Grass blue butterfly

Zizina labradus

Larvae are up to 10 mm long, slug- like, green with a white line along either side of the body and a dense covering of short white hairs.
Larvae are slow moving. Butterflies are 16 mm long and have blue-grey wings with dark margins on the upper surface. Wings are held vertically together at rest. Antennae have a knob at the tip.

Larvae usually feed on leaves and growing points but can also attack flowers and pods. Significant terminal damage can result in pods being set close to the ground.

Check all crop stages. Likely to be abundant during warmer months.

Crops attacked
Soybean, lucerne and related pasture legumes.

Similar to
Pea blue butterfly.

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