Citrus flatid planthopper

The Citrus flatid planthopper (lat. Ormenis pruinosa) is a sap-sucking insect classified under the order Hemiptera and the family Flatidae. It is recognized as a polyphagous pest with a significant impact on both agricultural crops and ornamental landscape plants in various climates.

This pest affects a wide range of host plants, showing a strong preference for grapevines, citrus trees, pome fruits, and numerous ornamental species such as roses or hibiscus. The insect is particularly attracted to young, tender growth where it feeds by inserting its mouthparts into the phloem to extract plant sap.

The biological cycle of Ormenis pruinosa includes one generation per year. The species overwinters in the egg stage, typically laid under the bark or within woody stems. Nymphs emerge in spring and are characterized by their white, waxy, cotton-like secretions, which serve as a defense mechanism against predators. By mid-summer, they mature into winged adults.

Damage caused by the Citrus flatid planthopper includes stunted growth, leaf chlorosis, and general plant weakening. A critical consequence of their infestation is the excretion of honeydew, which serves as a substrate for the development of sooty mold. This fungus blocks sunlight from reaching the leaves, thereby severely hindering the process of photosynthesis.

Effective management strategies for this pest include the following:

• Implementing strict sanitation by pruning and destroying infested plant parts.
• Using yellow sticky traps to monitor and reduce adult planthopper populations.
• Applying systemic or contact insecticides during the nymphal development stage.
• Promoting natural biological control agents like predatory bugs and parasitic wasps.
• Ensuring proper orchard or garden hygiene to eliminate alternative host plants.