Anastrepha bistrigata

Systematic position: Anastrepha bistrigata belongs to the order Diptera and the family Tephritidae. These insects are well-known fruit flies that pose significant economic threats to fruit production in tropical and subtropical regions across the Americas.

Host plants: The primary hosts for this pest are members of the Myrtaceae family, most notably guava (Psidium guajava). Due to its host range, it is considered a major threat to commercial orchards that cultivate guava and related fruit species in its native distribution range.

Biology and life cycle: The life cycle progresses through four stages: egg, larva, pupa, and adult. Females use their ovipositor to deposit eggs beneath the skin of developing fruits. Once hatched, the larvae tunnel through the fruit flesh to feed. After completing their larval development, they typically exit the fruit and pupate in the soil beneath the host plant.

Damage and severity: Damage is primarily caused by larval feeding, which destroys the internal pulp of the fruit and causes premature dropping. The punctures made by the female during oviposition often lead to secondary rot caused by bacteria or fungi. This infestation renders fruits unmarketable and unsuitable for consumption, leading to severe harvest losses.

Protection measures: Integrated pest management (IPM) is essential for controlling Anastrepha bistrigata populations. Recommended strategies include:

• Sanitation by collecting and destroying infested or fallen fruit to reduce pupal populations in the soil.
• Monitoring adult activity using pheromone or protein-based bait traps to time chemical interventions.
• Application of targeted insecticides during periods of peak adult activity.
• Implementation of strict quarantine regulations to prevent the spread of infested fruit to new areas.