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  • ICAR and TNAU E-Course Summarized

    Summarized Notes
  • The silk of a silkworm is a…? (IFFCO 2022)

    Question: The silk of a silkworm is a…? (IFFCO 2022)

    Options:

    4th moult
    3rd moult
    Either a or b
    2nd moult

    ✅Explanation:

    • Silkworms go through a series of molts (shedding their skin) as they grow. The silkworm spins its cocoon after the 4th molt. Here's a breakdown of the silkworm life cycle:
    -Egg: The life cycle begins with an egg.
    -Larva (Caterpillar): The egg hatches into a larva, also known as a caterpillar or silkworm. This stage is all about eating and growing.
    -Molting: The silkworm molts several times to accommodate its increasing size.
    -Cocoon: After the 4th molt, the silkworm spins a cocoon made of silk fibers. This is where it undergoes metamorphosis.
    -Pupa: Inside the cocoon, the silkworm transforms into a pupa.
    -Adult Moth: The pupa develops into an adult moth, which emerges from the cocoon to reproduce.

    🔑Key Points:
    -The study of the cultivation of silkworms to produce silk is called Sericulture.
    -The life cycle of a silkworm is Egg > Caterpillar > Pupa > Adult.
    -The egg is the first and primary stage of the life cycle of Silkworm.
    -The egg is laid by a  female moth and the egg is having the size of small dots.
    -More than 350 eggs are laid by a female moth at a time.
    -The eggs hatch in the springtime due to the warmth in the air.
    -This procedure takes place once a year.
    -Silkworm arises after the eggs crack and they are hairy.
    -They feed on mulberry leaves and consume a large amount of these leaves for around thirty days.
    -The Silkworms spin a cocoon around themselves which protects them.
    -This cocoon is made up of a single thread of soil.
    -Cocoon appears as a small cotton ball.
    -The pupa is a motionless stage.
    -The last stage is when the Pupa changes into an adult moth.
    -The Silk was invented around 3500 BC in China.

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