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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Eggs should be free from pathogens. The Denier varied over seasons and feeding trials from 2. Cocoons should be transported during the cooler hours. Why chawki mulberry leaf should have more mol ture content? There are three important factors which determine the quality of leaves, viz.
During evaluation, emphasis was given on the phenotypic expression of traits of economic importance under different biivoltine conditions. What are the precautions to be taken for harvesting the cocoons?
BIVOLTINE SILK WORM REARING
Whether use of plastic nivoltine Increases reliability of cocoons? No, cocoons harvested from bamboo chandrike should not be mixed with cocoons harvested from rotary mountages. Immediately after transportation of shoots, the bundle should be opened, shoots should be kept vertically upward direction. After cleaning the floss, arrange the card board randomly and pile up on vinyl sheet card board on one sheet.
How to assess the quality bivoltkne the eggs.? No, as such silkworms prefer dim light during rearing. What is the durability of rotary mountages? Before proper bed drying, if shootlets are fed it leads to unequal larvae. What are the advantages of loose eggs? The following precautions are to be taken during rain’ season: Cost of production is reduced, 7.
Uses authors parameter link CS1 maint: Less space is required to handle moths during egg preparation. The traits such as larval length, larval width, larval weight, shell ratio, filament length and filament weight showed positive correlation with yield.
After removing the old bed, the bundles are open and spread leaving the ropes below the bed, which will be helpful for removing the bed at the end of the rearing. Optimum rearing temperature and humidity should be maintained and three feeding schedule 6. What are the reasons for non-uniform hatching? View at Google Scholar H. However, if manpower is available pick up method is the best method. Care should be taken to avoid the ants and other predators.
The results are in line with the findings of [ 29 — 39 ]. Home-stored product entomology Clothes moth Cockroach Housefly.
Psyche: A Journal of Entomology
Bombyx mori females are also one of the few organisms with homologous chromosomes held together only by the synaptonemal complex and not crossovers during meiosis. No occurrence of stained cocoons in rotary mountages and floss formation is also less compared to bamboo chandrike.
After they have molted four times, their bodies become slightly yellow and the skin becomes tighter. Eggs are incubated in darkness. Good quality mulberry leaves 2. At the time of removal of card board, the frame I be placed vertically in such a way that all the iron hooks I down ward. When loose eggs are incubated and brushed in crowded conditions, the larvae hatched from the lower side of the eggs enter the empty egg shells by crawling and later they can not come out of the shells due to the presence of bristles on the larval body.
The mean larval widths of larvae which fed different mulberry varieties during different seasons are given in Table 2.