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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Sericultural and Entomological Science
Journal Basic Information
Journal DOI :
Korean Society of Sericultural Science
Editor in Chief :
Volume & Issues
Volume 5 - Dec 1965
Volume 4 - Feb 1965
Selecting the target year
Effect of mulberry leaf picking in autumn on the non-budding and survival of grafting
Journal of Sericultural and Entomological Science, volume 5, 1965, Pages 1~5
The purpose of this work is to investigate the effects of picking leaves in autumn on the non-budding and survival of grafting. The results are as follows. 1) The leaf picking in autumn causes an increase of the non-budding ratio in the following spring. When tue whole leaves picking is compared with the control, the non-budding ratio increases 46 percent. In case of tone leaves on a single stem are picked in various tray, the non-budding ratio of picked portion is higher than that of non-picked. 2) The leaf picking in autumn with winter bud being grafted on stock in the next spring, decrease the survival of grafting. In case some leaves on a single stem are picked in various way, the winter bud of picked part is always poor in survival. 3) In the event of leavf picking in autumn, the yield always decreases 7∼20 percent, especially this phenomenon becomes serious in the under half part of the stem(20%) and whole leaves picking(12％) treatments.
Studies on the growth of mulberry branches after cut-down
Journal of Sericultural and Entomological Science, volume 5, 1965, Pages 7~17
1. New mulberry branches after spring prunning seemed not to have the growth period acording to the Fig. 1. The branches after summer prunning, however, showed the tendency of relatively fast growth for the first month and of hardy growth for the latter. 2. Due to the self-regulation in the course of growth, available branches in spring have been decided in number from the end of June to the beginning of July and in fall in early August. 3. The wattles decreased in number by means of picking up buds and so compared with the control the considerable effects were shown in the treatments. 4. Most buds on mulberry branches after the prunning were sprouted at the begining of whole budding period. The branches of the first sprouted buds were available and the latter became of the wattles. 5. After spring or summer prunning the shoots grew in vigorous if some of then were taken out. Therefore the length of branches increased by 20∼60％. It was the best way that the branches were taken out one third when the branches grew 30∼60cm in height.
Studies on the form and character of silkworm, Bombyx mori L. which bred from double copulation
Journal of Sericultural and Entomological Science, volume 5, 1965, Pages 19~23
Author studied to investigate the form and character of silkworm, Bombyx mori L. which bred from double copulation. The results obtained are as follows. 1. Some eggs of silkworm were fertilized evenly 10 minutes copulation, but it was varried by the race of the worm. In silkworm eggs production, the male and female should be separated from the early stage of 5th instar in order to do not make non hybrid eggs. 2. It was very difficult to find the tendency of fertilization ratio between homo race copulation and hetero race copulation in crossing with mates of two different race for a female (double crossing).
Studies on tussah silkworm, Antheraea pernyi
Journal of Sericultural and Entomological Science, volume 5, 1965, Pages 25~38
I. Breeding of tussah silkworm(preliminary report). The preliminary examination for bleeding has been carried out since 1963 in tussah silkworms. 1) The strain(l-MG-B)of the heaviest silk quantity was the green silkworm and brown cocoon in univoltine, and the strains(2-G-B, 2-MG-B) of the heaviest silk quantity were also the green silkwom and brown cocoon in bivoltine in both spring and fall in 1965. 2) It looks like the voltinism, the body color and the cocoon color have reached to pure line up to 1965. II. Best place for the winter of tussah pupa. This work was aimed to find out good ways for the winter of tussah pupa. 1) The hatch of bivoltine was better than that of univoltine. 2) The cocoons covered with the leaves were good in the emergence of moth. 3) The cocoons which were kept at natural temperature till the first emergence of moths would show bad in both hatch and emergence. 4) If some of the pupae kept under natural condition were controled at proper temperature for a few days, hatch and laying eggs were best. 5) The best places for the winter were the egg storage and the rearing room. III. Relation between incubation temperature and voltinism. 1) When the tussah pupa are kept at natural temperature during winter, the moths do not come out of the pupa. 2) There is no difference between about 18
and about 25
during incubation in hatching ratio. 3) The tussah silkworms of univoltine in mortality are stronger than that of bivoltine. 4) There is not any relation between voltinism and high or low temperature for pupa and eggs. IV. Induced mutation by gamma-ray and neutron in tussah silkworm. This work was carried out in order to induce the mutation by treating the pupa or the eggs of tussah silkworm with gamma my and neutron. The results obtained are as follows. 1. Though the whole pupa treated with neutron become moths, the moths have no ability to copulate each other. The only moths emerged from pupa treated with neutron, 4000
are able to lay all un-fertilized eggs, some of which have a hole on the surface and nothing of contents. 2. The non-diapause eggs are treated with neutron in spring, but the hatching ratio is 50∼60 percent, but the whole eggs treated with gamma ray are never hatched. 3. The sensitivity of the pupa to neutron is weaker than that of the eggs. 4. The hatching ratio is in direct proportion to the gamma ray dose. 5. Author find out a new mutant which is excellent in the cocoon quality, so he will do the progeny test next hear.
The Influence of vibration during distribution of loose-formed eggs (Bombyx mori) to farmers
Journal of Sericultural and Entomological Science, volume 5, 1965, Pages 39~42
The newly hatched silkworm can not come out with the head ahead, but on the contray, it comes out with the tail ahead when it comes out of the chorion, in case the loose-formed eggs are vibrated artificially, at the end of the incubation. So the newly hatched silkworm can not throw off the chorion alone which covers his head. This kind of eggs occurs about 30% when they are vibrated. In case they were raised, they could not grow well and some of them died. The result was quite bad. In conclusion, it would be better to distribute earlier the loose-formed eggs farmers and the loose-formed eggs must not be vibrated at the end of the incubation.
Relationship silk reelability with nonpermeative cocoon cooking after chemical treatment
Journal of Sericultural and Entomological Science, volume 5, 1965, Pages 43~46
This report was prepared to check silk reelalility and its quality when the cocoon was cooked in nonpermeative condition after trotted with some chemical solution. The obtained results were as followings. 1. A new chemical, Serisol, was developed by the author to help silk reelability 2. The chemical cooking method showed 0.4％ increase of silk yield more than the normal silk reeling method. 3. The chemical conducted good cocoon cooking without permeative process. 4. This method showed better cleanness and neatness than the normal one. 5. This method did not damage the silk quality because of use Serisol. 6. The proper dilution of Serisol was found as 2000 times for it.
Relationship winding test with silk finishing
Journal of Sericultural and Entomological Science, volume 5, 1965, Pages 47~51
This report was prepared to find the relationship between silk finishing method and winding test result and the obtained results were as followings. 1. The breaks of a lot double skein was larger than that of single skein during winding test. 2. The rear side of test skein showed about double breaks of surface side of it. 3. The skein on silk book corner showed worst breaks, but the inner skeins showed least breaks. 4. The silk breaks per every ten minutes winding period decreased by and by. 5. The danger of silk breaks during winding test showed more in double skein than single skein in case of inperfect silk finishing. 6. The proper moisture content of raw silk after finishing is 10∼11％.
Hydroxyproline determination in silk fibroin
Journal of Sericultural and Entomological Science, volume 5, 1965, Pages 53~55
This was the report of Hydroxyproline detection in silk fibroin and the obtained results were as followings. 1. Hydroxyproline was analized 25∼75 p.p.m. in specific species silk fibroin. 2. The amino acid was included more in crossed species silk fibroin than in the original species fibroin. 3. The number of amino acids in silk fibroin increased from 18 to 19 kinds.
Relationship tussah diets with its silk reelability
Journal of Sericultural and Entomological Science, volume 5, 1965, Pages 57~61
This report was prepared to find how warious tussah silk worm diets effect for the worm nutrition, its cocoon and reelability, Meantime, it was attacked the reeling effect of newly developed tussah cocoon cooking chemical, Tussah-lite. The results obtained are as followings. 1. The chemical composition of various diets were almost even, but Quercus acutissima Carrathers was the best from the nutrition point of view. 2. It was found that the more Calcium Oxalate, the better cocoon was formed, but Calcium Oxalate in the cocoon layer was found as almost same amount in case of different diet was fed. 3. It was also found that the more tannin, the better cocoon was formed, but the cocoon reelability was found as almost same in case of different diet was fed. 4. The cocoon reeling effect of newly developed chemical, Tussah-lite, showed 6∼7% silk yield from the tussah cocoon.
Study on the Tussah Silk Reeling Method
Journal of Sericultural and Entomological Science, volume 5, 1965, Pages 63~66
This experimental work is aimed to find out if there is a reasonable tussah silk reeling service. The results obtained are as follows, 1) The best silk reeling rate of tussah cocoon was 8.02% by dupion reeling machine, 7.44% by common with Autumn cocoons, and 7.23% by dupion machine, 6.79% by common with Spring. Those results are sup-erior to 6.00% of the former. 2) The cocoon grading ratio was 63∼68% with Autumn cocoons md 66∼70% with Spring. Spring cocoons showved more 2∼3% than Autumn in cocoon grading ratio. These seem to be resulted from the weather condition. 3) The reeling efficiency was 70g per labor for an hour. 4) The strength of tussah silk war 3g/d and elongation 26% The strength of tussah silk is weaker, and the elongation of it larger than those of raw silk. 5) As these results, the enterprise of the tussah silk reeling has become possible, and will develop as a new industry. Therefore. it is demanded that this new industry will be helped by the Government to get foreign money.