: the frequency or number of annual broods (as of insects) — compare polyvoltine, univoltine.

What do you mean by voltinism?

Voltinism is a term used in biology to indicate the number of broods or generations of an organism in a year. The term is most often applied to insects, and is particularly in use in sericulture, where silkworm varieties vary in their voltinism.

What is voltinism with example?

Voltinism is the number of broods or generations of an organism within a year. Different types of voltinism exists and describe whether an organism has one, two or many broods a year. A photograph of a Speckled Wood butterfly (Pararge aegeria). The Speckled Wood butterfly can have one or two broods a year.

What do you mean by univoltine and multivoltine?

Univoltine – (adjective) referring to organisms having one brood per year. Bivoltine – (adjective) referring to organisms having two broods per year. Multivoltine – (adjective) referring to organisms having more than two broods per year.

What is a multivoltine species?

A multivoltine species is a species that has two or more broods of offspring per year. Multivoltine species are often short lived insects such as mosquitoes. They have a short adult lifespan and often die soon after mating. The larvae then develop quickly and multiple generations occur within a year.

VOLTINISM & MOULTINISM OF SILK MOTH

Which type of Voltinism has Tasar silkworm?

yamamai are the tasar silk worms of China and Japan respectively. These species feed on Quercus or Oak trees and are normally bivoltine. The tasar moths are fairly large insects. Females are larger and yellowish brown in colour, while males are smaller and brick red in colour.

Is silk A agriculture?

Sericulture, or silk farming, is the cultivation of silkworms to produce silk. ... Silk was believed to have first been produced in China as early as the Neolithic Period. Sericulture has become an important cottage industry in countries such as Brazil, China, France, India, Italy, Japan, Korea, and Russia.

What is meaning of univoltine?

: producing one brood in a season and especially a single brood of eggs capable of hibernating —used of insects — compare bivoltine.

What is univoltine silk?

(1) Univoltine:

These silk moths hatch once a year, so have one generation per year. These moths lay only hibernating eggs. In these eggs, the embryo enters diapause after partial development and hatches out during the following spring. So they produce only one brood per year.

What is univoltine insect?

A univoltine species is a species that has one brood of offspring per year. Many species try and coincide their life cycle with that of another species (such as a food plant) on which they rely. In the UK, many species of butterfly are univoltine and have just one brood per year. ...

What broods mean?

1 : the young of an animal or a family of young especially : the young (as of a bird or insect) hatched or cared for at one time a hen with her brood of chicks. 2 : a group having a common nature or origin the entire brood of chronicle plays— T. S. Eliot.

What is diapause in insect?

Diapause meaning is a physiological state found mostly in arthropods. In this state, developmental arrest or dormancy is seen that signifies shutting down of most life processes. During the life cycle of an insect, the diapause can happen at any stage such as embryonic, larval, pupal, and adult.

What is moulting in silkworm?

Moulting is the process when silkworms seized feeding, becomes immobile and prepare themselves for shedding their old skin to accommodate the fast growth. Four moults takes place during the entire larval period. ... Moulting period lasts for about 24 hrs and care should be taken not to disturb silkworms during this period.

Which of the following is mulberry silkworm?

Bombyx mori is popularly called the Chinese silkworm or Mulberry silkworm moth. It is well known for genuine silk.

What species is bivoltine?

A bivoltine species is a species that has two broods of offspring per year. Some species have a mixed strategy. ... Larvae following the single brood (univoltine) strategy are more likely have completed development.

How many types of mulberry silkworms are there?

Mulberry silkworms can be categorized into three different but connected groups or types. The major groups of silkworms fall under the univoltine ("uni-"=one, "voltine"=brood frequency) and bivoltine categories.

What are Tasar and Muga?

The Tasar, Eri and Muga silk are non-mulberry, wild silks and also known as Vanya Silks. Around 80% of Silk produced in India is of Mulberry variety with largest production in Karnataka, Andhra Pradesh and Tamil Nadu. Muga silk is unique in having a golden sheen and is a prized possession of India.

What is the meaning of Moriculture?

Cultivation of mulberry plants in order to obtain feed for silkworms and to obtain silk is called moriculture.

What is mulberry cocoon?

COCOON: white, oval in shape with fine to medium grains with scanty floss. Survival 85-90%, cocoon weight 1.80-1.95g, cocoon shell weight 0.45-0.5g, cocoon shell ratio 24-26%, Raw silk % 20-22%, filament length 1000-1300mts, neatness 85-90 (points). MOTH: Spinning to moth emergence period is about 13 days.

What is Monophagus?

: feeding on or utilizing a single kind of food especially : feeding on a single kind of plant or animal.

What is meant by Hypermetamorphosis?

: a method of development in an insect (as the blister beetle) in which the larva passes through numerous instars each markedly diverse from the rest in structure.

What is facultative diapause?

Insects with facultative diapause undergo a period of suspended development only when conditions require it for survival. Facultative diapause is found in most insects and is associated with bivoltine (two generations per year) or multivoltine insects (more than two generations per year).

What is silk short answer?

Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons.

What is sericulture India?

It is an agro-based industry. It involves rearing of silkworms for the production of raw silk, which is the yarn obtained out of cocoons spun by certain species of insects.