, you can temporarily use lettuce leaves instead of mulberry leaves, but you must ensure that the leaves are clean and dry. Wash the leaves and dry them before feeding them to the silkworms.

1. I know.

1. The newly hatched silkworms are ( ) colored, like little ants.

2. The mulberry leaves eaten by the silkworms should be cut into ( ) or ( ).

3. In addition to keeping the "room" of the silkworms clean, pay attention to placing the silkworms in ( ) and do not spray ( ) in the room where silkworms are raised.

2. I am a little judge.

1. When the weather is dry, put silkworm eggs in water and they will hatch easily. ( )

2. After the silkworms emerge from their shells, you can pinch them onto the mulberry leaves with your hands. ( )

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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. ..

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Update Time: 2024-06-19

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