{"id":12,"date":"2013-05-01T12:58:56","date_gmt":"2013-05-01T12:58:56","guid":{"rendered":"https:\/\/silks.csb.gov.in\/aizawl\/?page_id=12"},"modified":"2020-09-25T08:25:55","modified_gmt":"2020-09-25T08:25:55","slug":"rearing-of-mulberry-silkworm","status":"publish","type":"page","link":"https:\/\/silks.csb.gov.in\/ramanagara\/rearing-of-mulberry-silkworm\/","title":{"rendered":"Rearing of Mulberry Silkworm"},"content":{"rendered":"<div style=\"width:760px;height:650px;overflow:auto;margin:0px;padding: 0px 15px 0px 15px\">\n<h1 align=\"center\">Rearing of Mulberry Silkworm<\/h1>\n<h5>Rearing house (for 200-250dfls.)<\/h5>\n<ul>\n<li>Construct rearing house of 50 feet x 20 feet x10 feet size on an elevated and shady place to accommodate 200-250 dfls.<\/li>\n<li>Provide 3 feet verandah surrounding the rearing house.<\/li>\n<li>Provide sufficient windows and ventilators for free circulation of air inside the rearing house.<\/li>\n<li>Cover the windows and ventilators with nylon net to restrict the entry of uzi flies.<\/li>\n<\/ul>\n<div><img decoding=\"async\" alt=\"silks\" src=\"https:\/\/silks.csb.gov.in\/ballia\/wp-content\/uploads\/sites\/5\/2014\/03\/clip_image002.jpg\" align=\"right\" \/><\/div>\n<h5>Hybrids recommended<\/h5>\n<ul>\n<li><strong>Multivoltine:<\/strong> PM \u00d7 CSR2, L14 \u00d7 CSR2<\/li>\n<li><strong>Bivoltine:<\/strong> CSR2 \u00d7 CSR4, FC1 \u00d7 FC2 (Double hybrid)<\/li>\n<\/ul>\n<p>Disinfect the rearing house and appliances with recommended disinfectants<\/p>\n<h5>Rearing appliances<\/h5>\n<p>Power sprayer, rearing stands, rearing trays, foam pads, wax coated paraffin papers, nylon nets, basket for keeping leaves, gunny bags, rotary or bamboo mountages\/or netrikes.<\/p>\n<h5>Incubation and brushing<\/h5>\n<ul>\n<li>Spread the eggs in one layer on a paraffin paper kept on a tray.<\/li>\n<li>Cover the eggs with another paraffin paper.<\/li>\n<li>Maintain the room temperature at 25-26\u00b0C and relative humidity at 80%.<\/li>\n<li>When blue pinhead appears, wrap the eggs (25-50 dfls each) in a tissue paper and keep the eggs inside a black painted box or cover with black cloths or papers for 1-2 days.<\/li>\n<li>On the next day, expose the eggs under diffused sunlight or under shade.<\/li>\n<\/ul>\n<div><img decoding=\"async\" alt=\"silks\" src=\"https:\/\/silks.csb.gov.in\/ballia\/wp-content\/uploads\/sites\/5\/2014\/03\/gf.jpg\" align=\"right\" \/><\/div>\n<h5>Brushing of newly hatched worms<\/h5>\n<ul>\n<li>Transfer the newly hatched worm carefully with a soft brush or feather to a paraffin coated paper kept on a rearing tray.<\/li>\n<li>Feed the worms with tender leaves (3rd and 4th leaf from the apex of the branch) chopped into 0.5-1 cm size.<\/li>\n<\/ul>\n<h5>Chawki rearing<\/h5>\n<ul>\n<li>Distribute the worms uniformly in the trays.<\/li>\n<li>Feed the silkworm with nutritious and succulent leaf.<\/li>\n<div><img decoding=\"async\" alt=\"silks\" src=\"https:\/\/silks.csb.gov.in\/ballia\/wp-content\/uploads\/sites\/5\/2014\/03\/d.png\" align=\"right\" \/><\/div>\n<li>Provide 3-4 times feeding with tender leaves of 0.5-2 cm cut pieces during 1st stage.<\/li>\n<li>Provide leaves @ 5 kg\/100 dfls for 1st and 18 kg\/100 dfls for 2nd instar worms.<\/li>\n<li>During 2nd stage, cut the leaf into 2-4 sq. cm and feed 3-4 times.<\/li>\n<li>Maintain temperature at 27-28\u00b0C and relative humidity at 80-90%.<\/li>\n<li>Every day before 2nd feeding, spread the bed to facilitate drying of leaf applied in the previous feeding.<\/li>\n<li>Ensure bed cleaning once during 1st and 2nd moult and daily during 3rd stage with cotton cleaning net of 0.5 sq. cm mesh size.<\/li>\n<li>Reduce bed thickness prior to moulting.<\/li>\n<li>When 97% worms settle for moulting, stop feeding &amp; apply slaked lime on the body of the worms.<\/li>\n<\/ul>\n<div><img decoding=\"async\" alt=\"silks\" src=\"https:\/\/silks.csb.gov.in\/ballia\/wp-content\/uploads\/sites\/5\/2014\/03\/zss.jpg\" align=\"right\" \/><\/div>\n<h5>Late age Rearing<\/h5>\n<ul>\n<li>Silkworms after second moult are shifted to shoot racks<\/li>\n<li>Shoot rearing racks are made of iron, wood or bamboo<\/li>\n<li>It is ideal to have 3 tiers<\/li>\n<li>Width of the rack should not exceed 5 ft.<\/li>\n<li>Bottom tier should be 1 ft above the ground level<\/li>\n<li>Space between two tiers should be minimum 2 ft<\/li>\n<li>Shoot for feed the larvae should be 50-60 days old.<\/li>\n<li>2 or 3 feedings\/ day is recommended.<\/li>\n<li>Bed cleaning is done only once on 4th day of  5th instar.<\/li>\n<li>Provide cross ventilation.<\/li>\n<li>Provide correct bed spacing (800-900 Sqft\/100 dfls) and feed adequately (2500 kg shoot \/100 dfls).<\/li>\n<\/ul>\n<h5>Care during moulting<\/h5>\n<ul>\n<li>Stop feeding when 90% worms enter into moult.<\/li>\n<li>Spread the bed for proper drying and aeration.<\/li>\n<\/ul>\n<p>Dust lime powder on the bed to keep the humidity low.<\/p>\n<h5>Mounting and Harvesting<\/h5>\n<ul>\n<li>Pick fully ripened worms for mounting.<\/li>\n<li>Mount in suitable mountages like rotary, plastic collapsible or bamboo mountages<\/li>\n<li>Mount 40-45 worms per sq. ft. area.<\/li>\n<li>Remove diseased and dead worms.<\/li>\n<li>Maintain temperature of 27-28\u00b0C and RH of 60-70%.<\/li>\n<li>Provide aeration to remove excess moisture.<\/li>\n<li>Avoid strong light.<\/li>\n<li>Harvest the cocoons on 5th day of mounting.<\/li>\n<li>Remove flimsy, stained and irregular sized cocoons.<\/li>\n<\/ul>\n<h5>Rearing and personal hygiene<\/h5>\n<ul>\n<li>Wash hand with a disinfectant prior to the entry of rearing house.<\/li>\n<li>Avoid entry of person other than those involved in rearing.<\/li>\n<li>Sprinkle 5% high grade bleaching powder around rearing house at 5-6 days interval.<\/li>\n<li>Collect diseased worms and dispose properly (burn or bury them).<\/li>\n<li>Clean the rearing floor with 2% bleaching powder solution before and after bed cleaning.<\/li>\n<li>Use bed disinfectant, on the larvae when the larvae come out of moult.<\/li>\n<\/ul>\n<h5>Source:<\/h5>\n<p>Central Sericultural Research &amp; Training Institute, Mysore, Karnataka<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rearing of Mulberry Silkworm Rearing house (for 200-250dfls.) Construct rearing house of 50 feet x 20 feet x10 feet size on an elevated and shady place to accommodate 200-250 dfls. Provide 3 feet verandah surrounding the rearing house. Provide sufficient windows and ventilators for free circulation of air inside the rearing house. Cover the windows [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_links_to":"","_links_to_target":""},"_links":{"self":[{"href":"https:\/\/silks.csb.gov.in\/ramanagara\/wp-json\/wp\/v2\/pages\/12"}],"collection":[{"href":"https:\/\/silks.csb.gov.in\/ramanagara\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/silks.csb.gov.in\/ramanagara\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/silks.csb.gov.in\/ramanagara\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/silks.csb.gov.in\/ramanagara\/wp-json\/wp\/v2\/comments?post=12"}],"version-history":[{"count":2,"href":"https:\/\/silks.csb.gov.in\/ramanagara\/wp-json\/wp\/v2\/pages\/12\/revisions"}],"predecessor-version":[{"id":626,"href":"https:\/\/silks.csb.gov.in\/ramanagara\/wp-json\/wp\/v2\/pages\/12\/revisions\/626"}],"wp:attachment":[{"href":"https:\/\/silks.csb.gov.in\/ramanagara\/wp-json\/wp\/v2\/media?parent=12"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}