Watermelon worm (also known as Armadillidium, woodlice, are invertebrates Arthropoda Crustacea woodlice suborder.) Like to eat decaying plants. The cabbage leaves or other vegetable leaves, cleaned, entire folded into the container of soil. As Armadillidium like wet, dark environment, so common Armadillidium drilling, and lay the folded leaves following feeding. 1 to 2 days, can be seen feeding on the leaves left behind after a number of holes. 2 to 3 days, put on new leaves.