Quality Double Hybrid Seed by National Silkworm Seed Organization for Popularization of Bivoltine Sericulture in Chittoor District of Andhra Pradesh
Deepa P.*
Silkworm Seed Production Centre, National Silkworm Seed Organization, Central Silk Board, Madanapalle - 517325, Andhra Pradesh, INDIA
V. Harlapur
National Silkworm Seed Organization, Central Silk Board, Madiwala, Bangalore - 560068, Karnataka, INDIA
R.K. Mishra
National Silkworm Seed Organization, Central Silk Board, Madiwala, Bangalore - 560068, Karnataka, INDIA
DOI: NIL
Keywords: Average yield, Bivoltine double hybrid, National Silkworm Seed Organization
Abstract
Chittoor district which occupies first position in Mulberry sericulture in Andhra Pradesh is in the Rayalaseema region where the temperature goes up to 47oC in summer months. Inspite of water scarcity and low rainfall in the recent past, mulberry cocoon production sustained due to quality silkworm seed. NSSO has 20 SSPCs managed by well qualified scientists to create a new record in the seed production year after year. Bivoltine Double Hybrid Silkworm Seed have contributed for the sustenance and higher returns to the sericulturists. Grainage performance with the recovery of Dfls above NSSO norms as per the quality standards of ISO-9001:2015 has enhanced the returns from sericulture. The Bivoltine seed production by NSSO is appreciable as reflected in the Compounded Annual Growth rate (CAGR) of 17.21% for the past 5 years. The Bivoltine Dfls production by NSSO was 195.45 lakhs during 2013-14, 251.57 lakhs during 2014-15, 309.70 lakhs during 2015-16, 342.77 lakhs during 2016-17 and 314.32 lakhs during 2017-18 which clearly shows the continual improvement in production. The Egg recovery per 1 kg of Seed cocoon was well above the norms set for NSSO (65gms) in the grainages for the period from 2013-14 to 2017-18 which clearly defines the efficient utilization and management of Seed cocoons which has made the Bivoltine production economically sustainable. Present study was conducted in Chittoor cluster in Andhra Pradesh in 10 mandals i.e. Chittoor, Penumuru, Bangarupalem, Thavanampalle, Irala, Gudipala, Puthalapattu, G.D. Nellore, Pakala and Palasamudram. The paper deals with 5 years comparative data in Bivoltine Double Hybrid NSSO source Dfls brushing, Dfls harvesting, Average yield and Silk productivity since 2013-14 to 2017-18 in Chittoor cluster which shows continual improvement. The study reveals that the Dfls brushing was 82175 during 2013-14 which was increased to 110000 during 2014-15, 160400 during 2015-16, 249000 during 2016-17 and 443000 during 2017-18. Seed Cocoons harvested was 54.727 MT with an Average yield of 67.400 in 2013-14, 76.802 MT with an average yield of 69.820 in 2014-15, 102.988 MT with an average yield of 71.150 in 2015-16, 184.190 MT with an Average yield of 73.970 in 2016-17 and 313.400 MT with an Average yield of 75.900 in 2017-18. The study shows that quality Bivoltine Double hybrid NSSO source Dfls has enhanced the productivity and popularized the Bivoltine production in Chittoor district.
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