Twenty-six bivoltine silkworm (Bombyx mori L.) genotypes were tested along with two check varieties (NB 4 D 2 and SH 6) for their performance. PDF | On Feb 27, , Zafar Iqbal Buhroo and others published Rearing Performance of Some Popular Bivoltine Silkworm (Bombyx mori L.). multiplication of silkworm breeds st P4lP3lPZ leaels and maintenance of . The bivoltine silkworms produce cocoons with high raw silk recovery and bivoltine.

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The length of the rack can be according to the length of the rearing house. These changes have made the domesticated strains entirely dependent upon silkqorm for survival. In accordance to the current study, the traits such as larval weight, cocoon weight, shell weight, silk ratio, ERR showed positive correlation with cocoon yield Ghosh et al.

While fixing the card board the iron pin of card board should be arranged in criss-cross. Hygienic conditions should be maintained inside and the surroundings of the chawki rearing center. Nutritional changes of four varieties of Mulberry leaves at infected with Fungus Cercospora moricola.

Low temperature delays the spinning. Accordingly, many productive and qualitatively superior bivoltine hybrids have been developed by utilizing Japanese commercial hybrids as breeding resource material [ 2 ].

BIVOLTINE SILK WORM REARING

CSR hybrid rearing requires separate rearing house bivotline proper disinfection can be done and there is good cross-ventilation facility. Students have a chance to observe complete life cycles of insect from egg stage to larvae, pupa, moth. Mahatma Gandhi was critical of silk production based on the Ahimsa philosophy “not to hurt any living thing”. Cost of production is reduced, 7.

Such variations in the manifestation of phenotypic traits of the breeds studied can be ascribed to the influence of environmental conditions. The newly hatched silkworm larvae have low water content the body.

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Before proper bed drying, if shootlets are fed it leads to unequal larvae.

Bombyx mori – Wikipedia

Studying the performance of silkworm, Bombyx mori L. After harvesting the cocoons, floss attached to the card board should be removed by using hard plastic brush or flame gun. Whether CB and BV rearing can be taken up simultaneously? Whether rotary mountage is available in market? Generation wise mean performance for reeling of HH12 at two different temperatures. A silkworm’s preferred food is white mulberry leaves, though they may eat other mulberry species and even osage orange.

The main objective of silkworm rearing is to produce qualitatively and quantitatively superior cocoons, which in turn will have a direct bearing on the raw silk production. Beneficial insects Pest control Encarsia formosa Ladybird Parasitoid wasp. They are not monophagous since they can eat other species of Morusas well as some other Moraceaemostly Osage orange. Labour biboltine is reduced 29 What is the optimum temperature and humidity during chawki rearing?

Generation wise zilkworm performances for rearing of HH10 at two temperature conditions. What is the ideal rearing house for Indian condition?

One of the objectives of the breeder is to recommend stable breeds to the farmers for rearing under different environmental conditions. Retrieved 18 October Sankar Naik, and N. What are the reasons for non-uniform hatching?

Three rearing trays consist larvae were maintained for each variety of mulberry leaves. When the larvae hatch completely, two layers of light cotton nylon nets mesh size mm in diameter are spread over the newly hatched larvae and fed with chopped mulberry leaf. What are the reasons for melting cocoons in hilly areas and how to improve the reliability?

The correlation for few traits is negative and for some it is positive [ 13 — 16 ]. Frequent bivoltinne with less feed. Archived from the original on 7 May Molecular Biology and Evolution.

View at Google Scholar M. The success of sericulture industry depends upon several silkwogm of which sil,worm impact of the environmental factors such as biotic and abiotic factors is of vital importance. This suggests a single event of domestication, and that it happened over a short period of time, with a large number of wild worms having been collected for domestication.

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Generation wise mean performances for rearing of HH at two temperature conditions.

Psyche: A Journal of Entomology

After cleaning the floss, arrange the card board randomly and pile up on vinyl sheet card board bivootine one sheet. Two ropes of 6ft length are spread parallel to one another for a length of 5 ft on the rearing bed solkworm a margin of 1. It affects the uniform hatching. These are the reasons, farmers are getting Rs. The better traits observed during favourable seasons than unfavourable seasons might be due to the influence of climatic conditions. After hanging the rotary mountages bivkltine worms 1 falling.

The silkworm is the larva or caterpillar of the domestic silkmothBombyx mori Latin: The imposition of exposure to high temperature levels in 5th instar and the resultant low pupation rate ssilkworm be attributed to the low feeding activity of the silkworm resulting in the physiological imbalance and poor health of the larvae and an increased number of nonspinning worms in the mountages.

Sericulturethe practice of breeding silkworms for the production of raw silk, has been under way for at least 5, years in China, [1] from where it spread to IndiaKoreaJapanand the West. Children’s book with lots of photos. Silkworm breed which are reared over a series of environments exhibiting less variation are considered stable.