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Effect of photoperiod on some biological parameters and utilization of food of the mulberry silkworm Bombyx mori l. (Lepidoptera: Bombycidae) [electronic resource].

By:

Aly, Somaia E

Language: English Summary language: Arabic Description: p.7141-7146Other title:

تأثير الفترة الضوئية على بعض القياسات البيولوجية والتمثيل الغذائى لدودة حرير القز موراى (رتبة حرشفية الأجنحة:نوكتوادى).‪ [Added title page title]

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Mansoura University journal of agricultural sciences, 2005 v. 30 (11) [electronic resource].

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In: Mansoura University Journal of Agricultural Sciences 2005.v.30(11)Summary: The effect of photoperiod on the relative developmental speed of fifth instar larvae of mulbeny silkworm Bombyx mori were studied. Tested photoperiodic conditions were: 24 hours light:0 hours darkness(24L:0D), (12L:12D) and 0L:24D). The mean weight of each of mature larvae, pupae, shell cocoon and silk glands significantly increased under complete darkness. Also, the other biometric measurements ,i.e, the total mean laid eggs/female and utilization of food increased significantly under complete darkness compared with those reared under other tested photoperiods.

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The effect of photoperiod on the relative developmental speed of fifth instar larvae of mulbeny silkworm Bombyx mori were studied. Tested photoperiodic conditions were: 24 hours light:0 hours darkness(24L:0D), (12L:12D) and 0L:24D). The mean weight of each of mature larvae, pupae, shell cocoon and silk glands significantly increased under complete darkness. Also, the other biometric measurements ,i.e, the total mean laid eggs/female and utilization of food increased significantly under complete darkness compared with those reared under other tested photoperiods.

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