Common White Wave

The Common White Wave (Cabera pusaria) is a moth belonging to the Geometridae family, order Lepidoptera. It is a common species across the Palearctic region, often found in woodland areas, hedgerows, and gardens containing host trees.

This pest primarily attacks various deciduous trees. Its preferred host plants include birch, alder, and willow, though it can occasionally affect other ornamental and fruit-bearing trees. The larvae are responsible for the damage caused during the feeding process.

The biology of the species follows a typical metamorphic cycle. Depending on the latitude, the moth produces one or two generations per year. The adult moths are active from late spring to summer. Eggs are deposited on the leaves of the host tree, and the resulting larvae feed extensively before pupating in the soil or leaf litter for the winter.

Damage to host plants manifests as irregular holes in the leaves or total defoliation in cases of severe infestation. As the caterpillars grow, their consumption rate increases significantly, which can cause physiological stress to the trees, leading to stunted growth or weakened defense mechanisms.

Effective management and control strategies include several practices:

• Regular monitoring of tree foliage for early signs of caterpillar activity.
• Applying biological pesticides containing Bacillus thuringiensis when larvae are in their early instars.
• Maintaining healthy tree vigor through proper watering and soil fertilization to improve resistance.
• Encouraging natural predators such as predatory beetles, birds, and parasitoid wasps which naturally limit the population density of the moth.