Porter's citrus whitefly

Porter's citrus whitefly (Aleurothrixus porteri) is a small insect species belonging to the family Aleyrodidae, order Hemiptera. Originally native to South America, it has established itself in several citrus-growing regions globally, causing significant economic damage to plantations.

This pest primarily attacks various species of the genus Citrus, showing a strong preference for tender young foliage. By colonizing the underside of the leaves, the insect population can rapidly increase, leading to a severe decline in plant vigor if not managed appropriately.

The life cycle of Aleurothrixus porteri consists of the egg stage, three nymphal instars, a pupal stage, and the winged adult. The nymphs are particularly damaging as they remain stationary while feeding on phloem sap, extracting essential nutrients and water from the host plant throughout their developmental period.

Damage is characterized by leaf curling, yellowing, and leaf drop. A secondary effect of their feeding is the production of copious amounts of honeydew, which serves as a substrate for sooty mold fungi. This fungal growth physically blocks light and interferes with gas exchange, hindering the plant's photosynthetic capacity.

• Regular orchard scouting and monitoring for whitefly colonies.
• Installation of yellow sticky traps to track adult flight activity.
• Use of natural enemies, including parasitoid wasps and predatory beetles.
• Application of horticultural oils or systemic insecticides when thresholds are exceeded.
• Sanitation practices, including pruning and destruction of heavily infested twigs.