Which of the following is NOT a pest to citrus?

The correct answer is that "six spotted thrips" is not recognized as a pest to citrus. In the context of integrated pest management for citrus, common pests typically include scales, aphids, and whiteflies, all of which have documented impacts on citrus health and yield. Scales feed on plant sap and can weaken trees, while aphids and whiteflies also sap nutrients and can transmit harmful plant viruses.

Six spotted thrips, however, generally target other types of plants and are not specifically known to inflict significant damage on citrus crops. Their feeding habits and preferred host plants do not align with those commonly associated with citrus, making them less of a concern for citrus growers and pest management strategies.

This differentiation is crucial for effective pest control; recognizing which organisms are harmful (or not) can help in developing targeted and efficient pest management plans.