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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
International Journal of Industrial Entomology
Journal Basic Information
Journal DOI :
Korean Society of Sericultural Science
Editor in Chief :
Volume & Issues
Volume 13, Issue 2 - Dec 2006
Volume 13, Issue 1 - Sep 2006
Volume 12, Issue 2 - Jun 2006
Volume 12, Issue 1 - Mar 2006
Selecting the target year
Present Situation and Prospects of Sericulture in China
Shen, Xing-Jia ; Ye, Xia-Yu ; Guo, Xi-Jie ;
International Journal of Industrial Entomology, volume 13, issue 2, 2006, Pages 51~55
Since 1970, China has become the biggest cocoon producer in the world, and made the highest historical record of cocoon output for 759,800 tons in 1995. However, in 1996 cocoon production reduced sharply to 470,900 tons. After a ten-year adjustment and reform, sericultural areas have shifted from developed regions to developing regions and from the east to the west. From 2000, the cocoon output has started to increase restoringly. By 2004 it recovered to 547,091 tons. With the development of market economy, sericulture management has been changed, including mulberry fields concentrated to the specializated households and cooperatives, cocoons produced in larger scale instead of individuals, Silkworm egg producing enterprises gradually changed into non-governmental joint-stock ones. The mechanism of market cocoon price has been gradually established. The management model of combination of trade, industry and agriculture is pushing and improving. It is the fruit of modern science and technology, especially sericultural basic research, that provides China's sericulture with the opportunity and vital force. China's sericulture, therefore, will continue to develop steadily in future.
Isolation and Culture of Entomopathogenic Fungus, Cordyceps sphecocephala
Nam, Sung-Hee ; Li, Chun-Ru ; Hong, In-Pyo ; Sung, Kyu-Byoung ; Kang, Seok-Woo ; Fan, Mei-Zhen ; Li, Zeng-Zhi ;
International Journal of Industrial Entomology, volume 13, issue 2, 2006, Pages 57~61
In this study, morphology of perithecia, asci, ascospores, etc. of C. sphecocephala were examined for its telemorphic characteristics. Its colony grew up to 32 mm in diameter on potato dextrose agar (PDA) for 30 days under the condition of
. PDBLA and PDBAA media were selected as optimal media for C. sphecocephala, on which the growth was 1.5 times as fast as on PDA medium. Moreover, PDBLA medium induced successfully the synnemata of anamorphic state. C. sphecocephala was able to be proliferated in vitro on both larva and adult of honeybee drone as its substrate. After inoculated onto the drone larva, it produced mycelium at
, with the maximum yield up to
An Improved Method of Parthenogenetic Development and Analysis of Combining Ability in Bivoltine Breeds of the Silkworm, Bombyx mori L.
Gangopadhyay, D. ; Singh, Ravindra ;
International Journal of Industrial Entomology, volume 13, issue 2, 2006, Pages 63~72
Parthenogenesis, the development of unfertilized ovum opens new perspectives in silkworm breeding in the development of homozygous breeds. In order to improve induction of artificial parthenogenesis in the excised unfertilized eggs of different breeds of the silkworm, Bombyx mori L., a new method was devised and the results were compared with the routine method. General and specific combining abilities and hybrid vigour of newly developed bivoltine breeds were analyzed utilizing bivoltine breeds viz.,
Estimation of GCA revealed superiority of the breeds,
for eight characters followed by
for five characters. Among the testers,
was found good general combiner for seven characters followed by
for four characters. A great deal of variations was observed among the hybrids studied. Five hybrids namely,
showed significant SCA effects for 5-6 characters. The hybrid,
showed its superiority by expressing significant hybrid vigour over BPV for 7 characters. Majority of the hybrids exhibited significant hybrid vigour for survival rate, yield/10,000 larvae by weight, cocoon weight, cocoon shell weight, filament length and denier.
Estimation of Heterosis and Combining Ability in Hybrids between Resistant and Susceptible Bivoltine Breeds of Silkworm Bombyx mori to Densonucleosis Virus1 (BmDNV1)
Rao, P. Sudhakara ; Nataraju B. ; Balavenkatasubbaiah M. ; Dandin S.B. ;
International Journal of Industrial Entomology, volume 13, issue 2, 2006, Pages 73~77
Combining ability and hybrid vigour analysis was carried out in hybrids between newly developed non-susceptible lines to BmDNV1 and popular bivoltine breeds for certain quantitative traits viz. Pupation rate, Cocoon yield, Cocoon weight, Cocoon shell weight and Cocoon shell ratio, Survival rate against BmIFV and BmNPV. General combining ability (GCA) effects revealed that among the lines CSR2DR was found good general combiner exhibiting significant GCA effects for six characters, out of seven traits evaluated. Among testers CSR28DR was found as good combiner exhibiting significant GCA effects for six traits. Out of 36 hybrids made between
breeds, one hybrid
exhibited significant SCA effects for six traits. The selected hybrid
also exhibited significant positive heterosis and heterobeltiosis expressions for maximum traits and could be exploited as commercial silkworm hybrid resistant to important viral diseases.
Hemocyte Changes after the Extirpation of the Hemopoietic Organ-wing Disc Complexes in the Silkworm, Bombyx mori (Lepidoptera: Bombycidae)
Zhou, Qing-Xiang ; Shen, Xing-Jia ; Yi, Yong-Zhu ; Xia, Ai-Hua ; Zhang, Zhi-Fang ;
International Journal of Industrial Entomology, volume 13, issue 2, 2006, Pages 79~83
We successfully extirpated all four hemopoietic organ-wing disc complexes of the fifth instar larvae of Bombyx mori, and found that most of the treated silkworms could still develop into the moths. We investigated the changes of the circulating hemocytes and evaluated the effects of extirpation on the hemopoiesis. The results showed that proliferation of circulating hemocytes was sufficient to allow development of the silkworms which complexes were totally extirpated. We also found that hemopoietic organ-wing disc complexes extirpation might cause a certain hemopoietic compensation of the remainder complexes during early spinning. Exogenous hormones such as
and juvenile hormone analog had a positive effect on hemocytes proliferation.
Preliminary Report on the Breeding of Robust and Resistant-NPV and High Quality Silkworm Race 'Shengming No.1' for Summer-autumn Rearing
Zhao, Yuan ; Chen, Kepin ; Yao, Qing ; Wu, Yang-Chun ; Zhang, Jian ; Guo, Xijie ;
International Journal of Industrial Entomology, volume 13, issue 2, 2006, Pages 85~95
Seveval Chinese and Japanese varieties with good characters were used in the breeding. After 5 years (15 generations), a pair of robust and high quality silkworm variety with NPV resistance was bred by means of a combination of crossing and pedigree selection complemented by the selection of NPV resistance. The variety was identified jointly nationwide in 2003 and 2004, and appraised by National Mulberry and Silkworm Appraising Committee. Results are as follows: its cocooning rate is over 93%, shell rate 23-25%, filament length 1200-1300 meters, reelability 75-88%, Length of non-broken cocoon filament 900-1100 meters, raw silk rate 17-19%, neatness 95-97 points, and cocoon crop, cocoon shell weight and raw silk weight per 10000 larvae is higher than those of the control variety by 7-10%, 14-19% and 14-18%, respectively. The variety is not only robust, resistant to high temperature and NPV, easy to rear, uniform in hatching, molting and maturing, but also lays more eggs, and its fecundity is high. It is suitable to rear in the Yangtze River Basin, the Yellow River basin and the Pearl River basin of China.
Efficacy of Wood Ash as an Antiviral Agent against Cytoplasmic Polyhedrosis Virus of Tasar Silkworm, Antheraea mylitta D.
Singh, G.P. ; Roy, D.K. ; Sahay, Alok ; Suryanarayana, N. ;
International Journal of Industrial Entomology, volume 13, issue 2, 2006, Pages 97~101
The efficacy of wood ash from Terminalia arjuna (arjun) and T. tomentosa (asan) has been tested against virosis of tasar silkworm, Antheraea. mylitta D. The Polyhedral Occlusion Bodies (POBs) of Cytoplasmic Polyhedrosis Virus of A. mylitta (AmCPV) were exposed to the aqueous solution (0.5 to 4%) of wood ash for 5 to 30 minutes. The treated suspension of POBs was orally inoculated once to tasar silkworm larvae after 24 hours of
moult, and larvae reared in indoor on arjun leaves till spinning. The application of aqueous solution of wood ash has established its potential as antiviral agent against cytoplasmic polyhedrosis virus. Two percent aqueous solution of wood ash from arjun and asan dissolved the Polyhedral Occlusion Bodies (POBs) of cytoplasmic polyhedrosis virus of tasar silkworm and inactivated the virions within a short period of 20 to 30 minutes. In vivo efficacy of aqueous solution of wood ash resulted in reduction of larval mortality due to virosis. The mortality was reduced to
when treatment of 2.0% solution of wood ash of arjun and asan respectively were applied for 20 minutes, compared to inoculated control
. No mortality was recorded when treatment of 2.5% solution of wood ash of arjun and asan were applied for 10 minutes or more.
Effect of Medicinal Plant Extracts on Mealy Bugs (Maconellicoccus hirsutus Green) Affecting Mulberry
Govindaiah, Govindaiah ; Gayathri, M.C. ; Nagaveni, V. ;
International Journal of Industrial Entomology, volume 13, issue 2, 2006, Pages 103~108
Efficacy of aqueous leaf extracts of medicinal plants viz., Eucalyptus globulus, Ocimum sanctum and Piper betle were evaluated against the hatching of eggs, mortality of nymphs and mortality and fecundity of adult mealy bugs (Maconellicoccus hirsutus Green) under in vitro conditions. Totally seven concentrations 1, 5, 10, 20, 50, 70 and 100 percent were tested against mealy bugs. The results revealed that with the increase in the concentration of extracts, there was a corresponding decrease in hatching, nymphal & adult mortality and fecundity in all the extracts tested. The hatching of eggs was minimum at 100 percent concentration in E. globulus (20.00%) followed by O. sanctum (30.42%) and P. betle (36.06%) over control (96.73%). The growth and development of nymphs and adults were adversely affected after the treatment. The nymphs did not attain the adult stage and there was total mortality of nymphs in different treatments. The duration of nymphal stage was reduced by 2-10 days in E. globulus, 1-7 days in O. sanctum and 1-2days P. betle at higher concentrations. However, at lower concentrations it was prolonged by 2-4 days in all the three extracts. At lower concentrations the mortality of adults was on par with the control. Similarly the adult duration was also reduced by 3-4 days at 100 percent concentration and prolonged by 5-6 days at lower concentrations in all the extracts. With the increase in concentrations of the extracts there was decrease in the fecundity of eggs. Thus, the leaf extracts of E. globulus was found to be most effective followed by O. sanctum and P. betle against mealy bugs.
Identification of Productive Mulberry Silkworm Hybrids Resistant to Densonucleosis Virus Type 1 (BmDNV1)
Rao, P. Sudhakara ; Nataraju B. ; Balavenkatasubbaiah M. ; Dandin S.B. ;
International Journal of Industrial Entomology, volume 13, issue 2, 2006, Pages 109~112
The use of commercial silkworm hybrids resistant to important silkworm diseases is economical and better option particularly in tropical areas. This necessitated the evolution of productive bivoltine silkworm breeds non-susceptible to
. Non-susceptibility to
, infection was found to be controlled by a single recessive gene, nsd-l or a dominant gene, Nid-l. A major dominant/recessive gene confers resistance to
, from potent donor parents have been transferred to 10 productive but susceptible bivoltine silkworm strains through conventional breeding methods. By utilizing these breeds prepared 25 hybrids
and hybrid evaluation was carried out to identify most promising hybrids resistant to
. All these hybrids are inoculated with
inoculum along with productive control hybrid
and reared under standard rearing procedure. Based on inoculated rearing and test reeling results, two most promising hybrids
were selected for commercial exploitation. The selected hybrids have shown a survival rate of >85% with productive traits, where as control hybrid have shown 11.1% survival with inferior cocoon traits. The methodologies adopted were discussed.
Preliminary Studies on the Role of
Isozymes in Quantitative Traits of Two Multivoltine Silkworm (Bombyx mori L.) Races and their
Kumaresan P. ; Somasundaram P. ; Kumar K. Ashok ; Urs S. Raje ;
International Journal of Industrial Entomology, volume 13, issue 2, 2006, Pages 113~117
Heterosis was studied involving two multivoltine silkworm breeds viz, APM1 and SLKSPM through rearing and isozyme analysis. A positive significant heterotic effect was observed in fecundity, hatching % and survivability. The heterobeltiosis was observed only in fecundity and hatching %. Isozyme analysis of
showed variation in loci and allelic expression. The allele with heterozygosity
was observed at the Est-2 locus in
progeny. Est-3 was observed in
progeny, whereas it was completely absent in both parental lines. The present study suggests that the markers (
and Est-3) targeted for introgression may be useful for the improvement of fecundity and survivability as the phenomenon of heterosis was observed only in
Efficacy of Selenium on Silkworm (Bombyx mori L.) Cocoon Characters
Smitha S. ; Kumar K. Anil ; Rao, A. Vijaya Bhaskara ;
International Journal of Industrial Entomology, volume 13, issue 2, 2006, Pages 119~122
As the Selenium is known to be growth promoter in sheep and cattle, the efficacy of selenium has been tested in silkworm Bombyx mori L. The V instar larvae were fed with lethal and sub-lethal doses of selenium treated leaves. The larvae fed with lethal dose showed a significant decrease in growth and Cocoon commercial characters. The treatment with sub lethal dose exhibited a significant increase in the growth of the silkworm. Correspondingly, the cocoon commercial characters on exposure to the lethal dose showed significant decrease and sub lethal dose showed a significant increase. In the light of similar findings reported earlier in other cocoon crops and vertebrates, it can be inferred that selenium at lower doses acts as a growth stimulator, resulting in the higher yield of cocoon crop.