Mastic psyllid

Systematic position. The mastic psyllid (Slavum lentiscoides) belongs to the order Hemiptera, family Psyllidae. This insect is a specialized herbivore known for its ability to induce galls on its host plants, reflecting a long-term evolutionary relationship with members of the Anacardiaceae family.

Affected crops. The primary host plant for this species is the mastic tree (Pistacia lentiscus). Because of its highly specific nutritional requirements, the pest is generally confined to regions where this plant species naturally thrives, posing a localized threat to native vegetation and landscape plantings.

Biology and life cycle. The life cycle is intricately linked to the budding and development of Pistacia lentiscus leaves. Female adults lay eggs on tender shoots, and upon hatching, the nymphs begin feeding. This feeding process triggers the formation of galls, which serve as both a food source and a protective shelter for the developing nymphs until they reach maturity.

Damage and severity. The primary damage is characterized by the presence of gall formations on the foliage. These galls interfere with the host plant's physiological processes, leading to reduced photosynthetic efficiency, stunted growth of the shoots, and potential premature leaf drop, which weakens the overall vigor of the mastic tree.

• Regular field monitoring to detect early stages of gall development.
• Physical removal and destruction of infested plant parts to reduce the next generation.
• Encouraging natural predators such as ladybirds and lacewings in the garden.
• Use of systemic insecticides only when necessary during the early stages of nymph activity.