Extending the Storage Time of Clanis bilineata tsingtauica (Lepidoptera; Sphingidae) Eggs through Variable-Temperature Cold Storage

Zhu, Chenxu; Zhao, Ming; Zhang, Haibo; Zhang, Fang; Du, Yuzhou; Lu, Mingxing

doi:10.3390/foods10112820

Open AccessArticle

Extending the Storage Time of Clanis bilineata tsingtauica (Lepidoptera; Sphingidae) Eggs through Variable-Temperature Cold Storage

by

Chenxu Zhu

¹

,

Ming Zhao

¹,

Haibo Zhang

²,

Fang Zhang

²,

Yuzhou Du

^1,3

and

Mingxing Lu

^1,*

¹

College of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou 225009, China

²

Plant Protection and Quarantine Station of Jiangsu Province, Nanjing 210009, China

³

Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou 225009, China

^*

Author to whom correspondence should be addressed.

Foods 2021, 10(11), 2820; https://doi.org/10.3390/foods10112820

Submission received: 5 October 2021 / Revised: 11 November 2021 / Accepted: 12 November 2021 / Published: 16 November 2021

(This article belongs to the Special Issue Edible Insects as Innovative Foods: Nutritional, Functional and Acceptability Assessments II)

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Abstract

Clanis bilineata tsingtauica Mell, 1922 (Lepidoptera, Sphingidae), also known as “Doudan” in China, is an important pest in legume crops. As an edible insect, it is most commonly consumed in Jiangsu, Shandong, and Henan Provinces. Mass rearing requires access to large numbers of eggs. This stage, however, is of short duration and supplies are frequently not sufficient for insect production. Therefore, we identified the cold storage conditions for C. bilineata tsingtauica that can effectively prolong the storage time of the eggs, to make supplies more readily available. We found that when stored at 4 °C, only 7.5% of the eggs hatched after 7 days, while at 10 °C the hatch rate was 78.3%. At 15 °C, the egg hatch rate remained at this same level (77.8% even after 14–20 days). Considering various combinations, we found that optimal egg hatch occurred if eggs were stored at 15 °C for 11 days, and then held at 15–20 °C under dark conditions. Stored as described above, the egg hatch rate was not significantly different from the control group (at 28 °C). These conditions allow for easier mass rearing of C. bilineata tsingtauica by providing a stable supply of eggs.

Keywords: Clanis bilineata tsingtauica; edible insects; cold storage; temperature; artificial breeding

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MDPI and ACS Style

Zhu, C.; Zhao, M.; Zhang, H.; Zhang, F.; Du, Y.; Lu, M. Extending the Storage Time of Clanis bilineata tsingtauica (Lepidoptera; Sphingidae) Eggs through Variable-Temperature Cold Storage. Foods 2021, 10, 2820. https://doi.org/10.3390/foods10112820

AMA Style

Zhu C, Zhao M, Zhang H, Zhang F, Du Y, Lu M. Extending the Storage Time of Clanis bilineata tsingtauica (Lepidoptera; Sphingidae) Eggs through Variable-Temperature Cold Storage. Foods. 2021; 10(11):2820. https://doi.org/10.3390/foods10112820

Chicago/Turabian Style

Zhu, Chenxu, Ming Zhao, Haibo Zhang, Fang Zhang, Yuzhou Du, and Mingxing Lu. 2021. "Extending the Storage Time of Clanis bilineata tsingtauica (Lepidoptera; Sphingidae) Eggs through Variable-Temperature Cold Storage" Foods 10, no. 11: 2820. https://doi.org/10.3390/foods10112820

APA Style

Zhu, C., Zhao, M., Zhang, H., Zhang, F., Du, Y., & Lu, M. (2021). Extending the Storage Time of Clanis bilineata tsingtauica (Lepidoptera; Sphingidae) Eggs through Variable-Temperature Cold Storage. Foods, 10(11), 2820. https://doi.org/10.3390/foods10112820

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Extending the Storage Time of Clanis bilineata tsingtauica (Lepidoptera; Sphingidae) Eggs through Variable-Temperature Cold Storage

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