Caterpillars of the vine moth (Phalaenoides glycine) are one of the most common pests of the grape vine, and if allowed to remain unchecked may seriously damage the young hunches and defoliate the vines. In addition to feeding on vines, they also feed on the leaves of fuchsias. The recorded native food-plants are Gnaphalium luteoalbum, Hibbertia linearis and Glycine sp. .Household grape vines are especially subject to heavy infestation by these caterpillars.

The moths, which measure about 2; inches across the outspread wings, are black with yellow markings. There is an orange-coloured tuft of hairs at the tip of the abdomen and orange markings beneath the body. The male may be distinguished by the presence of a distinct yellow spot in the centre of the upper-surface of the hind wings.

The eggs are somewhat flattened and finely ridged and are deposited on the stems and leaves.

The fully-fed caterpillar measures about 2 inches in length and is greenish-yellow marked with numerous, short, transverse, irregular black lines and several reddish spots. The body is covered with long, fine, white hairs. They occur on the vines in spring and summer.

The pupal or chrysalis stage is passed in the ground within a cell, but under certain conditions the larvae may cement leaves and rubbish together and pupate therein. Pupae may overwinter in the soil, moths emerging from them in the spring at about the time the vines come into leaf. The pupa is dull reddish-brown and measures slightly less than an inch in length. Several generations
occur during the year.