Temperature and Relative Humidity-Mediated Immature Development and Adult Emergence in the Mulberry Silkworm Bombyx mori L.

The information presented in this article suggests that the larger the silkworm breeding organization (SBO), the harder it is to maintain a comfortable temperature, relative humidity, and other environmental factors, resulting in the development of silkworm cocoons. differently, the process of implementing agro-technical measures is disrupted. As a result, industrial cocoons are reported to have a yield of 14-17%, viability 22-25%, worm life 7-9 days and silkworm cocoons 7-13%.

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Studies on the Mode of Action of the Diapause Hormone in the Silkworm, BOMBYX MORI L.,

Journal of Experimental Biology ◽

10.1242/jeb.40.3.517 ◽

1963 ◽

Vol 40 (3) ◽

pp. 517-530

Author(s):

KINSAKU HASEGAWA

Keyword(s):

Low Temperature ◽

Juvenile Hormone ◽

Bombyx Mori ◽

Mode Of Action ◽

Adult Emergence ◽

Suboesophageal Ganglion ◽

Bombyx Mori L ◽

Diapause Hormone ◽

The Brain ◽

Silkworm Bombyx Mori

1. The action of the diapause hormone has been studied by injecting extracts of the heads of male moths or of the brain-suboesophageal ganglion complexes of pupae into pupae expected to produce non-diapause eggs. 2. The effect of the injection of hormone upon young oocytes is to make them develop into diapause eggs. Older oocytes, which have already acquired non-diapause characters, are not affected. 3. The hormone is almost completely inactivated when injected on the day of pupation. The hormone is most effective when injected into pupae 2-3 days old, at which stage the ovarioles have started to grow vigorously. It is ineffective 1-2 days before adult emergence, by which time all the oocytes have acquired non-diapause characters. 4. The hormone is inactivated in all pupae irrespective of whether they are destined to produce diapause eggs or non-diapause eggs. Inactivation of diapause hormone (in contrast to that of juvenile hormone) is partially relieved by exposure to low temperature or by simultaneous injection of indian ink. 5. The extracts prepared as in (1) above do not serve as a stimulant for the brain causing the suboesophageal ganglion to produce diapause hormone. The action of the extract faithfully reflects the function of the diapause hormone which originates in the suboesophageal ganglion.

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Evaluation and Identification of Superior Polyvoltine Crossbreeds of Mulberry Silkworm, Bombyx mori L.

Journal of Entomology ◽

10.3923/je.2009.188.197 ◽

2009 ◽

Vol 6 (4) ◽

pp. 188-197 ◽

Cited By ~ 4

Author(s):

C. Ramesha ◽

S.V. Seshagiri ◽

C.G.P. Rao

Keyword(s):

Bombyx Mori ◽

Bombyx Mori L ◽

Mulberry Silkworm ◽

Silkworm Bombyx Mori

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Effect of Thermal Processing on Physico-Chemical and Antioxidant Properties in Mulberry Silkworm (Bombyx mori L.) Powder

Foods ◽

10.3390/foods9070871 ◽

2020 ◽

Vol 9 (7) ◽

pp. 871 ◽

Cited By ~ 1

Author(s):

Artorn Anuduang ◽

Yuet Ying Loo ◽

Somchai Jomduang ◽

Seng Joe Lim ◽

Wan Aida Wan Mustapha

Keyword(s):

Bombyx Mori ◽

Thermal Processing ◽

Antioxidant Activities ◽

Radical Scavenging ◽

Hot Water ◽

Frap Assay ◽

Drying Temperature ◽

Bombyx Mori L ◽

Mulberry Silkworm ◽

Silkworm Bombyx Mori

The mulberry silkworm (Bombyx mori L.) is a common edible insect in many countries. However, the impact of thermal processing, especially regarding Thai silkworm powder, is poorly known. We, therefore, determined the optimum time for treatment in hot water and subsequent drying temperatures in the production of silkworm powder. The silkworms exposed to 90 °C water for 0, 5, 10, 15, and 20 min showed values of Total Phenolic Compounds (TPCs), 2,2-Diphenyl-1-picrylhydrazyl free radical scavenging (DPPH) assay, 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assay, and Ferric Reducing Antioxidant Power (FRAP) assay that were significantly (p < 0.05) higher at the 5 min exposure time compared with the other times. The reduction of microorganisms based on log CFU/g counts was ≥3 log CFU/g (99%) at the 5 min treatment. To determine the optimum drying temperature, the silkworms exposed to 90 °C water for 5 min were subjected to a hot-air dryer at 80, 100, 120, and 140 °C. The TPC value was the highest (p < 0.05) at 80 °C. The silkworm powder possessed significantly (p < 0.05) higher DPPH, ABTS radical scavenging ability, and ferric ion reducing capability (FRAP assay) at 80 °C compared with other drying temperatures. This study indicates that shorter exposure times to hot water and a low drying temperature preserve the antioxidant activities. High antioxidant activities (in addition to its known protein and fat content) suggest that silkworms and silkworm powder can make a valuable contribution to human health.

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