There are 2-3 generations per year. In spring, the adults start laying eggs (approximately 20 per day). These eggs are deposited separately or in groups on short stalks on the underside of the leaves. After 3 days, the first larval stage develops.
The third larval stage is the most important one for biological control, as it represents 80% of the total amount of food taken. The larvae are approximately 0.8 mm and eat up to 50 aphids per day.
Please ensure no ants are present in the area where the lacewing larvae are going to be placed as it will severely reduce the efficiency. Insect Barrier Glue or glue bands may be used to stop ants crawling up plants and trees.
Biological Control
Lacewings
Lacewing larvae can be introduced in different fruit and vegetable crops, and ornamentals against different kinds of aphids. The larvae eat thrips, red spider mite, whitefly, small caterpillar eggs and mealy bugs.
As the larvae cannot fly, they need to be able to reach their prey; the larvae should therefore be placed near the aphids. The larvae are able to move 4-5 km before they become adults.
The advantage of using larvae is the fact that they work immediately.