Grapevine clearwing moth

The Grapevine clearwing moth (Synanthedon bibiopennis) is a pest belonging to the order Lepidoptera and the family Sesiidae. These insects are notable for their mimicry, as adult moths bear a striking resemblance to wasps, which helps them evade avian predators in the vineyard environment.

This species primarily targets grapevines as its host plant. The larvae are borers, meaning they feed internally within the woody tissue of the vine. By creating tunnels inside the stems, arms, and trunks, they disrupt the vascular system, significantly hindering the plant's ability to transport water and nutrients.

The life cycle typically spans one to two years depending on the climate. The majority of the life cycle is spent as a larva, tunneling through the woody parts of the vine. The adult stage is relatively short, focusing on mating and oviposition on the bark or near buds, after which the new generation of larvae bores into the vine.

The economic impact of this pest is severe due to its cryptic nature. Damage is often internal and goes unnoticed until visible signs of plant stress appear, such as wilting, stunted growth, or the sudden death of mature vine branches. Heavy infestations can lead to the total collapse of the vine stock.

Integrated pest management strategies are essential for effective control:

• sanitary pruning to remove and destroy infested wood;
• monitoring adult emergence using pheromone or light traps;
• application of insecticides targeted at the time of egg-laying or neonate larval penetration;
• strengthening vine vigor through proper irrigation and fertilization programs.