National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Tasar silkworm (Antheraea mylitta Drury) rearing and cocoon production are mainlycarried out by Tribal people of Central India and some parts of Odisha and Telangana states. Lack of Tasar silkworm seed production and preservationtechnology is creating difficulties in timely supply of adequate quantity of seed to the farmers and others stake holders..High temperature above 28ºC and less relative humidity than 50% are not suitable for the oviposition and hatching of eggs. In Tasar silk moth, egg retention was also more even after 72 h of oviposition in natural conditions.In the present investigation, while providing optimum temperature (27-28ºC) and humidity (75-80%) in the egg laying room, egg laying was carried out in bivoltine and trivoltine broods under different stress conditions. The results indicated that in bivoltines (per5 moths), in T1 where antenna and wings were amputated, the number of eggs recorded were 1306, in T2 (legs and wings cut) it were 902 and in T3 (antenna, wings & legs cut), the number of laid eggs were 1154 when compared to 907 in Normal conditions (T0) for 5 months. Egg retention results indicated that in T1,itwas 200 amounting to 13.28% and fecundity was 261. In T2,it was 145 amounting to 13.85 % and fecundity was 180. In T3, with Antenna, legs & wings amputation egg retention was 135 amounting to 10.47 % and fecundity of 231.In case of normal moths (T0), egg retention was 124 amounting to 12.03 % with a fecundity of 181. In case of Trivoltines (5 moths) also same pattern was observed. The mentioned stress conditions are useful while grainage operations for getting more fecundity.
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