Evaluation of host plants’ nutrition on life cycle, economic traits and nutrition value of eri silkworm (Samia ricini Donovan)
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Abstract
The eri silkworm is important in the textile industry. The pupae, a byproduct of silk yarn production, are highly nutritious. Eri silkworms can be reared on various host plants, each affecting their production and nutritional value differently. Eri silkworms fed on castor leaves resulted to high in crude protein (26.04%dm) which showed shorter larval and pupal development times (18.70 and 21.70 days, respectively), and higher values for mature larval weight (6.18 g), cocoon weight (2.60 g), pupa weight (2.28 g), and fresh cocoon weight per 10,000 larvae (26.00 kg), all of which were statistically significant (p<0.05) compared to those fed on cassava leaves. Additionally, these silkworms showed the highest contents of crude protein (69.64%dm), crude fat (9.42%dm), crude fiber (5.97%dm), and ash (4.41% dm), which were significantly different (p<0.05) from those reared-on cassava leaves. The pupae reared on castor leaves had high crude protein content (70.66%dm), similar to KU50 (70.81%dm) and HuayBong 60 (69.59%dm). The pupae reared on Rayong72, KU50, Rayong 11, and Huay Bong 60 had the highest levels of crude fat, crude fiber, carbohydrate, and ash, respectively. Castor leaves are optimal for rearing eri silkworms to increase productivity and enhance their nutritional value for use as food for humans and animals.
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