Qualified Applicator License (QAL) Plant Agriculture Practice Test

The variegated leafhopper found on grapes is scientifically named Erythroneura variabilis. This name reflects the specific genus and species of the insect, which is known for its distinctive coloration and patterns on the leaves it inhabits. Erythroneura variabilis plays a significant role in vineyards, as it can affect grapevines by feeding on their sap, which may lead to various physiological issues in the plant.

Understanding the classification of this pest is essential for integrated pest management strategies. Accurate identification helps in applying the correct control measures, as different species may require different management approaches. For example, Erythroneura variabilis is particularly notable for its ability to transmit grapevine virus diseases, making it crucial for vineyard health and productivity.