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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Sericultural and Entomological Science
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Journal DOI :
Korean Society of Sericultural Science
Editor in Chief :
Volume & Issues
Volume 32, Issue 2 - Dec 1990
Volume 32, Issue 1 - Mar 1990
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Studies on the Mulberry Graftages V. Survival and Regrowth of Lifted Mulberry (Morus alba L.) Graftages after Exposure to Air.
Journal of Sericultural and Entomological Science, volume 32, issue 1, 1990, Pages 1~4
The resistance against drying of mulberry (Morus alba L.) graftages lifted in the fall and spring was examined by measuring water loss, survival, and regrowth. The graftages were exposed on the ground an4 covered with 2 sheets of straw mat for 0, 1, 3, 6, 10, and 15 days. 1. Temperatures in the mat ranged from 13 to -6.5
in fall and 24 to -2.8
in spring. Relative humidity was 37 to 100% in fall and 20 to 100% in spring. 2. Water loss from the graftages was less than 10% after 10 days exposure in fall, whereas there was 9.8% loss with 1 day exposure in spring. 3. Six days exposure in the spring caused the root hairs to dry and the root surface to become wrinkled longitudinally and turn yellowish-red. 4. Maximum exposure which allowed 100% survival and regrowth after planting was 6 days in fall and 3 days in spring under 2 sheets of straw mat.
Several Soil Chemical Properties on Mulberry Fields in Kyunggi Province
Journal of Sericultural and Entomological Science, volume 32, issue 1, 1990, Pages 5~7
Soil chemical properties of 60 mulberry fields from 29 farms in Kyunggi Province were analyzed. The results were: 1. Average soil pH was 5.52: organic matter, 1.74%; available phosphorus, 572ppm; and exchangeable potassium, 0.62me/100g. Values for available P and pH were greater than data collected in 1983, especially for available P which was four times the value obtained in 1982. 2. Ninety two percent of mulberry fields required lime (less than pH 6.5), 90% had low organic matter content (less than 3.0%), 22% were low in K, and 15% were low in P (less than 0.5me/100g and 200ppm, respectively). However, 50% of the fields had greater than 200ppm P. The maximum concentration of P found was 2117ppm. 3. These results suggest that the amount of phosphate applied annually may be readjusted in standard fertilizer and in three-nutrient fertilizers for mulberry fields.
Studies on Heterosis Selective Index, Genetic Advance and Selective Efficiency for some Characters in Silkworm Breeding
Journal of Sericultural and Entomological Science, volume 32, issue 1, 1990, Pages 8~16
The experiment was conducted to obtain estimates of heterosis, selective index, genetic advance and selective efficiency in cross among silkworm varieties. Seven parents, 21 F
hybrids, and 21 F
populaltions from diallel crosses among them were evaluated. The results obtained are summarized as follows: In male and female of F
generation, the negative heterosis was shown in two characters of fifth instar period and boiling on ratio, and the positive heterosis with the value of 20.90-37.60% in the other characters. In those of F
, the nagative heterosis was shown in two characters of cocoon layer ratio and boiling off ratio, and the positive heterosis in the other characters. The selection weight of cocoon weight for bave weight was the highest of those of all the characters, and that of the combination of the fifth instar period and cocoon weight for it was the highest of those of all the combination. The genetic advance of cocoon weight toward bave weight was the highest of all the characters. The highest genetic advance and selective efficiency were shown in the combination of all the characters.
Classification and Selection of the Breeding Materials in the Silkworm, Bombyx mori, by Multivariate Analysis 2. Combining Ability and its Pre-estimate for the Top Cross Set made from the Silkworm Parental Lines Selected by Principal Component Analysis.
Journal of Sericultural and Entomological Science, volume 32, issue 1, 1990, Pages 17~30
4 top-cross set was made from the ten silkworm parental lines selected by the first principal component scores. They were also analysed for the relationship between the combining ability and the first principal component score. The highest general combining ability effects were detected in the parental lines of Japanese, N39 and chinese, C46, for the most quantitative characters in the study. The first principal component score of factors related to silk productivity in the parents was significantly and positively correlated to the general combining ability of the twelve characters such as cocoon yield, cocoon weight, cocoon shell weight, cocoon shell percentage, duration of the 5th instar larvae, total larval period, length of a bave, weight of a have, non-breaking length of a bave, non-breaking weight of a have, raw silk percentage, and neatness. Similarity distance (D
) was related to the specific combining ability of the characters such as cocoon yield, non-breaking length of a bave, non-breaking weight of a have, non-breaking ratio of a bave, raw silk percentage, neatness. From the results, it is possible to predict the general combining ability effects by the principal component scores for the 12 characters of the parents related to silk productivity.
Induction and Characterization of Precocious Trimolting Silkworm, Bombyx mori
Journal of Sericultural and Entomological Science, volume 32, issue 1, 1990, Pages 31~37
For fine-denier cocoon filament production, the precocious trimolting silkworms were induced by the treatments with both the imidazole compound "KK-42" hating anti-juvenile hormone activity and high temperature, and their growth, dietary efficiency, cocoon and cocoon filament qualities were compared with those of normal tetramolters as control. 1. The percentage of precocious trimolters was higher in the application of KK-42 than the treatment of high temperature. The effective concentration of KK-42 was 10
/1arva. The high temperature treatment for 48 hour was more effective than 36 hour treatment, and silkworm larvae fed on mulberry leaves were more sensitive than artificial diet to induce trimolters. 2. The larval duration of the trimolters induced by KK-42 was 5.17 day shorter than that of normal tetramolters in mulberry leaves rearing, and the increasing pattern of body weight in the 4th inster larvae of trimotlers was similar to the 5th instar larvae of normal tetramolters. 3. The qualities such as cocoon weight, cocoon layer weight and cocoon layer ratio of precocious trimolter induced by KK-42 were much lower those of normal tetramolters: the cocoon weight and cocoon layer ratio were 0.78g, 14.2cg and 18.4% in mulberry leaves rearing, and 0.86 cg, 10.3cg and 12.3% in artificial diet rearing, respectively. 4. The size of cocoon and cocoon filament was smaller in the precocious trimolter, both KK-42 and high temperature, as compared with that of the normal tetramolters. 5. The efficiency of cocoon layer production of the precocious trimolters by the KK-42 was lower than that of the normal tetramolters: amount of the cocoon layer production per 1g of dry mulberry leaves ingested was 7.97cg in the precocious trimotors, while 9.20cg in the normal tetramolters.
Effect of 3-Indole Butyric Acid (3IBA) on the Polyvoltine Silkworm, the Pure Mysore Breed of Bombyx mori L.
Magadum, S.B. ; Hooli, M.A. ;
Journal of Sericultural and Entomological Science, volume 32, issue 1, 1990, Pages 38~43
Effects of topical application of 100, 200 and 300ng/
of 3-indole butyric acid (3IBA) on larval parameters were studied in polyvoltine Pure Mysore breed of B. mori. Each concentration was administered independently, at 36h to III, IV ＆ V instars, at 48h to IV ＆ V instars, and at 72h to V instar larvae. Of the various dosages used, the repeated applications of loons of 3-IBA at 36h to III, IV ＆ V instars resulted in a significant increase in larval weight, silk gland weight, cocoon shell weight and fecundity and a significant decrease in larval duration and cocooning percentage when compared with the corresponding parameters of the untreated controls.
Preparation Monoclonal Antibodies against Bombyx Densonucleosis Virus Type II(Yamanashi isolate)
Journal of Sericultural and Entomological Science, volume 32, issue 1, 1990, Pages 44~48
Monoclonal antibodies were prepared against Bombyx densonucleosis virus type-II(Yamanashi isolate). Four hybridoma clones, named C4, Fl, H2, M9 were only reacted with the DNV-II, but those were not reacted with Bombyx densonucleosis virus type-I(Ina isolate) and infectious flacherie virus(IFV) by double diffusion test in 0.8% agarose gel. C4, Fl and M9 of them were reacted with 53KDa polypeptide of DNV-II, and H2 was reacted with 46. 5KDa polypeptide of the virus.
Electron Microscopic Observations on the tissues infected with Nuclear Polyhedosis Virus of Bombyx mori during eary stage
Journal of Sericultural and Entomological Science, volume 32, issue 1, 1990, Pages 49~57
To investigate the pathway of Nuclear Polyhedrosis Virus(NPV) of Bombyx mori in early stage infection of 2nd instar larva, the larval tissues were observed under electron microscope at interval of 6, 12, 24, and 48 hours after virus inoculation. The results are as follows. 1. The intact and enveloped nucleocapsids released from the polyhedra protein in the gut lumen apparently entered with the microvilli. 2. Virus progenies were observed in columnar cell nuclei 24 hours after inoculation, but polyhedra was not seen. The enveloped virus was observed in some of the intercellular spaces between mid-gut cells. 3. Many enveloped virus particles appeared in the basement membrane. These enveloped virus particles passed the basement membrane and gathered at blood cells in heomocoeal. 4. The NPV muliplicates in nuclei of the blood cells and the tracheal cells normally
Studies on the Sorption and Permeation of Acid dyes through Silk fibroin Membrane(III) -Permeation of Acid dyes through the Silk fibroin Membrane-
Do gyu Bae ; Tae moon Tak ;
Journal of Sericultural and Entomological Science, volume 32, issue 1, 1990, Pages 58~67
Survey of Colorfastness of Korean Silk Fabrics
G. Freddi ;
Journal of Sericultural and Entomological Science, volume 32, issue 1, 1990, Pages 68~72
The color fastness of Korean silk fabrics was measured in this investigation. The sample fabrics under examination were divided into four groups, according to the processing cycle: 1) Plain dyeing(A-C) : 2) Yarn dyeing(D;E=Knitted fabric) ; 3) Direct printing(F-H) ; 4) Discharge Printing(I-P) : The following result can be obtained. Among the samples examined, both the plain-dyed(brilliant colours) and discharge-printed (put-in colours) fabrics show lower values of water, perspiration and ironing color fastness compared with those recommended by International Organization for Standardization(I. S. O.)