The African cotton leafworm (Spodoptera littoralis) lives about five to ten days once adulthood is reached, and the females lay from 20-1,000 white to yellowish eggs on the bottom of a plant's leaves which she coats with scales from her abdomen.
Spodoptera littoralis, also referred to as the African cotton leafworm or Egyptian cotton leafworm or Mediterranean brocade, is a species of moth in the family Noctuidae. The adult moth appears at night and live about 510 days. Female moths lay a batch of eggs that ranges from 201,000 eggs on the lower side of a host plant's leaves. These white-yellow color of the eggs turn black just before hatching due to the presence of black larval head near the transparent shell. After the eggs are laid, female coats the eggs with scales from its abdomen. 
