Grape leafhopper

Systematic position: Chlorita laurae belongs to the order Hemiptera and the family Cicadellidae. It is a specialized pest that has gained economic importance in various viticulture regions, where it impacts the physiological state of grapevines by actively feeding on plant sap throughout the growing season.

Crops and type of damage: The species primarily attacks grapevines (Vitis vinifera). Both nymphs and adults inhabit the underside of the leaves. Through piercing-sucking mouthparts, they extract plant fluids, leading to localized chlorosis and the development of distinctive white or yellow mottled patterns on the leaf surface, which eventually results in premature senescence.

Biology and life cycle: The life cycle of Chlorita laurae consists of egg, five nymphal instars, and the adult stage. The insect typically overwinters as an adult in sheltered areas, such as leaf litter or cracks in the bark. With the onset of warmer spring weather, mating occurs, and females lay eggs within the leaf tissue, followed by the development of multiple generations per year.

Harmfulness: High population densities of this leafhopper cause significant stress to the vines. Reduced photosynthetic area leads to impaired vine vigor, poorer wood maturation, and a decrease in fruit quality, including sugar content and anthocyanin accumulation. Furthermore, the pest can potentially transmit various plant pathogens, making it a serious concern for vineyard health management.

Control measures: Managing Chlorita laurae requires a combination of cultural and chemical tactics. Key strategies include:

• Maintaining weed-free vineyards to eliminate alternative hosts.
• Monitoring populations using yellow sticky traps to determine the optimal timing for intervention.
• Applying selective insecticides that minimize disruption to beneficial predatory insects in the vineyard ecosystem.