"Silkworm Baby is Born" PPT courseware

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"Silkworm Baby is Born" PPT courseware

Observe silkworm eggs

Newly born silkworm eggs are light yellow and look flat and somewhat oval with a magnifying glass. Use a ruler to measure them and they are about 1.2 to 1.3 mm long. If they are kept at room temperature, they will gradually turn purple-black.

incubation............

Silkworm eggs are generally stored in the refrigerator. After taking them out, they are placed at room temperature. The most suitable temperature for incubation of silkworm eggs is about room temperature 25°C. The eggs will gradually turn purple and black, and the larvae will hatch in about two weeks. After the larva bites open the egg shell, it first exposes its head and then crawls out of the egg shell.

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

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.

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.

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"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 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...

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Update Time: 2024-11-18

This template belongs to science courseware E-education edition third grade science volume 2 industry PPT template

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