Older larvae often live free in a web under the leaf.

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

Older larvae live free on the leave, causing window feeding.

The older larva is very striking, black with white and yellow lines.

Older larvae live freely on the plant under some spinning.

Older larvae are light golden brown with a dark brown head.

Older larvae create a shelter of leaves on their host and complete feeding from within.

Older larvae leave the mine and continue feeding in a leaf roll.

Older larvae are green and well camouflaged against the leaves on which they feed.

Older larvae create another case in spring and feed on the upper surface of the leaves without making mines.