The young larvae are smooth and green with a brown head.

Young larvae live in the top parts of the host plant.

The young larvae mine the lower leaves of their host plant.

The young larvae feed together and but do not make a nest.

Young larvae less than 24 hours old are most susceptible to infection.

The case of young larvae is almost white however.

These cells are made from a cell with an egg or very young larva.

Young larvae bore into the stem, down toward the root.

Very young larvae feed only on the upper surfaces of leaves.

The young larvae live in spun shoots of the host plant.