Lobster moth

The Lobster moth (Stauropus fagi) is a distinctive member of the Notodontidae family within the order Lepidoptera. It is widely recognized not for its adult form, which is a grey, cryptic moth, but for its bizarre-looking caterpillar, which resembles a crustacean or a lobster due to its peculiar body shape.

This pest primarily infests a variety of deciduous trees. Its preferred hosts include beech (Fagus), oak (Quercus), birch (Betula), hazel (Corylus), and occasionally fruit trees like apple and plum. The larvae are solitary feeders and are rarely found in large colonies, but they can still cause significant foliage loss.

The life cycle of the lobster moth involves one generation per year, though in warmer climates, a partial second generation may occur. Adult moths emerge between May and July. After mating, females deposit eggs on the leaves of host plants. The larvae hatch and go through several instars before descending to the ground to pupate in a cocoon.

The damage caused by this insect involves defoliation of the canopy. The caterpillar’s defensive behavior is particularly noteworthy: when disturbed, it raises its head and the end of its abdomen, resembling a scorpion or lobster. While usually not a major economic pest in large forests, it can be a nuisance in orchards and gardens.

• Monitor leaf canopy during late spring and early summer for larvae presence.
• Encourage natural predators such as insectivorous birds and parasitic wasps.
• Manual removal of larvae in small or younger ornamental trees.
• Application of biological control agents like Bacillus thuringiensis.
• Use of targeted insecticides if infestation levels threaten the tree's health.