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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Sericultural and Entomological Science
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Journal DOI :
Korean Society of Sericultural Science
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Volume & Issues
Volume 33, Issue 2 - Dec 1991
Volume 33, Issue 1 - Jun 1991
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Hardwood Cutting with Callusing in the Mulberry(Morus bombycis Koidz.) I. Effect of a Root-Promoting Substance with Different Concentrations on Root Formation
Journal of Sericultural and Entomological Science, volume 33, issue 2, 1991, Pages 63~67
Various concentrations of
-naphthalence acetic acid(NAA) as a root-promoting substance were tested in hardwood cutting of the mulberry(Morus bombycis Koidz., cultivar : Shinkwangppong) to make clear the callusing effect on the budding and root growth. Budding and shoot growth of cuttings were delayed at high concentrations of NAA within 10 days of callusing. Especially more severe is it at higher than 50ppm. More than 93% of them, however, budded in two weeks when callused at less than 100ppm NAA. Although rooting was accelerated at high concentration of NAA from the bigining of cutting, after that, rooting percentage increased to reach 100% in 35 days of cutting in any concentration except 150ppm with relatively low rooting. Root growth was utmostly accelerated at 50ppm NAA to show the highest amount in number, length and weight of roots per cutting although high concentration of it decreased mean root length.
Hardwood Cutting with Callusing in the Mulberry(Morus bombycis Koidz.) II. Effect of Callusing Temperature on Root Formation and Growth
Kim, Ho-Rak ; Choe, Seung-Un ; Im, Su-Ho ;
Journal of Sericultural and Entomological Science, volume 33, issue 2, 1991, Pages 68~71
Mulberry cuttings from shoots of Shinkwangppong(Morus bombycis koidz.) had been callused in vermiculite separately at 15, 20, 25 and 30
for 15 days before transplanting them in greenhouse to make clear the effect of temperature on root formation and growth is as follow. The buds of cuttings started sprouting in 4 and 6 days of callusing at 30 and 25
, respectively, reaching 100% budding in 10 and 15 days of callusing. Budding was delayed, however, at low temperature, showing 86% and 92% at 15 and 20
, respectively, in 15 days. Rooting from the cuttings was also accelerated at high temperature, showing 97-100% rooting at 25
, in 15 days of callusing but no more than 93% at low temperature even in 35 days. Although high temperature increased root number and length after 15 days in callusing, no differences showed in the number and the weight at more than 20
in 35 days of cuttings.
Genetical Studies on the Non-molting Allele Mutation in Bombyx mori
Journal of Sericultural and Entomological Science, volume 33, issue 2, 1991, Pages 72~74
The recessive lethal mutation 'non-molting of Nho' (symbol, ㎚n) was founded on one preservation stocks. All dwarf larvae continued to eat a few mulberry leaves and very slightly increasing body-size over a 7 days, and then died without entering into molt. Linkage experiments showed that ㎚n was linked with Knob(K) on the 11th linkage group. Precise localization of the gene was performed by mating with ㎚ gene. This mutant was confirmed to be allelic with the ㎚ gene located on the same chromosome.
Comparison of Pathogenicity Parasporal Crystal Protein in some Bacillus thuringiensis
Kim, Yeong-Hun ; Kim, Sang-Hyeon ; Gang, Seok-Gwon ;
Journal of Sericultural and Entomological Science, volume 33, issue 2, 1991, Pages 75~81
The study has been carried out to acquire some basic informations about Bacillus thuringiensis for developing the microbial pesticide. Pathogenicity tests on three of B.thuringiensis var. aizawai, kurstaki, and dendrolimus were determined in two species of insects, H. cunea and B. moris. The pathogencity in varieties of B. thuringiensis against H. cunea and B. mori was depended on instar age of tested larvae. Bacillus thuringiensis var. dendrolimus, kurstaki, aizawai are arranged in order of pathogenicity against H. cunea and B. mori. In result Bacillus thuringiensis var. kurstaki was shown the most stable toxicity with respect to each instar of tested larvae.
Effects of Methacrylamide Treatment on Silk Fibers I. Effects of Reaction Conditions on Weight Increase of Silk Fibers
Journal of Sericultural and Entomological Science, volume 33, issue 2, 1991, Pages 82~86
The treatments of methacrylamide on silk fibers were studied in aqueous solution using potassium persulfate as an initiator, and suitable conditions of reaction were determined for weighing of silk fibers. The results obtained were summarized as follows ; The weight of MAA-treated silk fibers increased with monomer concentration. The adequate concentration of potassium persulfate was found to be 1.7%. Maximum weight increase was shown at initial pH 3.8 of reaction liquor controlled by buffer solution.
Studies on the Shrinkage of Silk Yarn by Neutral Salts
Journal of Sericultural and Entomological Science, volume 33, issue 2, 1991, Pages 87~92
The shrinkages and physical properties of silk yarn were studied on the effect of treatment concentration, time and temperature with various neutral salts. The degummed silk yarn was shrunk about 35 percent by highly concentrated solution of Ca(NO3)2 on conditions of S.G.(special gravity) 1.45 at 9
or S. G. 1.46 at 8
. About 40 percent of silk yarn was contracted in length by the treatment of CaCl2 solution on conditions of S. G. 1.33 at 9
for 5 mins. or at 85
for 10 mins. By treating the concentrated solution of LiBr the silk yarn showed about 40 percent of shrinkage on a conditions of S. G. 1.38,
24hrs. The physical properties of salt-treated silk yarn could be significantly changed with shrinkage variations. There were some differences in shrinkages between different type of salts. However, it was observed that generally the tenacity was decreased and breaking elongation increased as the shrinkage increased. The bulkiness of salt-treated silk yarn was increased by 110 to 120 percent compared with untreated yarn.
Influence of "Manta" on Some Economical Characters of Eri Silkworm, Samia cynthia ricini Boisdual
Magadum, V.B. ; Magadum, S.B. ;
Journal of Sericultural and Entomological Science, volume 33, issue 2, 1991, Pages 93~96
The "Manta"(Juvenile hormone analogue-Methoprene) was topically applied at 36.48 and 72 hrs after the fourth ecdysis to eri silkworm, Samia cynthia ricini with doses of 2.75
. The eri silkworm responded to 2.75
of "Manta" applied at 72 hrs after the fourth ecdysis, resulting in improvement of larval, cocoon, pupal and cocoon shell weigths.ocoon shell weigths.
Effect of Formalin Fumigation on Rotatory Cocooning Frame during Mounting Period
Seol, Gwang-Yeol ; Yang, Seong-Yeol ; Lee, Sang-Pung ;
Journal of Sericultural and Entomological Science, volume 33, issue 2, 1991, Pages 97~99
Disinfection of the rotatory cocooning frame is difficult under a multiple rearing system as the work is successively done. Accordingly, to investigate the effect of formalin fumigation on the rotatory cocooning frame during mounting period the mulberry leaves smeared with the water extract of dust collected form cocoonin frame after treatement were fed on the just molted 3rd instar larvae, 82% of them died with disease during 6 days, and negative effect of formalin fumigation takes place in terms of the cocoon reelability, showing 41% of it.
Features of Waste Water form By-Product Silk Treatment and Composition of Extracted Lipid
Journal of Sericultural and Entomological Science, volume 33, issue 2, 1991, Pages 100~102
The features of waste water from by-product silk treatment of silk reeling process were investigated and the lipid extracted from waste water was analysed. The COD of waste water from by-product silk treatment was at the level of 605 mgO/
Total Dissolved Solid Particles 2,335mg/
and Total Suspended Solid Particles 2,123mg/
. The lipid extracted from the waste water from by-product silk treatment was composed of triglyceride 76.8%, free fatty acids 12.5%, diglyceride 5.7% and free sterol 5.0%. In fatty acid composition of lipid, the content of loeic acid, linoleic and linolenic acid was 64.93%, whereas that of palmitic acid was 29.39% and stearic acid 4.93%.