Citrus psyllid Ober

Diaphorina auberti is a species of jumping plant louse belonging to the family Psyllidae, order Hemiptera. This pest is recognized as a significant threat to citrus production, primarily because it thrives on young, tender tissues of citrus trees, causing substantial physiological stress to the host plants.

The host range is largely confined to citrus species and their close relatives. The pest is particularly attracted to new growth flushes. During these periods, the insects congregate on tender leaves and shoots, which provide the essential nutrients required for the development of both nymphs and adults.

The life cycle of Diaphorina auberti includes the egg, nymph (with five instars), and adult stages. Favorable temperatures and high humidity accelerate their reproductive rate, leading to overlapping generations throughout the growing season. This rapid development makes it difficult to manage the population without persistent surveillance.

Damage caused by this psyllid includes leaf curling, stunted growth of shoots, and severe chlorosis. The insect's feeding process disrupts the vascular system of the plant, while its honeydew secretions promote the growth of sooty mold, which blocks sunlight and reduces the overall photosynthetic capacity of the tree.

Effective management strategies for Diaphorina auberti involve a combination of chemical and cultural methods. These include:

• Regular inspection of citrus groves for early detection.
• Application of systemic insecticides during active flush periods.
• Pruning of infested shoots to reduce local population density.
• Use of yellow sticky traps for monitoring adult presence.