Effect of relative humidity on factors of seed cocoon production in some inbred silk worm (Bombyx mori) lines

Hussain, M.; Khan, S.A.; Naeem, M.; Ata-ul-Mohsin

Effect of relative humidity on factors of seed cocoon production in some inbred silk worm (Bombyx mori) lines

2011

Hussain, M. (Pir Mehr Ali Shah Arid Agriculture Univ., Rawalpindi (Pakistan)) | Khan, S.A. (Sericulture Research Laboratory, Lahore (Pakistan)) | Naeem, M. (Pir Mehr Ali Shah Arid Agriculture Univ., Rawalpindi (Pakistan)) | Ata-ul-Mohsin

The evaluation of silk worm lines for seed cocoon production was studied in humidity stress conditions during spring 2009. The selected silk worm lines viz. Pak-1, Pak-2, Pak-4, PFI-1, M-103, M-107 were reared at 25 plus minus 1 degree C in combination with different relative humidity (RH) levels i.e., 80 plus minus 5% (control), 50%, 60%, 70% and 90% RH. The maximum fecundity (number of eggs laid by a single moth) was observed at 80% RH (436) followed by 70% RH (320), 60% RH (305) and 90% RH (218). The highest hatchability was observed at RH of 80% (88.66) followed by 90% (71.05), 50% (70.28) and 60% (60.10). The best pupation occurred at 80% RH (88.44) followed by at RH of 70% (81.44), 60% (73.16) and 50% (68.94). T

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