Schemes are proposed under supply of rearing appliances for 2018-19. About 35 sets of rotary mountages are required for mounting worms of 100 dfls. Silkworm rearing requires certain specialized rearing equipment like shoot rearing stands, plastic trays, netrikae, leaf clopping knives, secateurs, humidifiers etc. The microscopic observation of a drop of haemolymph from diseased larvae reveals the presence of large number of hexagonal/pentagonal or tetragonal structures – the OBs/polyhedra. Distribute the larvae uniformly in the bed during every feeding. Introduction. Fixation of rate for chawki worms; Harvesting and transport of cocoons. Central Sericulture Research & Training Institute, Mysore, Ministry of Electronics and Information Technology (MeitY). White muscardine caused by Beauveria bassiana is an important factor affecting sericulture. In winter, delay the harvest by one day. Bombyx mori, the domestic silk moth, is an insect from the moth family Bombycidae.It is the closest relative of Bombyx mandarina, the wild silk moth.The silkworm is the larva or caterpillar of a silk moth. Subsequent pruning is done twice a year. Employ the measures for destruction of diseased silkworm eggs/cocoons/feces. Such larvae are picked immediately and mounted on to the mountages. Source of infection: Silkworm gets infected when it feed on contaminated mulberry leaves. Identification of silkworm pests and their life stages. Spread the bed gently soon after the worms settle for moult and apply slaked lime powder uniformly over the bed to ensure drying of bed. Note: Vijetha supplement is recommended for the use during rainy season and winter months to control muscardine. Daily 3 feeds (6 AM, 2 PM and 10 PM) schedule should be followed. The size of the rearing house depends upon the quantum and type of rearing. Reduction in contamination and spread of diseases due to less handling of silkworms. Occurrence: The disease prevails all through the year but its severity is more during Summer and Rainy seasons. Pruning is recommended after the mulberry is one year old; and plants can, thereafter, support up to 4 boxes of silkworms. The milky white fluid released by the grasserie larvae, contaminated silkworm rearing house and appliances are the sources of infection. Muga Silk The golden yellow silk is secreted by multivoltine silkworm A.assamensis, distributed in Assam. Keep the rearing room clean and well aerated during silkworm rearing. 3000 and supports a six-member fami The harvested shoots should be preserved loosely in vertical position in cool and moist place by covering with cleaned, disinfected and wet gunny cloth. Avoid feeding of soiled or over matured leaves. The milky white fluid released by the grasserie larvae, contaminated silkworm rearing house and appliances … From hatching to its full-grown stage, the silk worms pass through five instars and the worms up to stage two are called young age worms or chawki. Silkworm Bombyx mori (L), the source for production of fabulous silk and sericulture industry, has been domesticated more than 4000 years ago. Silkworm rearing requires certain specialized rearing equipment like shoot rearing stands, plastic trays, netrikae, leaf clopping knives, secateurs, humidifiers etc. Don’t spill the bed refuse on the floor of the rearing room while cleaning the bed. 80% humidity is required for III instar larvae and 70% is required for IV and V instar larvae. About 700-900 Kg cocoon can be harvested from one acre of mulberry garden in a year. He is now fully involved in agriculture dividing his time between sericulture as well as in the dairy sector. The late age silkworms do not tolerate high temperature, high humidity and poor ventilation. Rearing house and appliances . Centre for Development of Advanced Computing, Hyderabad. (iv) For disinfection of rearing accessories, other agents like Benomyl. Ensure meticulous disinfection of silkworm rearing house, appliances and the surroundings of the rearing house and use quality disinfectants at recommended concentration, quantity and schedule. Supply of Rearing appliances. Silkworms after second moult are shifted to shoot racks. The following In the present study, a total of 124 B. bassiana isolates were obtained from the silkworm cadavers, rearing rooms and appliances, surrounding mulberry orchards, pine plantations, and croplands in Jingxian County of south Anhui and Qishan County of southwest Anhui. Cleaning of rearing houses and appliance Immediately after the completion of the silkworm rearing and disposal of the cocoons, all the refuse of the rearing including dead larvae and pupae should be gathered in one place inside the rearing house. Accordingly scheme is being implemented with 90% Assistance. Diseases are the major constraint in silk cocoon production inIndia. The size of the rearing house depends upon the quantum and type of rearing. Sericulture needs Low Investment and High Returns: Mulberry takes only six months to grow for the commencement of silkworm rearing.For this unit, you need a minimum investment of only Rs.13,000 to 16,000 … By the Han Dynasty (206 BCE–9 CE), silk production was so important to international trade that the camel caravan trails used to connect Chang'An with Europe were named the Silk Road. Home / Techniques of Rearing Silkworm . Differences between rearing of crossbreed and bivoltine silkworm: CO3: Rearing houses, plan and maintenance. Construct rearing house of 50 feet x 20 feet x10 feet size on an elevated and shady place to accommodate 200-250 dfls. ... Rearing appliances. Ensure rearing and personal hygiene during the rearing. Rotary mountages are recommended for the production of better quality cocoons. Incubate silkworm eggs under optimum environmental conditions. Disinfect silkworm rearing house, its surrounding and appliances before brushing; Conduct additional disinfection with 0.3% lime solution. Silkworm gets infected through eggs (Transovarian/Transovum transmission) or by eating contaminated mulberry leaf. The schedule suggested for disinfection is given in Table 2. 60-65 days old shoots should be fed to fifth age worms. It is therefore necessary to evolve measures for economic cooling through selection of proper material for wall and roof fabrication, orientation of building, construction method, design, etc. Week 1 Modules : 1.Disinfection of rearing house and different methods of disinfection/ 2.Silkworm Rearing appliances/ 3.Different types of silkworm rearing. Rearing Appliances in Silkworm Rearing The late age silkworm rearing house must have good cross-ventilation to bring down the house temperature and for removal of vapors and unfavorable or harmful gases generated from large quantities of silkworms excreta. This portal has been developed as part of the national level initiative - India Development Gateway (InDG), dedicated for providing information / knowledge and ICT based knowledge products and services in the domain of social development. If muscardine disease is high during rainy and winter seasons, the use of Vijetha supplement is recommended to prevent this disease. The popular items made from this silk are ‘dhoti’, ‘chaddar’, ‘chapkan’,’pugree’ and ‘mekhala’. To obtain such quality cocoons, mounting the silkworm larvae at the appropriate time and good quality mountages are essential. Cocoons need to be loosely packed in nylon netted bags of 30~40 kg capacity and transported in vehicle having shelves/partitions so that pressing of cocoons can be avoided. Symptoms: The skin of infected … Table 3: Schedule and quantity to be dusted (for 100 dfls). Silkworm rearing requires certain specialized rearing equipment like shoot rearing stands, plastic trays, netrikae, leaf clopping knives, secateurs, humidifiers etc. Wash hands and feet with disinfectant solution before entering in to the rearing house. Secondary contamination is reduced, as worms and leaves are separated from faeces. Diseased/dead silkworms, faecal matter, contaminated mulberry leaves and rearing appliances act as sources of infection. Predisposing factors: High temperature, low humidity and poor quality mulberry leaves. Contaminated rearing room and rearing appliances are the main source of muscardine infection during silkworm rearing. Resume feeding when 95% of worms come out of moult. For hanging rotary mountages, a separate mounting hall or verandah is required. Shoot rearing racks are made of iron, wood or bamboo. Dust dry slaked lime powder when silkworms settle for moult. Take the powder in a thin cloth and dust over the silkworms @ 5 g/square feet after every moult and once on 4th day of final instar after bed cleaning as given in Table 3. Rear young silkworms as well as late age silkworms under strict hygienic condition; Avoid high temperatures (28-35degC), low rearing temperatures (10-20degC) and rearing humidity (less than 70%) The S.C and tribal farmers need financial assistance for purchase of the said rearing equipment. The ideal temperature for the late age rearing is 26 C for III instar larvae, 25 C for IV instar and 24 C for V instar larvae. Rearing Appliances : The farmer who establish silkworm rearing racks in the rearing shed are given appliances to the worth of Rs.52,500/- as Subsidy. Rearing appliances: CO4: Agencies involved in egg production and procurement of eggs: CO5: Rearing of chawki worms and methods: CO6: Record maintenance and logistics at Chawki Rearing Centres: CO7: Transport of Chawki worms: CO8 Good cross ventilation will help to reduce the body temperature of the silkworm. Hence, the rearing house should have cross ventilation facilities to bring down the room temperature and for removal of vapour and harmful gases generated from large quantities of excreta produced by silkworms. InDG is a Ministry of Electronics and Information Technology (MeitY) Government of India initiative and is executed by Centre for Development of Advanced Computing, Hyderabad. When the larvae are in spinning stage, the room temperature of 24°C and 60-70 % of relative humidity along with good aeration facility are to be provided. Dusting disinfectant in front of rearing house and to the passage, Open the windows of rearing house for ventilation, After III moult before resumption of feeding, After IV moult before resumption of feeding. Silkworm rearing house and appliances: Rearing house - Early age rearing and Late age rearing. Disinfection: It is the most important opera­tion that to be carried out prior to the commencement of … Ensure good ventilation and dry condition in the rearing house during moulting period. Silk products and silkworm-rearing technologies came to play a critical role in Chinese trade networks and in the interaction of cultures among different countries. 10 NON MULBERRY SILKWORM AND MULBERRY REARING REQUIREMENTS 1.3.2. Collection and burning of diseased larvae and melted and flimsy cocoons. In this method of silkworm rearing, the last 3 stages of rearing will be conducted by giving mulberry shoots instead of individual leaves. Wash hands in disinfectant solution and water after picking of diseased worms, after bed cleaning and before feeding. Commercial reaing is practiced in Sibsagar, Remove the unhealthy larvae, if any and put them into 2% bleaching powder in 0.3% slaked lime solution. Pick the diseased worms every day into a basin with lime powder and bleaching powder mixture and dispose off carefully by burning or burying at a distant place. S. M. Mangali is a 77-year old retired schoolteacher, hailing from Shirahatta taluk in Gadag district of Karnataka. Conduct disinfection of rearing house, its surroundings and rearing appliances . • Practice disinfection of silkworm rearing house, surroundings, appliances, silkworm seed production unit and silkworm egg surface. Second disinfection of rearing house and appliances. These worms are voracious feeders. Disinfection of rearing house and appliances should be made twice before rearing that is once with 5% bleaching powder (immediately after the completion of previous crop) and another time with 2.5% Sanitech (Chlorine di-oxide) solution just 2 days before the next crop. These OBs contaminates the silkworm-rearing environment, the rearing house; appliances etc. Remove defective cocoons. The picked larvae should be put into 2% bleaching powder in 0.3% slaked lime solution. GRASSERIE: Causative agent: Bombyx mori Nuclear Polyhedrosis Virus. The desire race of silkworm DFLs (Diseased Free Layings) are pro- cured from grainage. Don’t dust when silkworm are under moult or on eatable mulberry leaves. Flacherie is a syndrome associated with bacterial diseases. A rearing house, either of mud or wood should be at least 25 x 20 x 10 feet with adequate ventilation rearing the silk larvae. The method of usage is as follows. Infected silkworms, faecal matter, contaminated rearing house and appliances and alternate hosts (mulberry pest) are the sources of infection. Space between two tiers should be minimum 2 ft. Better preservation of leaf quality both during storing and on the bed. Appliances : Rearing trays, ant-wells, rearing stands and racks, paraffin papers, rubber foam pads, net, chopsticks, feathers. It should also be convenient enough to conduct effective cleaning and disinfection. Rearing houses and appliances. Adjust the temperature and relative humidity as per requirement by using cooling, heating and humidifying appliances such as air cooler, room heater, charcoal stove, wet gunny cloth or by sprinkling water on the roof or using wet sand. It is ideal to have 3 tiers. Control alternate hosts of the pathogen. Initiate feeding with 50-55 days old shoots harvested at the height of 3-4 feet in the cooler hours of the day preferably in the morning. rearing area, feeding sufficient quantity and quality mulberry under suitable environmental and hygienic. Mangali has a monthly income of Rs. A man with great vision, he has strived hard to do his bit to improve the lot of fellow farmers. The S.C and tribal farmers need financial assistance for purchase of the said rearing equipment. and serve as a source of infection for healthy silkworms. Avoid high fluctuation of temperature and humidity as well as strong wind and bright light. © 2006–2019 C–DAC.All content appearing on the vikaspedia portal is through collaborative effort of vikaspedia and its partners.We encourage you to use and share the content in a respectful and fair manner. Disinfection, care in handling and incubation of eggs; dark treatment, brushing; leaf selection for .different instars, frequency and quantum of feeding. Feed silkworms with adequate quantity of mulberry leaves to avoid the accumulation. All rearing appliances including the rearing room then should be disinfected with 4-5% formalin solution or by spreading bleaching powder, (iii) Adult moths showing symptoms of pebrine should not be undertaken for any sericultural processes. The bed space required for the worms of 100 dfls at the end of the fifth stage is 600 sq ft. Width of the rack should not exceed 5 ft. Bottom tier should be 1 ft above the ground level. This method is the most economical method of rearing, as it helps to save about 40% of rearing labour. Sericulture is the BestAgro-based Enterprise in Rural Areas: More than 57 % of the gross value of the final product in the industry (silk fabrics) flows back to the cocoon growers. Schedule of disinfection for rearing house and appliances.