• International Journal of Industrial Entomology and Biomaterials
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• 제9권1호
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• pp.73-78
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• 2004

The impact of low concentration fluoride on toxification was studied by treating $3^rd$ instar silkworm larvae of Qiufeng${\times}$Baiyu (Fluoride resistant strain) and Jinshong${\times}$Haoyue (Fluoride sensitive strain). The $5^th$ instar silkworm larvae of Zhenong-l, Shu-12, Qiufeng ${\times}$ Baiyu, Chunhua ${\times}$ Qhiushi, Jinshong and Haoyue were fed mulberry leaves treated with sodium fluoride at different concentrations to determine its effect on fecundity. Harmful effects of low concentration fluoride at early instars on growth, development and economic characters of Bombyx mori are related to its resistance. Harmful effect on resistant strain Qiufeng${\times}$Baiyu manifested on prolongation of instar duration of 15 and 6% in 70 ppm, where as the sensitive breed Jinshong${\times}$Haoyue manifested with 100% mortality in 50 ppm. The impact of low concentration fluoride on fecundity resulted in considerable increase in formed eggs (9%) and laid eggs (9%) in Zhenong-l and Shu-12 among treated population over control. The present observations emphasis that fluoride apart from exhibiting harmful effects on silkworm growth and development, however, its low concentration do playa vital role in inducing some positive effect on fecundity and cocoon traits.

• International Journal of Industrial Entomology and Biomaterials
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• 제6권2호
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• pp.183-190
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• 2003

An attempt was made to identify superior bivoltine silkworm hybrid suitable for monsoon and spring season of Uttar Pradesh. Breeds with superior cocoon characters and their more popularity in an area were major parameters on basis of which breeds from different regions were selected. Six bivoltine hybrids of silkworm (Bombyx mori L.) of different geographical regions were reared in monsoon (three hybrids) and spring season (three hybrids) during 2000-2002 i.e., for three years at Babasaheb Bhimrao Ambedkar University, Lucknow. Their performances were analyzed statistically for nine characters. The analysis made on a number of traits viz., hatching percentage, larval duration, pupation rate, yield /10000 larvae (by no.), yield /10000 larvae (by weight), cocoon weight, cocoon shell weight, cocoon shell ratio, showed the superiority of one bivoltine hybrid out of the three bivoltine hybrids studied in each season. $SH6{\times}{NB_4}{D_2}$ was found to be superior in major cocoon parameters in both the seasons i.e., monsoon and spring season of Uttar Pradesh.

• 한국잠사곤충학회지
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• 제24권1호
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• pp.25-27
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• 1982

보다 간편하고 효과적인 잠체소독약제 및 그 방법의 개발을 위해 Neo-PPS 훈증에 의한 잠체소독의 약해에 관한 시험을 실시한 결과는 다음과 같다. 1. 수견량에 미친 영향 춘잠기의 매일 2,4, 및 6시간 처리와 각령기 2회 6시간 처리 외에는 대조보다 좋거나 같은 수준으로 약해가 인정되지 않았다. 2. 화용비율에 미친 영향 춘잠기 매일 6시간 처리 외에는 대조보다 좋거나 같은 수준으로 약해가 인정되지 않았다. 3. 견층비율에 미친 영향 춘추잠기 어느 처리에서나 약해가 인정되지 않았다.

• International Journal of Industrial Entomology and Biomaterials
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• 제28권2호
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• pp.32-38
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• 2014

Food consumption and conversion efficiency of eri silkworm Samia ricini Donovan were studied during $4^{th}$ and $5^{th}$ larval instars by feeding castor leaves fortified with 100, 200, 300, 400 and 500 ppm concentrations of aqueous extracts of cyanobacteria Anabaena variabilis. The nutritional indices viz., ingesta, digesta, approximate digestibility (%), reference ratio and efficiency parameters like ECI and ECD were recorded which were significantly high at 400 ppm concentration treated batches of $4^{th}$ instar larvae over control batches. The decline in nutritional efficiency parameters of $5^{th}$ instar treated larvae might be due to higher utilization of the digested food for metabolic activities. Significant difference of ECI to cocoon % and non-significant difference of ECD to cocoon% and shell were observed between the treatments and control. Cyanabacteria feed supplement contains antibiotic and nutritions factors which has reflective effect on the biological parameters in eri silkworm and therefore has greater application in commercial eri silkworm rearing.

• 한국잠사곤충학회지
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• 제29권2호
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• pp.82-83
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• 1987

The number of chromosomes of the wild mulberry silkworm, Bombyx mandarina, collected in Suwon area in the middle part of Korean peninsula was investigated. The chromosomes were examined after smearing and squashing the testis of the last instar larvae which were at spining stage and the microscopic observation showed that the number of chromosomes of the wild mulberry silkworm was 27.

• 한국잠사곤충학회지
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• 제4권
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• pp.79-83
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• 1965

X-선을 잠란 잠아에 조사시켜 인위적으로 돌연변이를 다수유발시켜 다음과 같은 결과를 알았다. 1. 인위적 돌연변이 유발의 적정조사시간은 1∼1.5초의 범위였다. 2. X-선조사잠아의 대부분은 기형 불탈피잠 방사선병잠이었다. 3. 1963년도에 페니실린을 첨식시킨 누에에서 파채종한 차대에 X선을 조사시켰더니 괄목할 정도로 그 성적이 양호하였으며 실용형질개체도 다수발견되었다. 4. X선조사로서 인위적돌연변이를 유발시켜 잠품종개량이 가능할 것이며 앞으로 깊이 연구할 가치가 있는 분야이다.

• 생명과학회지
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• 제9권4호
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• pp.375-381
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• 1999

To evaluate the protective effects of extracts of silkworm on carbon tetrachloride-induced hepatotoxicity, serum glutamic-oxaloacetic transaminase, glutamic-pyruvic transaminase and lactic dehydrogenase activities, malondialdehydes values and glutathione-S-transferase activity were measured in ICR mice. Extracts of silkworm was administered orally at 30min after the administration of CCl4 Mice were sacrificed at 24h after the administration of extracts of silkworm. The activities of serum aminotransferase and the hepatic content of lipid peroxide after carbon tetrachloride treatment were markedly increased than normal control but those levels were decreased by the treatment of butanol soluble fraction of silkworm methanol extract. Glutathione S-transferase activity was decreased by carbontetrachloride than control, but also inhibited by the treatment of butanol soluble fraction of silkworm methanol extract.

• International Journal of Industrial Entomology and Biomaterials
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• 제2권2호
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• pp.119-122
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• 2001

Whether Bombyx mori nuclear polyhedrosis virus (BmNPV) can be transmitted to offspring, has been a noticeable question for a long time. When fifth instar larvae of the silkworm were orally inoculated with BmNPV dot hybridization and PCR amplification analysis demonstrated that BmNPV was not detected in the eggs laid by BmNPV productively infected female moths. The results indicated that BmNPV could not be transovarially transmitted.

• International Journal of Industrial Entomology and Biomaterials
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• 제32권1호
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• pp.1-11
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• 2016

Tropical tasar silkworm, Antheraea mylitta is a commercial forest silkworm in India that produces tasar silk, but never experimented in Uttarakhand, a Himalayan state of India. A. mylitta express divergent phenotypic characters under different ecological conditions; so, we studied the effect of seven forest tree species in two rearing seasons on variability in silk gland weight of Daba (bivoltine) ecorace of A. mylitta at Forest Research Institute in Dehra Dun, Uttarakhand during 2012 and 2013. We used two-way completely randomized block factorial design and Post HOC Tukey's HSD test to analyse the collected data and there after carried out multiple regression analysis. Results indicated that silk gland weight differed significantly between rearing seasons (DF=1, F=2333.98, p <0.05), host plants (DF 6, F= 1516.25, p <0.05) and their interactions (DF=6, F=7.10, p <0.05). Higher silk gland weight was found in second rearing season than the first on all the host tree species. Terminalia alata fed A. mylitta larvae showed the highest silk gland weight of 8.03 and 9.47 g in first and second rearing seasons, followed by T. tomentosa (7.19 & 9.01g), T. arjuna (6.8 & 8.08 g) and L. speciosa (6.57 & 7.83 g) fed larvae, respectively. Post HOC Tukey's HSD test indicated that silk gland weight of L. speciosa and T. arjuna fed larvae in both the rearing seasons did not differ significantly. E.I. analysis also confirmed that T. alata, T. tomentosa, T. arjuna and L. speciosa are better in their order of merit than T. bellirica , T. chebula and L. tomentosa. Multiple regression analysis indicates that larval weight gain is a strong predictor (β=1.002, t=346.777, p = <0.05) for the silk gland weight of A. mylitta ; however, larval duration had significant negative regression weight (β=-0.270, t=-8.436, p = <0.05) on mean weight of silk gland.

• 한국잠사곤충학회지
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• 제24권2호
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• pp.73-80
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• 1983

1. 인공사료육에 있어서 일본종계 현장려장품중들의 소화액 Amylase활성을 실용형질과 관련해서 조사한 결과는 다음과 같다. 가. 일본종계 현장려품종들에 있어서 소화액 Amylase활성은 품종간 차이가 있어, Hansaeng-1, Jam 115 및 Jam 117에서 강하였고 Hansang-3, Jam 113, Jam 119 및 Jam 201에서 중간이었으며, Jam 107, Jam 121 및 Gyeongchu에 있어서 약하였다. 나. 일본종계 현장려 잠품종들의 소화액 Amylase는 Daizo의 ＋(＋$^{aa}$ )형과 비교해서 아미도 -(ae)형으로 생각된다. 다. 일본중계 현장려잠품종들에 있어서 혈당량은 품종간 거의 차이가 없었으나, 성장, 견질등 실용형질에 있어서는 다소 차이가 있었다. 2. 인공사료의 a-Amylase 처리가 누에의 소화액 Amylase활성 및 실용형질에 미치는 영향을 조사한 결과는 다음과 같다. 가. a-Amylase를 처리한 사료를 먹은 누에는 처리하지 않은 누에에 비하여 성장이 다소 불량하고 소화액 Amylase활성도 약하며 성장에 대한 사료효율도 낮았다. 나. 그러나, a-Amylase를 처리한 사료를 먹은 누에는 처리하지 않은 누에에 비하여 혈당량도 많았고, 견질도 양호하였다. 따라서, 인공사료육에 있어서 사료의 a-Amylase처리는 견질에 대한 사료효율을 보다 향상시킬 수 있을 것으로 생각된다.