Spodoptera albula

Spodoptera albula View in CoL

The eggs of S. albula are laid by the moths in clusters ranging from 100 to 450 eggs, covered by modified light beige abdominal scales ( Fig. 4A View Figure 4 ). All the ribs are conspicuous and is not possible to classify them into primary and secondary ribs ( Fig. 4A View Figure 4 ). The average number of micropyles is 4 (3–6). The micropylar area of S. albula eggs is surrounded by primary cells in the form of petals and secondary cells with somewhat angular distal ends, similar to the primary cells. Meanwhile, the tertiary and quaternary cells blend with the general reticulation of the chorion ( Figs. 4A and 4B View Figure 4 ). The cross-ribs are less conspicuous than the ribs ( Fig 4D View Figure 4 ). The aeropyles, which typically range in diameter from 0.5 to 1 µm, may or may not be present at the junction points of the ribs and cross-ribs, usually isolated but could be in pairs. They are predominantly located on the top third portion of the egg. ( Figs. 4A and 4C View Figure 4 ). The texture of the chorion surface, observed at a magnification of 8,000x, is irregularly rugged ( Fig. 4D View Figure 4 ).