1. First, draw a sketch of the life stage of the silkworm on paper, and draw the image of the moth with black strokes.
Draw a sketch of the life stage of the silkworm on the paper with a pencil, and draw the shape of the moth in the adult state and the figure of the silkworm egg with black strokes, as shown in the following figure.
2. Then draw a picture of silkworm larvae with black strokes, which shows all stages from hatching to dormancy and molting, as shown in the following figure.
3. Then draw the figure of the growth stage of the silkworm after the second dormancy and molting with black strokes, as shown in the following figure.
4. Then, draw the figure of silkworm growing up with black strokes. As shown in the figure below.
5. Then, draw a picture of silkworms spinning into cocoons with black strokes, as shown in the figure below.
6. Then, draw a picture of the silkworm turning into a pupa in the cocoon with black strokes, as shown in the figure below.
7. Finally, use orange and orange pencils to color the patterns of silkworms at various stages, as shown in the figure below. In this way, by drawing the figures of various stages of silkworm, we can draw the whole life of silkworm.
Expand knowledge:
Silkworm is an insect, belonging to Bombycidae, and its scientific name is silkworm. Silkworm is an important economic insect for a long time, and it is widely raised because of its silk production. The following will analyze the classification, morphological characteristics, living habits, breeding methods and economic value of silkworms.
morphological character
Silkworms are about 3-5 cm long and are white or yellow in color. Silkworm's head is very small, with a pair of compound eyes and a pair of antennae, which are very short. Silkworm's body is divided into three parts: head, chest and abdomen. There are three pairs of legs in the chest and several pairs of feet in the abdomen. The silkworm's wings have degenerated and it can't fly. The mouthparts of silkworms are chewy, and they can chew plants such as mulberry leaves.
Living habits
Silkworm is an insect that feeds on mulberry leaves and mainly lives in a warm and humid environment. The life cycle of silkworm is divided into four stages: egg, larva, pupa and adult. Silkworm eggs are white or yellow, and the size is about1mm. After hatching, the larvae are white, about 65438±0mm long, and gradually grow up after molting for many times.
The larval stage of silkworm is about 25-30 days, during which it is necessary to eat mulberry leaves and other plants continuously. When the larvae grow to a certain extent, they will stop eating, start spinning and cocooning, and enter the pupal stage. The pupal stage of silkworm is about 10- 15 days. During this period, silkworm will molt and deform in cocoon. Finally, the silkworm will break out of the cocoon and become an adult.