author(s)
Hasansab Nadaf, MS Rathore, Chandrashekhriah M, Vishaka GV and RB Sinha

abstract
Antheraea mylitta D. is a semi-domesticated silkworm being reared outdoor.After the commercial crop rearing, it undergoes pupal diapause to avoid unfavourable environmental conditions. For seed (egg) production, the diapausing seed cocoons are preserved in the grainage houses till the completion of diapausing period. The tasar seed production mainly depends on the quality of cocoonsas well as prevailing abiotic factors there around.Hence,the efforts were made to study the performance of different tasar silkworm grainage houses viz., green shade net grainage house (GSNGH), tubular structure grainage house (TSGH) and pucca grainage houses (PGH) in terms of maintaining abiotic factors especially temperature and relative humidity.Each of these grainage houses and the space beside these grainage houses that is natural condition were provided with the instruments to record the temperature and relative humidity. The data on maximums of temperature and mid-day relative humidity were recorded on daily basis. The temperature in grainage houses varied with the natural conditions, hence no much fluctuations were seen whereas the relative humidity in GSNGH and PGH was similar to natural conditions. It is deduced that the GSNGH house followed by PGH and TSGH are best for tasar silkworm grainage in terms of availability and maintenance of optimum temperature and relative humidity.