Russian olive psyllid

Systematic position. This pest belongs to the order Hemiptera and the family Psyllidae. As a host-specific insect, it primarily targets species within the genus Elaeagnus, often becoming a significant problem in nurseries and landscaping areas where these trees are planted.

Affected crops and economic impact. The main host plant is the Russian olive (Elaeagnus angustifolia). The infestation typically results in stunted growth of the plant and significant aesthetic damage to the canopy, making the trees less desirable for urban forestry and ornamental purposes.

Biology and life cycle. The life cycle involves overwintering as adults, which emerge in early spring to initiate the breeding season. Females deposit eggs on young buds and shoots. The nymphs pass through several instars while remaining stationary on the leaves, feeding continuously on plant sap.

Nature of damage. The feeding activity of nymphs causes leaf curling, yellowing, and distortion. A hallmark of this infestation is the production of honeydew, which creates a sticky surface on the foliage and often attracts secondary infections, such as sooty mold, further hindering the plant's physiological functions.

• Implement regular visual inspections during the spring growth flush.
• Prune and destroy heavily infested branches to reduce local population density.
• Apply systemic insecticides during the peak of nymphal activity when necessary.
• Maintain proper soil moisture and fertilization to boost the plant's natural resistance.