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Separation of Almond Moth [Cadra cautella (Walker)] Eggs and Residual Scales Using Cyclonic Separation
Schematic and image of the cyclonic separator (A) and the eggs of <i>Cadra cautella</i> proceeding scale separation (B).
Schematic and image of the cyclonic separator (A) and the eggs of Cadra cautella proceeding scale separation (B).

Author:Bei-Chen Hsiu, Jih-Zu Yu, Yew-Jen Dong, Feng-Chyi Lin, and Ming-Yao Chiang*

Abstract:

    Almond moth [Cadra cautella (Walker)] eggs are a critical type of factitious prey for beneficial insect enemy species. However, the residual adhesive scales on the eggs create commercial inconveniences. In previous attempts to solve these problems, conventional sieving device could not completely detach the scales from the moth eggs, and increased equipment size. This study used conventional sieving device and cyclonic separation to detach almond moth eggs from the adhesive scales. There were no significant differences were observed for the broken eggs and the hatch rate between the two separation methods. However, the residual scale per moth egg and egg lost rate differed significantly from cyclonic separation method and conventional sieving device (0.1 piece ± 0.0 piece vs. 4.7 piece ± 0.2 piece; 0.3% ± 0.3% vs. 10.5% ± 1.0%). This cyclonic separation method using a simple device is efficient for egg-scale detachment and thus has potential for use in almond moth rearing.

Key words:Cyclonic separation, Almond moth [Cadra cautella (Walker)], Egg, Scale

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Journal of
Taiwan Agricultural Research
Vol. 73, No.1 (2024) ISSN: 2790-086X Vol. 73, No.1 (2024)
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