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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Sericultural and Entomological Science
Journal Basic Information
Journal DOI :
Korean Society of Sericultural Science
Editor in Chief :
Volume & Issues
Volume 29, Issue 2 - Oct 1987
Volume 29, Issue 1 - May 1987
Selecting the target year
Seasonal Changes of Chemical Components in Winter Buds of Several Mulberry Varieties
Journal of Sericultural and Entomological Science, volume 29, issue 1, 1987, Pages 1~6
Changes in water content, dry weight, total nitrogen (T-N), P, K, Ca, Mg, B, Fe, Cu, Zn and Mn and death rate were studied in winter buds of mulberry trees. Winter buds of the early season varieties, Hongolbbong and Chongolbbong, (Morus Lhou Koioz) and midseason varieties, Kaeryangbbong and Chongilbbong, (Morus alba L.) were sampled every 7 days from February 28 to April 28, 1986. The result were as follow : 1. Water content was increased by 20% over the level of 45% in late February. The water content in Chongolbbing was the highest, whereas that in the rest of the varieties was nearly equal. 2. Dry weights of winter buds of the early varieties were always greater than those of midseason varieties. The dry weight of buds of early season varieties began to increase in late February and increased rapidly after April 18. There was no weight gain until April 12 in buds of midseason varieties, followed by a slow increase thereafter. 3. T-N and P, K, B, Fe, Cu and Zn concentration increased with time, Mn decreased, and Ca and Mg levels were constant. 4. T-N and Mn levels were higher and P, Ca, Fe and Cu lower in Hongolbbong than in the other varieties. T-N, Mg and Cu levels were lower in Chongolbbong. 5. The death rate of winter buds increased with the approach of the budding season. The rate was highest in Chongolbbong and lowest in Hongolbbong.
Mulberry Yields under Several Planting Densities on Hilly Land
Journal of Sericultural and Entomological Science, volume 29, issue 1, 1987, Pages 7~11
The influence of planting density, on the mulberry yield, had been studied for 5 years period since 1982. For this purpose, a hilly land (15
) was selected and 5 planting density level (926, 1,667, 2,780 and 3,444 tree/10a) were used. Following results were obtained. 1. Vinyl mulching promoted 2 days earlier of green tip sprouting stage and 3 days earlier of shallow-bill stage, compared with the non-mulching. 2. It was shown that increase of the length of the branch with vinyl mulching and decrease of the mulching effect with the higher density of plants from, 2,780 tree/10a. 3. When the planting density was higher, length and width of leaf was decreased sharply, and chlorosis of the lower part of the branch was occured heavily. 4. With the higher planting density, number of branches per tree and average length of the branch was decreased. Number of shorter branch-normal branch ratio were increased. However, number of branches and total length of branch per area were shown opposite. 5. Yield of mulberry was increased for the peroid of 3 years after planting with the all the levels of planting density after that, yield increase was dully in 926 tree plot, and more dully in 1,677 trees plot, while decrease of the yield were showen with density of 2,780 and 3,444 trees plots. 6. The highest average yield for the 5 years were obtained from 2,780 trees plot, 46.6% higher than in 926 trees plot, followed 40% higher in 3,444 trees plot, and 29.9% higher in 1,667 trees plot. 7. Soil pH, organic matter, Ca and Mg decreased with cultivation, especially P2O5, pH, Ca and Mg in the density of more than 926 trees plot.
Effects of Climatic Conditions on Budding of Buds and Growth of Mulberry(Morus alba L.)
Journal of Sericultural and Entomological Science, volume 29, issue 1, 1987, Pages 12~19
This study was carried out to investigate the effects of climatic conditions on the budding of buds and the growth of shoots of mulberry (Morus alba L.) at Suwon for the period of six years from 1978 to 1983. The results are summarized as follows. 1. The period that influenced most greatly on mulberry budding and foliating of it's buds was from late part of March to middle part of April in the district of Suwon, Korea. 2. Temperatures in soil 20cm deep during the period from late part of March to middle part of April had high correlations with budding dates. 3. It was disclosed that the budding date had high correlations with the date of bud shaped swallow-bill (r=0.9861**), date of the third leaf(r=0.97**), and date of the fifth leaf(r=0.96**), respectively. 4. The higher the average temperature of April became, the longer the length of shoots became. 5. The earlier the budding date and foliating date came, the larger the leaf yield became. However, with excessive amount of precipitation after early budding and foliating, the leaf yield was not increased in proportional. 6. The longer the growing period of the shoots became, the larger the leaf yield became.
Studies on the Vitellogenin in the Silkworm, Bombyx mori, Reared with Mulberry Leaves and Artificial Diet
Yun, Hyeong-Ju ; Lee, Sang-Mong ; Mun, Jae-Yu ;
Journal of Sericultural and Entomological Science, volume 29, issue 1, 1987, Pages 20~30
In the hemolymph proteins of the silkworm reared with mulberry leaves and artificial diet, electrophoretic patterns of Storege Protein 1 (SP1) and Vitellogenin(VG), changes of relative concentration of SP1, JHA effects during the developmental stages, and estimation of the molecular weight of vitellin subunits were investigated in the present study. 1. Storage Protein 1 (SP1) showed female specificity from the middle stage of the fifth instar to the end of spinning stage in the silkworm reared with mulberry leaves and artificial diet. 2. Vitellogenin (VG) showed female specififcity just afrter pupation in the silkworm reared with mulberry leaves and artificial diet. 3. Storage Protein 2 (SP2) without female specificity was detected from the early stage of the fifth instar to the first or second day after pupation. 4. Vitellin was composed of two non-identical subunits (vitellin-heavy chain ; VTL-H, vitellinlight chain ; VTL-L) with mplecular weight of 186,000 and 41,000. Also, there were no differenes between the molecular weights of vitellin subunits obtained from silkworms reared with mulberry leaves and artificial diet. 5. Relative concentration of Storage Protein 1 (SP1) after topical application - 0.5, and 10
per body weight - JHA on the 60th hour of the fifth instar showed the highest increase with the treatment of 5
and a higher increase with the treatment of 10
compared with the control (no topical application of JHA).
Genetic Analysis of Boiling-off Ratio of Amount of Sericin and Fibroin of Cocoon Layer and from Diallel Crosses of Silkworm, Bombyx mori
Journal of Sericultural and Entomological Science, volume 29, issue 1, 1987, Pages 31~38
The genetic analysis was caried out on the boiling-off ratio of cocoon layer, and the amounts of sericin and fibroin in the F1 generation from the diallel crosses of silkworm. The result obtained were as follows : 1. Boiling-off ratio and the amounts of sericin adn fibroin in male and female were over dominqnce and partial dominance, respectively. 2. The additive effect of gene was higher then the dominance effect in the amounts of sericin and fibroin in male and female, and in boiling off ration in female. 3. The direction of dominance in the amounts of sericin and fibroin in male and female was positive and that in boiling off ratio negative. 4. The effect of three characters on the combining ability was significant and their general combining ability was higher than the specific combining ability.
Survey on the Incidence of Dwarf Disease (Mycoplasma-like organism) of Mulberry.
Kim, Yeong-Taek ; Baek, Jun-Hwan ; Lee, Jae-Chang ;
Journal of Sericultural and Entomological Science, volume 29, issue 1, 1987, Pages 39~47
The incidence of mulberry dwarf disease was surveyed on seventy two cocoon producing areas throughout the country from 1983 to 1984. There was a low tendency of incidence in Gyeonggi, Gangwon and Chungbuk, the northern parts of 37 degrees north latitude. However, in Chungnam and Gyeongnam, was a relatively high incidence observed. The most severe incidence areas of mulberry dwarf disease were found in Jeonnam, Jeonbuk and Gyeongbuk.
Survey for Plant Parasitic Nematodes in Mulberry Fields
Baek, Hyeon-Jun ; Han, Sang-Chan ; Kim, Yeong-Taek ;
Journal of Sericultural and Entomological Science, volume 29, issue 1, 1987, Pages 48~52
The fauna and the distribution of plant parasitic namatodes were investigated by smapling about five hundred grams of soil around roots of mulberry trees from 929 mulberry fields in Korea. Of fourteen genera detected on mulberry fields, Paratylenchus aciculus, P. projectus, P. morius, Helicotylenchus dihystera, Meloidogyne arenaria were found to be parasitic to mulberry. Among them Paratylenchus species were the most abundant in mulberry fields, but Tylenchorhynchus sp., Aphelenchus sp., Helicotylenchus sp., and Meloidogyne sp. were also observed in high frequency. Meloidogyne species were observed in high frequency in Jeonbuk, Gyeonggi and Jeonnam, Helicotylenchus sp., in Gyeongnam and Gyeonggi, Xiphinema sp., in Jeonbuk and Jeonnam, and Paratylenchus sp., in Gyeonggi, Gyeongbuk, Gyeongnam, and Jeonnam. The growth of mulberry was poor as the increase of density of Paratylenchus sp.
Effects of Some Nematicides on the Control of Root-knot Nematode in Mulberry Tree
Journal of Sericultural and Entomological Science, volume 29, issue 1, 1987, Pages 53~56
The effect of nematicides on root-knot nematode were investigated in the mulberry nursery farm of Jeonnam province from 1985 to 1986. The nematicides applied were Fenamiphos, D-D(92%), Aldicarb, D-D(55%), Ethoprop and Carofuran. The control effects of nematicides used were similar in two years (1985 and 1986). The Fenamiphos and D-D(92%) both were a highly effective than any of Aldicarb, D-D (55%) and Ethoprop, Carbofuran. Mulberry sampling showed good growth when the above nematicides were applied.
Comparative Degumming Effects of Detergents on Silk Twill
Journal of Sericultural and Entomological Science, volume 29, issue 1, 1987, Pages 57~63
Analyses for Identification of Methacrylamide Graft-Polymerized Silk
Journal of Sericultural and Entomological Science, volume 29, issue 1, 1987, Pages 64~68