Acanthaspidiotus borchsenii

Acanthaspidiotus borchsenii is a specialized scale insect species belonging to the family Diaspididae within the order Hemiptera. This pest is named after the renowned entomologist N.S. Borchsenii, who dedicated his life to studying armored scale insects. Its presence in plantations can lead to serious horticultural problems if left unmanaged.

The pest primarily infests woody plants, particularly focusing on the bark and twigs. By inserting their mouthparts into the plant tissue, these insects extract vital nutrients and sap, which severely impacts the host's vigor. It is frequently found on various ornamental species, making it a significant concern for nursery owners and park managers alike.

The life cycle of this scale insect is characterized by a sedentary adult stage protected by a hard, waxy shield. Female insects lay eggs under these protective coverings, from which mobile crawlers emerge. These crawlers are the primary dispersal stage, moving across the plant surface or being transported by wind to new colonization sites, which facilitates the spread of the infestation.

Damage caused by Acanthaspidiotus borchsenii manifests as chlorosis, stunted growth, and bark necrosis. As the colony grows, the accumulation of insects can cause branches to dry out and eventually die. The cumulative stress makes the host plant significantly more susceptible to secondary infections by fungi or other opportunistic pathogens, potentially leading to the death of the entire plant.

Effective management requires an integrated approach that targets the most vulnerable life stages. Monitoring is essential to time chemical applications correctly, as once the scale insects form their protective shields, they become resistant to most contact insecticides.

• Regular inspection of bark and foliage for signs of infestation.
• Pruning and destroying heavily infested branches.
• Application of systemic insecticides during the crawler activity period.
• Utilization of horticultural oils to suffocate the overwintering population.