Weevils are distinguished by large mandibles which extend from the tops of their heads. Palmetto weevils start life as eggs laid in the leaves or damaged areas of a host tree. After about three days, the eggs hatch and the grubs begin to feed on the tissue of the palm. The larvae grow by moulting and with each successive moult their appetites grow. In their final stage, the mature larvae move from deep within the tree to the outer area and spin cocoons around themselves.
Weevils emerge from the cocoons after several weeks to mate.
The entire cycle takes about 12 weeks. Mature insects are most noticeable in late spring and early summer. By the time palmetto weevil damage is noticed, it is generally already too late to save the tree. Damage is first evident in the wilting and dying of younger leaves. As the weevils continue their work inside the tree, the entire crown may weaken and fall over.