Non Mulberry
Non-Mulberry (Eri Culture)
Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Spinning performance of eri cocoons (worms fed on Tapioca and Rubber leaves)
Personnel :Sonwalkar TN, Sengupta D
Project Period :1977-1979
Objectives :To study the spinning performance of eri cocoons
Results/Recommendations :The degumming loss was lowest in the case of tapioca + rubber fed lot. But spinning performance appears to be better in the case of tapioca and also tapioca + rubber fed than that of rubber fed lot.
Source of Information :Annual Report: 1977-79
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Feasibility studies on introduction of ericulture in Kerala.
Personnel :Krishnaswami S, Vijayaraghavan K
Project Period :1977-1983
Objectives :To find out the feasibility of introducing ericulture in Kerala and to study in detail, various aspects of eri silkworm rearing under Kerala condition.
Results/Recommendations :The result indicated that the leaf removal during various growth phases of the plants inferred with the tuber production in varying degree. The reduction in tuber yield varied from 13.2 to 48.7% at the rate of 25% leaf removal. In the case of 50% leaf removal, the yield reduction ranged from 14.5-45.8%. However the present study indicates that 25% leaf removal at a periodic interval of 2 months may be attempted safely with comparatively less influence on the tuber yield.
Source of Information :Annual Report: 1978-83
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on the utility of leaves of papaya, sweet potato and Ceara rubber as food for eri silkworm.
Personnel :Krishnaswami S, Vijayaraghavan K, Rajan RK
Project Period :1978-1979
Objectives :To study the possibility of utilizing the abundant foliage available.
Results/Recommendations :The batches fed on Ceara rubber leaves are comparable to those fed on Cassava, whereas the leaves of papaya and sweet potato are not suitable for eri silkworm rearing. Larvae did not relish and feed on the leaves of sweet potato and did not undergo moulting. In the case of papaya, after a considerably prolonged larval period, leaf rejection, highly irregular moulting, irregular stunted growth and heavy mortality, a few larvae spun very small and flimsy cocoons. Those eri silkworms can be reared successfully on the abundantly available leaves of Ceara rubber (Manihot glaziovii).
Source of Information :Annual Report: 1978-79
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on the larval and cocoon characters for evaluating the suitability of the larvae of Ceara rubber and cassava and the interchange of the two as feed for eri silkworm.
Personnel :Krishnaswami S, Vijayaraghavan K, Rajan RK
Project Period :1978-1979
Objectives :To study the effect of feeding eri silkworm with either Cassava or Ceara rubber.
Results/Recommendations :Much difference did not exist between the treatments with regard to larval or cocoon characters. The larvae of Ceara rubber are as good as cassava leaves and is a safe substitute during shortage of cassava leaf.
Source of Information :Annual Report: 1978-79
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on the effect of feeding eri silkworms with cassava leaves of different maturity on growth and cocoon characters.
Personnel :Krishnaswami S, Vijayaraghavan K, Rajan RK
Project Period :1978-1980
Objectives :To utilize the bottom most mature leaves for eri silkworm rearing, thereby the impact of defoliation on the tuber formation and yield could be minimized.
Results/Recommendations :The marked difference regarding larval and cocoon characters either among the treatment or between treatments.
Source of Information :Annual Report: 1978-80
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on the comparative value of tapioca leaves as food of eri silkworm as against castor leaves-its primary food.
Personnel :Krishnaswami S, Vijayaraghavan K, Rajan RK
Project Period :1978-1980
Objectives :To find out the effect of feeding castor and tapioca on the growth and development of larvae and cocoon characters so as to assess their food value.
Results/Recommendations :Castor leaves stand superior to Cassava with respect to the economic characters studied viz., single cocoon weight, single shell weight and shell percentage. Faster leaf consumption and utilization observed in case of castor leaf feeding might be the cause of the reduction in larval duration.
Source of Information :Annual Report: 1978-80
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on the estimation of leaf laying and leaf cocoon ratio and the general rearing performance.
Personnel :Krishnaswami S, Vijayaraghavan K, Rajan RK
Project Period :1978-1981
Objectives :To study the general rearing performance and to assess the profitability and economics of rearing under Trivandrum conditions.
Results/Recommendations :The mean data indicates, number of eggs/laying 250, 84.5% hatching, larval duration 19-00 days, larval weight 6.64 gm, yield 89.9%, yield/100 dfls 44.3 kg, single cocoon weight 2.41 gm, single shell weight 353 cgm, shell ratio 14.6%, leaf laying ratio 8:1 and leaf cocoon ratio 18:1.
Source of Information :Annual Report: 1978-81
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on the effect of different duration of mating of the eri moths on egg laying capacity and hatching performance.
Personnel :Krishnaswami S, Vijayaraghavan K, Rajan RK
Project Period :1978-1980
Objectives :To study the minimum duration of mating required for obtaining maximum level of fecundity and higher hatching performance.
Results/Recommendations :It can be concluded that a mating duration of three hours does not differ much with mating duration of twelve hours regarding both the fecundity level and hatching performance and hence three hours duration of mating can be considered as adequate.
Source of Information :Annual Report: 1978-80
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on the hatchability and rearing performance of the eri silkworm eggs laid on different days of oviposition.
Project period :1978-1980
Objectives :To study the hatching, growth, development and cocoon characters of the eri silkworm eggs laid on different days of oviposition, which continues for 2-3 days.
Results/Recommendations :The number of eggs laid on first day was 264 with a total hatching percentage of 89.2. On the second day of oviposition only 53 eggs were laid with a hatching percentage of 74.3.
Source of Information :Annual Report: 1978-80
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on the different methods for laying preparation and their effect on the egg laying performance in eri moths.
Personnel : Krishnaswami S, Vijayaraghavan K, Rajan RK
Project Period :1978-1980
Objectives :To study the adaptability of employing various methods for egg preparation on the egg laying performance in eri moths and to confirm that a vertical position as provided by the conventional 'Kharikas' is invariably required by the moths for normal oviposition.
Results/Recommendations :It is concluded that moths individually covered with plastic cones can be allowed to lay eggs on a polythene paper without anyway affecting the egg laying capacity, and a vertical position as provided by 'Kharikas' is not essential for efficient oviposition. Besides, handling of moths during grainage operation is made easier by adopting the former method.
Source of Information :Annual Report: 1978-80
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Studies on the effect of defoliation on the formation and yield of tuber in cassava
Personnel :Vijayaraghavan K
Project Period :1978-1984
Objectives :To assess the quantity of leaves defoliated at various growth phases of the plant and to study the effect of defoliation on the yield of tuber in cassava.
Results/Recommendations :The results indicate that the leaf removal during various growth phases of the plants interfered with the tuber reduction in varying degrees. The control plot, where there was no leaf removal has given maximum tuber yield. The reduction in tuber yield observed varied from 13.2% in T1 (4 pluckings) to 48.7% in T4 (plucking) at the rate of 25% leaf removal. In the case of 50% leaf removal, the yield reduction ranged from 14.5- 45.8%. However, the present study indicates that 25% leaf removal at a periodic interval of 2 months commencing from 3rd month of planting to 9th month may be attempted safely with comparatively less influence on the tuber yield.
Source of Information :Annual Report: 1978-84
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Growth observation on tapioca plant to assess the leaf retention and to estimate the leaf availability.
Project Period :1978-1980
Objectives :To determine the period of maximum leaf retention, so that a portion of leaf could be removed for rearing without much affecting the yield of main crop.
Results/Recommendations :The optimum leaf area required to support normal tuber development is maintained only from 3rd to 6th month period of growth. Defoliation should be allowed only during the above period, provided enough foliage over and above the optimum level is available.
Source of Information :Annual Report: 1978-80
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Field trial of eri silkworm rearing.
Project Period :1978-1979
Results/Recommendations :A party in Kazhakuttom, reared eri silkworms in three batches of 65, 35 and 27 dfls. He harvested a total of 30,400 cocoons yielding 7.5 kg of shell and the yield of cocoons works out to be 77%. Average larval duration was 20:16D-H. Average single cocoon weight, average shell weight and shell percentage were 1.896 gm, 0.273 gm and 14.4% respectively.
Source of Information :Annual Report: 1978-79
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Spinning studies-Comparative spinning studies on white and brick red eri cocoons.
Personnel :Sonwalkar TN
Project Period :1979-1980
Objectives :To study the difference between white and brick red mixed eri cocoons.
Results/Recommendations :Degumming loss was same in both the colours. However, yield and production rate were slightly better in white eri cocoons as compared to brick red eri cocoons.
Source of Information :Annual Report:1979 -80
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Isolation and purification of eri silkworm for selective breeding based on larval and cocoons characters.
Project Period :1979-1980
Objectives :To exploit the hybrid vigour of eri silkworm strains
Results/Recommendations :The four types of larvae namely: Plain green, Marked green, Plain cream, Marked cream have been isolated from a heterogenous collection and subsequent inbreeding.
Source of Information :Annual Report:1979 -80
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Feasibility studies on the introduction of ericulture in Kerala-Studies on the eri culture in an intercropping cassava farm.
Personnel : Vijayaraghavan K
Project period:1980-1981
Results/Recommendations :The defoliation for ericulture commenced after the harvest of the intercrop at 3rd month. To simulate the actual practice of plucking according to the requirement, leaf harvest extended for a period of 20 days and simultaneous rearings were also conducted. The average yield of the intercrop was 14.14 quintals/ha.
Source of Information :Annual Report:1980-81
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Trial rearing of eri silkworms (RSRS, Salem).
Personnel :Vijayaraghavan K, Sampath C, Das PK
Project period:1982-1983
Results/Recommendations :The average yield of five trial rearings were found to be 42.1 kg/100 dfls.
Source of Information :Annual Report:1982-83
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Feasibility studies on the introduction of ericulture on irrigated Tapioca. (RSRS, Salem)
Personnel :Vijayaraghavan K, Srinivasa Murthy K, Das PK
Project Period :1982-1984
Objectives : To study the feasibility on the introduction of ericulture on irrigated Tapioca.
Results/Recommendations :Leaf removal during various growth phases of the plants interfered with the tuber production in varying degrees. 25% leaf removal at a periodic interval of 2 months commencing from 3rd month of planting to 9th month may be attended safely with less influence on the tuber yield.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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Project No.:CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Non-mulberry sericulture-Development of non-mulberry sericulture at CSRTI, Mysore.
Personnel :Chatterjee SN, Shivakumar GS, Bhargava SK
Project Period :1986-1988
Objectives :For demonstration purpose, to give R&D support to CSR&TI, Tasar Extension Centres and also to study the genetics of different sericigenous insects.
Results/Recommendations :Rogor was sprayed with frequent intervals to control the pests on tasar plants. Pests were not observed on muga plantation. Some more muga and tomentosa seedlings would be procured for plantation during the next season.
Source of Information :Annual Report:1986-88
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Project No :CSM
Organization :Central Sericultural Research and Training Institute, Mysore.
Project Title :Non-mulberry sericulture-Development of non-mulberry sericulture.
Personnel :Chatterjee SN, Shivakumar GR, Rao CGP, Damodara Naidu W, Chatterjee GK
Project Period :1986-1988
Objectives :To develop non mulberry sericulture.
Results/Recommendations :One thousand seedlings of Terminalia arjuna, 750 T. tomentosa, 500 of Hardwickia binata were transplanted. Further som, soalu and castor seeds were also cultivated.
Source of Information :Directory of Concluded Projects of CSRTI, Mysore- 2005
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