Morphological characteristics of silkworm
1, ant silkworm: When the silkworm hatches from the silkworm eggs, it is brown or black in color, extremely fine and hairy, and looks a bit like an ant, so it is called ant silkworm. Ant silkworm is about 2 mm long and 0.5 mm wide. After it crawls out of the eggshell, it will eat mulberry leaves after 2-3 hours.
2. Mature silkworm: At the end of the fifth instar, silkworm babies gradually show mature characteristics: first, the discharged feces change from hard to soft, from dark green to leaf green; Loss of appetite, decreased consumption of mulberry; The front digestive tract is empty and the chest is transparent; Then stop eating completely, the body drive is shortened, and the abdomen tends to be transparent. Silkworm's head and chest are raised, its mouth is full of silk, and it swings from side to side to find the breeding place of cocoon. Such silkworms are called mature silkworms.
3. Cocoon formation at the adult stage: People put mature silkworms in special containers or on cocoon traps, and silkworms will spin silk and form cocoons.
Extended data:
Living habits of silkworms
Silkworm is a kind of abnormal insect, the most common one is silkworm, also called silkworm, which is one of the economic insects that cocoon on mulberry leaves. Silkworm originated in China, its development temperature is 7 ~ 40℃, and its suitable feeding temperature is 20 ~ 30℃. Silkworm babies feed on mulberry leaves After eating mulberry leaves continuously, the body turned white and began to peel after a period of time. When peeling, they don't eat or move like sleeping for about one day. This is called "dormancy". Once skinned, it is the second instar larva. Even if it is peeled once, it will increase by one year, and the larvae will be peeled four times to become fifth instar larvae. After eating mulberry leaves for 8 days, they will become mature silkworms and start spinning and cocooning.
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