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<p>With the expected global population reaching 9.3 billion by 2050 and the need for 70% more food, addressing food security is imperative. Insect farming is an emerging solution, and <i>Tenebrio molitor</i> (mealworm) is a popular choice due to its ease of rearing, harvesting, and feeding. This study aims to assess how dietary factors affect the body length and weight of <i>T. molitor</i> larvae. Seven diets were prepared, ranging from pure wheat bran (W) as a control to combinations of barley (A, B), chickpea (C, D), and corn (E, F) brans. The type of food significantly influenced the larval and adult insect weight and length. Larvae fed diet W (122.99 mg) and diet D (114.99 mg) showed the highest and lowest weight, respectively. Insects fed with diet W showed the longest length (1.30 cm), while those fed with diet C had the shortest length (1.21 cm). Focusing on the fourth larval stage onwards resulted in low mortality rates. However, diets C (97.7% survival) and B (98.8% survival) exhibited the lowest survival rates. Larval pupation rates differed significantly, with 43.3% of larvae on a 100% wheat bran diet pupating by the 13th instar, compared to 32.9% on a 50% corn bran diet by the 15th instar. These findings emphasize the significant impact of diet on the development of <i>T. molitor</i>. As the global demand for sustainable food sources grows to address future food security challenges, understanding these dietary factors in insect farming is essential.</p>

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Comparative Impact of Seven Bran Diets on the Growth, Development and Survival Rate of Tenebrio molitor Linnaeus 1758 (Coleoptera: Tenebrionidae) Larvae

  • 期刊论文

  • 发表日期：

    2025年9月17日

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  • Raziye Rashidi Ilzoleh,
  • Vahid Akmali

摘要

With the expected global population reaching 9.3 billion by 2050 and the need for 70% more food, addressing food security is imperative. Insect farming is an emerging solution, and Tenebrio molitor (mealworm) is a popular choice due to its ease of rearing, harvesting, and feeding. This study aims to assess how dietary factors affect the body length and weight of T. molitor larvae. Seven diets were prepared, ranging from pure wheat bran (W) as a control to combinations of barley (A, B), chickpea (C, D), and corn (E, F) brans. The type of food significantly influenced the larval and adult insect weight and length. Larvae fed diet W (122.99 mg) and diet D (114.99 mg) showed the highest and lowest weight, respectively. Insects fed with diet W showed the longest length (1.30 cm), while those fed with diet C had the shortest length (1.21 cm). Focusing on the fourth larval stage onwards resulted in low mortality rates. However, diets C (97.7% survival) and B (98.8% survival) exhibited the lowest survival rates. Larval pupation rates differed significantly, with 43.3% of larvae on a 100% wheat bran diet pupating by the 13th instar, compared to 32.9% on a 50% corn bran diet by the 15th instar. These findings emphasize the significant impact of diet on the development of T. molitor. As the global demand for sustainable food sources grows to address future food security challenges, understanding these dietary factors in insect farming is essential.