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( K. M. Vijaya Kumari ),( M. Balavenkatasubbaia ),( R. K. Rajan ),( M. T. Himantharaj ),( B. Nataraj ),( M. Rekha ) 한국잠사학회 2001 International Journal of Industrial Entomology Vol.3 No.2
Fifth instar larvae of the new bivoltine hybrid (CSR2×CSR5) were reared under different temperature and humidity viz., 20℃ and 85±5% R.H (T1), 25℃ and 70±5% R.H (T2-Optimum), 30℃ and 80%±5 R.H (T3) and 35℃ and 50±5% R.H (T4). The cocoon yield, cocoon characters and disease incidence were studied in normal (non infectious source, i.e control) rearing as well as in 1% infectious source of rearing. The results indicated that V instar larval duration was prolonged and cocoon weight was improved in T1. ERR and shell ratio were significantly improved and disease incidence was minimised in T2. Further significant difference was observed among the treatments with regard to spread of diseases.
Kumari, K.M.Vijaya,Rajan, R.K.,Himantharaj, M.T.,Nataraj, B.,Rekha, M. Korean Society of Sericultural Science 2001 International Journal of Industrial Entomology Vol.3 No.2
Fifth instar larvae of the new bivoltine hybrid (CSR2 ${\times}$ CSR5) were reared under different temperature and humidity viz., $20^{\circ}C$ and 85 ${pm}$ 5% R.H (T1), $25^{\circ}C$ and 70 ${pm}$ 5% R.H (T2-Optimum), $30^{\circ}C$ and 80% ${pm}$ 5 R.H (T3) and $35^{\circ}C$and 50 ${pm}$ 5% R.H (T4). The cocoon yield, cocoon characters and disease incidence were studied in normal (non infectious source, i.e control) rearing as well as in 1% infectious source of rearing. The results indicated that V instar larval duration was prolonged and cocoon weight was improved in T1. ERR and shell ratio were significantly improved and disease incidence was minimised in T2. Further significant difference was observed among the treatments with regard to spread of diseases.
Himantharaj, M.T.,Das, Kakali,Kumari, K.M.Vijaya,Rajan, R.K. Korean Society of Sericultural Science 2002 International Journal of Industrial Entomology Vol.4 No.1
Rotary mountages are the best mountages among all the mountages that are used in sericultural areas. But to use this mountage more space, separate mounting hall & requires more labour to pickup the matured worms. to over come these problems, self mounting method is adopted to save the time Er labour, But the mounting rate is generally less. To accelerate the mounting rate different repellents viz; saw dust, phytoecdysone, 1% cresol with paddy husk, lime, kaolin, gormalin chaff were used in the present study. The results indicated that highest number of larvae climbed the mountage in 1% cresol with paddy husk, followed by phytoecdysone and lime. It is observed that the use of repellents at wandering stage accilerates mounting rate and did not affect the quality of the cocoons and reeling characters.
Food Ingestion, Assimilation and Conversion Efficiency of Mulberry Silkworm, Bombyx mori L.
Rahmathulla V. K.,Haque Rufaiel S. Z.,Himantharaj M. T.,Vindya G S.,Rajan R. K. Korean Society of Sericultural Science 2005 International Journal of Industrial Entomology Vol.11 No.1
Feed conversion efficiency contributes directly or indirectly on the cost benefit ratio of silkworm rearing and is considered to be an important physiological criterion for evaluating the superiority of silkworm breeds/hybrids. Food intake, assimilation and conversion of indigenous as well as exotic silkworm races are well studied by many researchers. In this review, an attempt has been made to consolidate works on feed conversion aspects of indigenous and exotic silkworm races. The paper also deals with the effect of various factors viz., nutritional, environmental and feeding on food assimilation and conversion parameters of mulberry silkworm.
( V. K. Rahmatholla ),( S. Z. Haque Rufaie ),( M. T. Himantharaj ),( G. S. Vindya ),( R. K. Rajan ) 한국잠사학회 2005 International Journal of Industrial Entomology Vol.11 No.1
Feed conversion efficiency contributes directly or indirectly on the cost benefit ratio of silkworm rearing and is considered to be an important physiological criterion for evaluating the superiority of silkworm breeds/hybrids. Food intake, assimilation and conversion of indigenous as well as exotic silkworm races are well studied by many researchers. In this review, an attempt has been made to consolidate works on feed conversion aspects of indigenous and exotic silkworm races. The paper also deals with the effect of various factors viz., nutritional, environmental and feeding on food assimilation and conversion parameters of mulberry silkworm.
Rahmathulla, V.K.,Nayak, Padmanav,Vindya, G.S.,Himantharaj, M.T.,Rajan, R.K. Korean Society of Sericultural Science 2003 International Journal of Industrial Entomology Vol.7 No.2
The impact of antibiotic (Norfloxacin) administration ,at different concentration (50 ppm and 100 ppm) on commercial characters of bivoltine $({CSR_2}{\times}{CR_4})$ and the cross breed race $({BL_67}{\times}{CSR_101})$ was studied. The result indicated that antibiotic administration with different concentrations significantly improved the rearing and cocoon parameters like larval duration, larval weight, growth index, single cocoon weight, single shell weight and shell ratio. The post cocoon parameters like average filament length, non-breakable filament length, raw silk percentage, raw silk recovery percentage, denier, reelability and neatness were recorded significantly higher in antibiotic treated batches. The better performances of these parameters were recorded with the increase of antibiotic concentration.