Egg The egg stage of mythimna scirpi is where development begins, usually on or near the future food source. The eggs are tiny, spherical, and often laid in clusters. The color and texture can vary, but they generally exhibit a protective outer layer that blends with the surroundings.
Larva As larvae, mythimna scirpi undergo several molts and growth periods, known as instars. They are worm-like with a soft body, varying from bright to muted colors, which may serve as camouflage or warning. Larvae are primarily focused on feeding and growth.
Pupal During the pupal stage, mythimna scirpi transforms within a cocoon or chrysalis. The pupal case may be attached to foliage or buried in the ground. Inside, the organism is undergoing significant reorganization, preparing to emerge as an adult, with no feeding occurring.
Adult Emerging from the pupa, the adult mythimna scirpi displays the hallmark characteristics of the order Lepidoptera, with wings covered in scales, used for flight and attracting mates. The body is also fully hardened, and adults are mobile, focusing on reproduction and, in some cases, feeding.