Recent Advances in Silkworm Nutrition

Legay, Jean-Marie

doi:10.1146/annurev.en.03.010158.000451

Cited by 64 publications

(38 citation statements)

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“…In commercial crop seasons (autumn and spring) the quantitative traits are stressed due to congenial weather and quality of feed. Legay [30] found that cocoon production is chiefly dependent on larval nutrition and nutritive value of mulberry leaves and conversion efficiency of larvae which is affected by weather conditions. Khawaja [31] reared silkworm larvae during autumn and spring and stated that higher temperature and humidity resulted in poor growth and low quality cocoons.…”

Section: Cocoon Yield (Kg Per 10000 Larvae)mentioning

confidence: 99%

Evaluation of Silkworm Lines against Variations in Temperature and RH for Various Parameters of Commercial Cocoon Production

Hussain

Khan²,

Naeem

et al. 2011

Psyche: A Journal of Entomology

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Eleven inbred silkworm lines (M-101, M-103, M-104, M-107, Pak-1, Pak-3, Pak-2, Pak-4, PFI-1, PFI-2, and S-1) were evaluated for various parameters of cocoon production under different temperature and relative humidity conditions (25±1, 30±1, and 35±1• C in combination with 55, 65, and 75% RH for three hrs during 4th and 5th instar. The experiment was laid out in factorial design with three replications. Significant variations in the performance of silkworm lines were noticed due to influence of temperature and RH treatment on 4th and 5th instar larvae. The silkworm lines performed significantly better when the larvae were reared at 25 ± 1• C with 70-80% RH while almost all the silkworm lines showed poor performance at higher temperature exposures for 3 hrs. Exposures to lower humidity (55%) during larval rearing in 4th and 5th instar at different temperatures (25 ± 1, 30 ± 1, and 35±1• C) resulted in lowering the cocoon production. The cumulative evaluation index values for different traits showed that Pak-4 (61.42) was the best line followed by M-101 (59.15), Pak-2 (56.37), Pak-3 (52.83) PFI-I (52.62), and M-107(50.03). The study clearly underlines the importance of optimization of environmental conditions during larval rearing in relation to commercial cocoon production. The investigations strongly recommend that temperature and relative humidity in the range of 25-26• C and 70-80%, respectively, are mandatory for excellent results of cocoon production and Pak-4, M-101, Pak-2, Pak-3, PFI-I, and M-107 were suitable for commercial rearing.

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Section: Cocoon Yield (Kg Per 10000 Larvae)mentioning

confidence: 99%

Evaluation of Silkworm Lines against Variations in Temperature and RH for Various Parameters of Commercial Cocoon Production

Hussain

Khan²,

Naeem

et al. 2011

Psyche: A Journal of Entomology

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“…Legay (1958) relatou que a produção de seda é diretamente dependente da nutrição larval, sendo que o valor nutritivo das folhas da amoreira é essencial para a produção de casulos com fios de seda de alta qualidade. Ainda, nos anos 1950, autores como Seki;Oshikane (1959) observaram melhor desenvolvimento das lagartas do bicho-da-seda, bem como a produção de casulos de melhor qualidade, quando as folhas eram tratadas com aditivos nutricionais.…”

Section: Palavras-chaveunclassified

Efeito de vitaminas e esterol como aditivos foliares no desenvolvimento de Bombyx mori L. e influência do modo de aplicação

et al. 2014

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O objetivo deste estudo foi avaliar os efeitos e os métodos de aplicação dos aditivos foliares decanoato de nandrolona (esteroide anabolizante) a 0,5%, ácido ascórbico (vitamina C) a 0,5%, palmitato de retinol (vitamina A) a 0,5% e acetato de retinol (vitamina A) a 1,0% em alguns parâmetros biológicos do bicho-da-seda. No experimento do modo de aplicação (pulverização foliar antes do fornecimento, depois do fornecimento e por imersão antes do fornecimento) foram utilizados: decanoato de nandrolona 0,5%; ácido ascórbico 0,5%; e palmitato de retinol 0,5%. No ensaio de desenvolvimento do inseto foram avaliados: duração e viabilidade larval; peso de casulo; taxa de encasulamento; teor líquido de seda; longevidade de adultos; número de ovos por fêmea; e duração do período de subida ao bosque. Para o modo de aplicação determinaram-se: ganho de peso, comprimento, diâmetro do tórax e diâmetro do abdome de lagartas de 5º ínstar, assim como comprimento, diâmetro e peso de glândula sericígena. Os resultados mostraram que, apesar de o ácido ascórbico proporcionar os melhores valores para o desenvolvimento corpóreo das lagartas, este não corresponde a incrementos significativos na produção; o palmitato de retinol não melhora o desenvolvimento das lagartas; o acetato de retinol e o palmitato de retinol prolongam o período larval, sem, no entanto, alterar significativamente os parâmetros de produção; a imersão de folhas antes do fornecimento às lagartas é mais viável para a aplicação dos aditivos.

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“…Legay, (1958) has stated that silk production is dependent on the larval nutrition and nutritive value of mulberry leaves plays a very effective role in producing good quality cocoons. Seki and Oshikane, (1959) have observed better growth and development of silkworm larvae as well as good quality cocoons when fed on nutritionally enriched leaves.…”

Section: Industrial Entomologymentioning

confidence: 99%

Studies on the Growth Rate of Silkworm Bombyx mori (L.) (Lepidoptera: Bombycidae) Fed with Control and Silver Nanoparticles (AgNps) Treated MR₂Mulberry Leaves

Prabu¹,

Selvi²,

Mathivanan³

et al. 2011

International Journal of Industrial Entomology

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To evaluate the growth rate of larval and pupal parameters of silkworm Bombyx mori fed with Silver Nanoparticles (AgNps) treated MR 2 mulberry leaves, the following works have been considered. The AgNp was synthesized by chemical reduction method, it was diluted by different concentrations such as 25%, 50%, 75% and 100% (without dilution). Fresh mulberry leaves (Morus alba L.) were sprayed by each concentration and were fed to silkworms, from 3 rd , 4 th and 5 th instar, five feedings/day. Group T 1 larvae received MR 2 mulberry leaves sprayed with distilled water and served as control, group T 2 , T 3 , T 4 and T 5 larvae received 25%, 50%, 75% and 100% AgNps sprayed mulberry leaves, respectively. Silkworm larvae fed on M. alba (MR 2 ) leaves sprayed with 25% concentration of AgNps (group T 2 ) was significantly increased the larvae and cocoon length, width and weight as compared to those fed on control (group T 1 ) MR 2 mulberry leaves and other groups (T 3 , T 4 and T 5 ). Hence, 25% AgNps dose was fixed as an effective dose. It has been observed from the present study that 25% AgNps treated (group T 2 ) leaves fed by silkworms have enhanced the larval and pupal growth and quantity of silk production than control.

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Recent Advances in Silkworm Nutrition

Cited by 64 publications

References 0 publications

Evaluation of Silkworm Lines against Variations in Temperature and RH for Various Parameters of Commercial Cocoon Production

Evaluation of Silkworm Lines against Variations in Temperature and RH for Various Parameters of Commercial Cocoon Production

Efeito de vitaminas e esterol como aditivos foliares no desenvolvimento de Bombyx mori L. e influência do modo de aplicação

Studies on the Growth Rate of Silkworm Bombyx mori (L.) (Lepidoptera: Bombycidae) Fed with Control and Silver Nanoparticles (AgNps) Treated MR₂Mulberry Leaves

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Recent Advances in Silkworm Nutrition

Cited by 64 publications

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Evaluation of Silkworm Lines against Variations in Temperature and RH for Various Parameters of Commercial Cocoon Production

Evaluation of Silkworm Lines against Variations in Temperature and RH for Various Parameters of Commercial Cocoon Production

Efeito de vitaminas e esterol como aditivos foliares no desenvolvimento de Bombyx mori L. e influência do modo de aplicação

Studies on the Growth Rate of Silkworm Bombyx mori (L.) (Lepidoptera: Bombycidae) Fed with Control and Silver Nanoparticles (AgNps) Treated MR2Mulberry Leaves

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Studies on the Growth Rate of Silkworm Bombyx mori (L.) (Lepidoptera: Bombycidae) Fed with Control and Silver Nanoparticles (AgNps) Treated MR₂Mulberry Leaves