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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 24, Issue 1 - Sep 1982
Volume 23, Issue 2 - Feb 1982
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Studies on tile Resources for the Artificial Diet and Feeding Response of the Silkworm, Bombyx mori
Journal of Sericultural and Entomological Science, volume 23, issue 2, 1982, Pages 11~36
Forty-nine plant species as additives to silkworm artificial diet and 5 species as cellulose sources for artificial diet were screened for their economic values as feed-resources for the silkworm. Feeding response to artificial diet was tested on 82 silkworm strains. The effect of rearing conditions on feeding response and enzyme activities in the silkworm was investigated. The results were summarized as follows. 1. Seven species out of 49, Vigna sinensis ENDL, Ipomoea vatatas Lamarck, Cyperus anuricus Var. Laxus, Alnus japonica Stendel, Trifolium repens L, Prunus serrulata Lindley. Var, Glycine max L increased feeding response, compared with the basic formula of artificial diet. 2. The economic values of Vigna sinensis ENDL, Ipomoea vatatas Lamarck, Cyperus anuricus Var. Laxus, Ainus japonica Stendel, Cassia tera L, Erigeron canedensis L as feed-resources for artificiale diet were recognized, through feeding experiment during the entire larval stage. 3. Mulberry cellulose showed the best results in rearing and cocoon characteristics. 4. The extent of feeding response varied according to strains and varieties. Varieties in japanese strains showed higher feeding response than those in chinese and european varieties, with considerable variations among a varieties in strains. 5. The begining of 4th instar seems to be a proper time to convert from mulberry to artificial diet, or artificial diet to mulberry, however the middle of 3rd instar seems acceptable. 6. The optimum temperature for artificial diet rearing is 30
during the period of 1st-3rd instar and 28
for 4th-5th instar. 7. Electrophoretic isozyme patterns of esterase and acid phosphatase on agarose gel, as affected by strain. rearing temperature and feed-resources, were observed as follow. (1) Isozyme patterns of mid-gut esterase varied, depending on instar. One or two more isozyme bands were observed in the larvae than feed on the mulberry fed for the artificial diet. (2) A strain, chinese-15 with a higher feeding response, had 1∼2 more bands than chinese-60 with a lower feeding response. (3) Five bands of mid-gut esterase in 3rd and 4th instar larvae reared at 28
. and 4 for 3rd instar and 6∼7 for 4th instar larvae at 35
were observed. (4) No similar esterase bands could be found among mid-gut, blood and silkgland. There are five esterase bands in the midgut, one in blood and three in silkgland. (5) There was rather small digerence in acid phosphatase types of mid-gut and blood according to varieties and rearing temperature. No active band was shown in silkgland. In midgut, there was one acid phosphatase band at 3rd instar, two at 4th instar and three at 5th instar. In blood, one active band at 3rd or 4th instar and three bands at 5th inster wire detected.
Studies on the Effects of various Levels of Protein in the Artificial Diet on Nutritional Physiology of the Silkworm, Bombyx mori
Journal of Sericultural and Entomological Science, volume 23, issue 2, 1982, Pages 37~49
Larvae of the silkworm (Bombyx mori L.) were reared during the 5th instar on the four kinds of artificial diets on the basis of the different amounts of soybean meal used as the protein source. In this experiment it was shown that the various levels of protein in the diet affected not only the growth and silk production but the digestibility of the diet. haemolymph protein and uric acid excretion. The results obtained are summarized as follows; 1. By an increase of the level of protein in the diet the apparant digestibility was increased. but the protein digestibility was comparatively decreased. 2. Larval body weight increment was not observed by the 3rd day of the 5th instar, but was increased from the 4th day as the level of protein was increased in the diet. 3. After the 3rd day of the 5th instar, protein content in the hemolymph was increased steeply by an increase of the protein content in the diet. However, the percentage of hemolymph protein to the ingested protein was decreased from the 2nd day of the 5th instar and increased more or less after the 4th day. 4. An increase of the uric acid excretion was observed as the content of protein in the diet was increased but the pattern of the uric acid excretion was different between high and low-protein diet. However, the percentage of the uric acid excretion to the ingested protein and to the hemolymph protein were both decreased steeply after the 2nd day of the 5th instar. 5. It was also evident that the high-protein diet increased the cocoon productivity. 6. It showed that the feed efficiency for body weight increment and silk formation was high by an increase of the level of protein in the diet, but the protein efficiency was not.
Investigation of Sericultural Foundations in Yuyu Village Located in Sanne myun, Buan gun, Jeonbuk I. About Some Chemical Characteristics of Soil and Fertilizer Rate applied on Mulberry Field
Journal of Sericultural and Entomological Science, volume 23, issue 2, 1982, Pages 50~54
This investigation was conducted to know the present conditions of the the chemical components in the soils and chemical fertilizer rates applied in the Yuyu village located Sanne myun, Buan gun, Jeonbug province. Total silkworm rearing farms in this village were 54 and 47 of them were chosen at random. Average fertilizer rate applied in this village was 40.8-13.7-13.9kg/10a as N-P
O. Farmers seemed to stress too much to nitrogen fertilizer. Available P
5/ in soils was below 7ppm (by Bray No. 1 method). However, 47% of the farms applied phosphate fertilizer less than 11kg/10a. The average of exchangeable K in soils was 0.68me/100g. Nine of the farms applied potassium fertilizer more than 20kg/10a and 7 farms of them had the soils contained above 0.4me/100g as the potassium content. The average soil pH was 5.3. All of the soils were below than pH 6.5. Exchangeable Ca and Mg were 3.62 and 0.83me/100g, respectively. The average lime requirement was 269kg/10a. The average organic matter content was 2.55% and for 72% of the total farms, organic matter content was below than 3%.
A Survey on the Kinds of Leaf Rollers in Mulberry Trees
Im, Dae-Joon ; Paik, Hyun-Jun ;
Journal of Sericultural and Entomological Science, volume 23, issue 2, 1982, Pages 55~58
This survey was carried out at the Sericultural Experiment Station. Suweon to clarify the kinds of leaf rollers damaging mulberry leaves and determine the dominant species of them. The results obtained are as follow: 1. A total of seven species including 2 unrecorded species, Olethreutes hemiplaca MAYRICK. and Olethreutes doubledayana BARRET, were found as mulberry attacking leaf rollers. 2. The dominant species of mulberry leaf rollers in Korea was identified as O. hemiplaca M. followed by Adoxophyes orana B.