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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 40, Issue 2 - Dec 1998
Volume 40, Issue 1 - Jun 1998
Selecting the target year
Morphological and Chemical Characteristics of Mulberry(Morus) Fruit with Varietes
Lee, Hui-Wan ; Sin, Dong-Hwa ; Lee, Wan-Ju ;
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 1~7
The morphological and chemical characteristics of leaves and fruits were observed in the three mulberry varieties, including Daeryugppong(Morus Lhou(Ser.) koidz), Kugsang 20(Morus Lhou(Ser.) koidz) and Cataneo(Morus alba L.). The leaf development in spring was earliest in Cataneo and latest in Kugsang. Content of total nitrogen and Mg in leaf was the highest in Cataneo while that of P2O5, K and Ca in Daeryukppong. Flowers started to bloom from May 8 and in full bloom around May 15. Mature fruits began to set from June 10 to 15 and lasted by July 10 in Cataneo. Average fruit weight was heaviest in Kugsang 20(3.52 g/fruit), while lowest in Daeryukppong(1.61 g/fruit). In fruits, glucose and fructose were the major sugars. Citric acid was the most abundant organic acid in three varieties with its average content from 0.8 to 0.14%. The major pigment in fruit was anthocyanin and its content varied among varieties. The stability of anthocyanin was evaluated under various pH, temperature, and sugar concentrations. Rutin was the major flavonol glycoside present in fruits and its content varied from 0.92 to 3.36 mg/gDW. Other flavonol glycosides such as isoquercitrin and quercitrin were also detected in fruit.
Study on Development of the Riding-type Mulberry Harvester
Choe, Yeong-Cheol ; Im, Su-Ho ; An, Jang-Sik ;
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 8~12
The study aimed at development of a riding-type mulberry harvester for mechanical harvest. A riding-type mulberry harvester has been developed to harvest on sloped land with a higher efficiency. It has been implemented over a period of 2 years from 1996 to 1997. The result is as follows. It moves on carterpillar with a level adjusting system. It reduced only from 14.6 hrs to 0.9hrs/10a for cutting in a range of 25 to 80 cm high and possibly used for both spring and autumn. It reduced only the labor requirements of mulberry harvesting by 94 percent, as compared to that of the manual harvest. All related processes, cutting, binding and loading are simultaneously done by this harvester and totally it can reduce 96 percent of the labor requirements, as compared to 20.4 hrs/10a of the manual harvest. The machine compared to improved mulberry harvest efficiency with 11.11a per hour by about 23 times as compared to 0.49a per hour manpower. Cost analysis indicated that the riding-type mulberry harvester saved overall cost by 66 percent from 980,000 won per ha manpower to 330,000 won per ha.
Varietal Comparison of
-Aminnobutyric acid Content in Mulberry Root Bark
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 13~16
From mulberry root bark of 13 various varieties,
-Aminnobutyric acid(GABA) contents were examined on HPLC analyzer. GABA contents in mulberry root bark were affected by genotypes. Average GABA content of the 13 mulberry varieties was 2.19 mg/gDW. GABA content of the varieties ranged from 1.70 to 2.62 mg/gDW. Among the three genotypes, GABA content of the Morus Lhou was higher than the other genotype. In GABA content Hongolppong was the highest with 2.62 mg/gDW on the 13 varieties of mulberry root bark.
Effect of Mulberry Leaf Tea for the Removal on Cd and Pb in drinking water
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 17~22
To investigate the detoxificative effect of tea, five kinds of tea(mulberry, anaerobic treated mulberry, green, barly tea and corm tea) were selected and determined their dotoxication activities for Cd and Pb in drinking water. The effect of tea on the removal of Cd and Pb were increased proportionally to the contents of teas. Anaerobic treated mulberry leaf tea showed stronger detoxication activity than the others. In drinking water contaminated with Cd, the removal effect of Cd was high 27% by anaerobic treated mulberry leaf tea and 14% by mulberry leaf tea as compared to green tea. Also, in drinking water with Pb, the removal effect of anaerobic treated mulberry leaf tea was the best among five kinds of tea. Pretreatment method on the removal effect of Cd was better than post-treatment method in the treatment method.
Effect of Exposing Eggs of Uzi Fly, Exorista bombycis (Louis) (Diptera : Tachinidae) to Volatiles of Allium sativum L. (Liliaceae)
Narayanaswamy, K.C. ; Dandin, S.B. ;
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 23~26
Exposure of freshly laid eggs of Exorista bombycis (Louis) to volatiles emanating from bulbs of Allium sativum L. for different durations resulted in signigicant reduction in their hatchability. Maggots hatched from the eggs exposured for 64 h and 72 h were failed to emerge from host larvae. The duration of development stages of E. bombycis was prolonged besides reduction in rate of pupation and adult emergence as the egg exposure period increased. The findings are interpreted as the chronic effects of volatiles of garlic affecting maggots following developmental defects sustainable during embryonic development. The known major chemical components of A. sativum such as allicin, thioacrolein, ajoune, 2-propene sulfenic acid, 2-propene thiol and propylene were presumed to be responsible for the adverse consequences reported in this paper.
Biochemical Attributes of Mature Female Gonads of Different Strains and Hybrid of Mulberry Silkmoth, Bombyx mori L.(Lepidoptera : Bombycidae)
A.K. Saha ; A. Chaudhuri ; N. Krishnan ; A.K. Sengupta ; M. Shamsuddin ; S.K. Sen ; B. Saratchandra ;
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 27~32
One indigenous polyvoltine strain (Nistari) and two bivoltine strains viz. P5 and NB18 along with one bivoltine hybrid (P5
NB18) were subjected for studies on the differences on some physiologically important biomolecules like protein, nucleic acids and cholesterol. Ovarian protein and RNA content remained significantly high in the bivoltine races and their hybrid over multivoltine breed, while, DNA and cholesterol content remained significantly low in all the breeds and the hybrid as compared to Nistari strain. However, the ovarian weight was higher in both the bivoltine breeds and their hybrid than that of Nistari. Higher ovarian weight together with more protein and RNA concentrations reflect the preparatory phase for production of diapausing eggs by the bivoltine silknoths and their hybrid. The variations in biochemical parameters studied herein, thus establish a distinct difference in the overt reproductive physioiogy between multivoltine and bivoltine silkworms.
Sperm Transfer and Sperm Activation in Tasar Silkmoth, Antheraea Mylitta
G. Ravikumar ; H. Rajeswary ; N.G. Ojha ; S.S. Sinha ;
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 33~37
Two types of sperm, apyrene and eupyrene, are identified in A. mylitta. The sperm in the adult moth are motionless in seminal vesicles. At the time of ejaculation they received a secretion from male ejaculatory duct that renders them motile. The dissociation of eupyrene bundles, eupyrene sperm motility and the sequence of events of sperm migration in both sexes are described in the present paper.
Effect of Several Sericultural Products on Blood Glucose Lowering for Alloxan-induced Hyperglycemic Mice
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 38~42
This study designed to investigate the blood glusose lowering effect of sericultural products using allozan-induced byperglycemic mice. The administration of sericultural products did not affect body weight between normal mice and alloxan induced hyperglycemic mice. High blood glucose level in alloxan-induced mice group was maintained, during all the experimental period. In the 2-3 weeks, a significant decrease in the blood glucose level was observed in the group treated with sericultural products. Up to 5 weeks, blood glucose level of those group was maintained. Sericultural products treatment group have an activity for glucose tolerance test. Sericultural products showed the blood glucose lowering acivity for loading maltose and sucrose.
Pheontypic Characterization of Non-molting Mutants in Postembryonic Development of the Silkworm, Bomyx mori.
No, Si-Gap ; Seon, Hui-Suk ; Banno, Yutaka ;
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 43~51
Studies were carried out to investigate phenotypic expression, mortality and biochemical analysis of haemolymph proteins of nm-d, nm-f, nm-k and nmn bib-molting mutants of the silkworm, Bombyx mori. The non-molting mutants characters were expressed in the homozygote of each mutant genes. All strains of non-molting mutants were similar with each other in physiological characteristics, but the expression varied with each strains. The larvae of nm-d, nm-i and nmn died between day 5 and day 9 after hatching without the first molt. The nm-f and nm-k mutants died between day 5 and day 16 with a slight increase of body weight and, more than 90% of the mutants larvae died before the first molt and a few of them survived to the 2nd and the 3rd instar and died. The haemolymph protein components of nm-d, nm-i, and nmn were rapidly reduced, and on the other hand those of nm-f and nm-k consistently until they died. And there were no distinguishable difference in haemolymph components of non-molting mutants, as compared to those normals.
Construction of Recombinant Bombyx mori Nuclear Polyhedrosis Virus Using a FLP/FRT System of Yeast, Saccharomyces cerevisiae 2
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 52~59
For the construction of plasmid and bmNPV sarrying the FRT recognition site for the FLP recombinases, we synthesized the wild type FRT dligonucleotides. The target FRT sequences consist of three 13bp repeated DNA sequences; two repeats in a direct orientation and one inverted relative to the other two. In addition, there is an 8bp spacer region between the repeats which determune the orientation of the FRT recombination site. In order to place the FRT site both in target BmNPV genome and the transfer vector, we constructed a plasmid, FRT site both in the target BmNPv genome and the transfer vector, we constructed a plasmid, pFRT
-gal, carrying the FRT sites within the cloning sites of pSV vector and a recombinant BmNPV, vFRTPH, carrying the FRT sites at a downstream of polyhedrin promotor, respectively. In order to test the functionality of the FLP/FRT site-specific recombination system, vFRTPH, pFRT
-gal and pHsFLP DNA were co-transfected into BmN-4 cells. The resulting recombinant virus was designated a vFRT
2-gal. From construction analysis of the vFRT
2-gal with PCR technique it was concluded that the entire pFRT
-gal plasmid with
-galactosidase gene and origines of replication flanked by two functional hybrid FRT sequences. The efficiency of recombination was 8.7%, which was higher than that(2.2%) of recombination between a conventional transfer vector and the wild type BmNPV.
Transcription of Some Early and Late Genes of Bombyx mori Nuclear Polyhedrosis Virus in the Cells
Kim, Keun-Young ; Eun ;
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 60~62
To understand expression of some early and late genes of Bombyx mori nuclear polyhedrosis virus (BmNPV) in the B. mori-derived BmN cell line, the transcripts were analyzed by polymerase chain reaction with synthetic primers. After infection, the transcript of early genes, which include p35, IE1 and helicase p143, was immediately detected in the infected cells. In addition, the transcript of late genes, which include p10 and polyhedrin, was also detected in just-infected cells. In conclusion, our results revealed that transcripts of early and late genes of BmNPV are immediately expressed from the cells after infection.
Isolation and identification of Actinomycetes for the Control of Agricultual Pests and Fungal Pathogene
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 63~69
Twenty seven out of ca. 5,000 actinomycete strains, which were isolated from soil collected throughout the country, showed antibicrobial effects against fungai, Rhizopus stronifer (ATCC 6227a), Rhizoctonia solani (KCCM 11271) and yeast, Candida albicans (ATCC 10231). From these antifungal microorganisms, we further selected seven strains which seemed to produce insecticidal substances with in vivo test, using silkworm, Bombyx mori and beet armyworm, Spodoptera exigua. Morphological and biochemical experiments revealed that three strains out of seven were Streptomyces. Further investigations on the physical and chemical properties of these antifungal and insecticidal substances are now in progress.
Physical and Chemical Properties of Silk Fiber Treated with Calcium Nitrate
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 70~77
This study was carried out in order to find out the relationship between physical and chemical properties of silk fiber treated by concentrated calcium nitrate solution. The tensile, thermal and dynamic mechanical properties are also examined on Ca(NO3)2 treated silk fibers. The tensile properties of silk fibers treated by calcium nitrate changed with a concentration. The thermal behavior were also affected by the concentration of calcium nitrate. The degradation temperature (endotherms) and glass transition temperature shifted to lower temperature as the treated concentration increased. It is thought that the physical properties are strongly related to the structure and morphology of Ca(NO3)2 treated silk fibers. As a result, these give property changes with a concentration dependence.
A Study on the Silk Dyeing With Natural indigo Extracted from Polygoum tinctorium -On the fermentation dyeing-
Jeong, In-Mo ; Nam, Seong-U ;
Journal of Sericultural and Entomological Science, volume 40, issue 1, 1998, Pages 78~85
Colorants were prepared by extraction of natural indigo which was harvested just in the blooming season(in the late of July). 100 g of fresh leaves soaking in 1 ιwater was kept at 3
, 30 hours. A solution of 3g/l calcium hydroxide was added into it to precipitate dye substance and it was freezing-dried into powder form. The fermentation and dyeing conditions were investigated. The results obtained are summarized as follows; K/S value of dyed silk fabrics of fermentation conditions was higher at 95
for 20 min. than at 4
for 20 hours. Furthermore, K/S value of dyed silk fabric was raised by the addition of 5g/l of glucose and 5g/l of NaOH. K/S value of dyed silk fabric was raised by the addition of 5g/l of glucose and 5g/l of NaOH. K/S value increased as extending of dyeing time when dyed till 2 hours at 3
. K/S value decreased in order of 3
, at the various dyeing temperatures and dyeing concentrations, and colour fastness ranged from 4 to 5 grade in terms of washing, perspiration and light fastness.