Neokolla severini

Neokolla severini is a species of leafhopper belonging to the order Hemiptera and the family Cicadellidae. As an agricultural pest, it primarily affects perennial crops, acting as a sap-sucking insect that can cause significant physiological stress to the host plants it colonizes.

The pest is known to feed on a variety of woody plants, with a notable impact on viticulture. Due to its host range, it often survives in adjacent wild vegetation, making complete eradication in agricultural settings challenging without consistent and thorough monitoring of surrounding hedgerows.

The biology of Neokolla severini involves a gradual metamorphosis, progressing from eggs to nymphs and finally reaching the adult stage. The nymphs are particularly active during the spring and summer months, coinciding with the period of rapid plant growth, which allows them to thrive by feeding on the nutrient-rich phloem sap.

Feeding damage is characterized by chlorotic spotting on leaves, curling, and overall stunted growth of the plant shoots. Beyond direct sap depletion, the pest is a concern because of its potential role as a vector for various phytoplasmas, which can lead to diseases that severely compromise the yield and overall health of the vineyard.

Management strategies for this pest focus on early detection and integrated pest management (IPM) practices. Key methods include the removal of host weeds, the installation of sticky traps for monitoring population spikes, and the application of targeted insecticides when nymph numbers exceed economic thresholds. Proper timing is crucial to maximize efficacy and minimize the impact on beneficial insects.