Acutaspis paulista

Acutaspis paulista is a species of armored scale insect belonging to the family Diaspididae, order Hemiptera. In agricultural settings, this pest is recognized for its ability to colonize woody tissues and foliage, creating dense populations that are difficult to manage with conventional spray applications due to the robust protective covers developed by the insects.

The primary host plants for this species include citrus trees and various ornamental plants in tropical and subtropical climates. Its distribution is often linked to international trade, as the scale insects can easily remain hidden on plant nursery stock, making phytosanitary inspections critical for preventing regional outbreaks.

The life cycle of the scale involves egg laying beneath the female's protective shield, followed by the emergence of mobile crawlers. These crawlers are the primary dispersal stage, moving across the plant surface to find suitable feeding sites. Once they settle and begin secreting their waxy covering, they remain sessile for the rest of their development.

Damage to the host plant is caused by the extraction of sap, which disrupts the plant's nutrient transport system. Symptoms include chlorosis, leaf deformation, reduced fruit size, and stunted growth of shoots. In severe infestations, the cumulative stress can lead to branch dieback and an overall decline in plant health, making them susceptible to secondary pathogens.

Integrated Pest Management (IPM) strategies for Acutaspis paulista emphasize prevention. Key approaches include

• monitoring crawler activity to time insecticide applications;
• using horticultural oils to smother the scale shields;
• implementing strict quarantine protocols;
• encouraging the activity of natural enemies like parasitoid wasps.