Which of the following is not a recognized pest in citrus and grapes?

The correct answer is that the citrus leaf miner is not a recognized pest in citrus and grapes. The citrus leaf miner is primarily a pest that affects citrus trees, specifically targeting the leaves and causing distinctive damage characterized by tunneling and leaf distortion. While it is a significant pest in the citrus industry, it does not have a direct impact on grapevines, making it irrelevant in the context of grape pest management.

In contrast, Planococcus citri, commonly known as the cottony cushion scale, affects both citrus and grape crops, leading to various issues, including reduced vigor and fruit quality. Similarly, Pseudococcus calceolariae and Pseudococcus longispinus, both types of mealybugs, are known pests that can infest both citrus and grape plants, causing harm through feeding on sap which can further lead to the excretion of honeydew—a perfect medium for sooty mold growth. Therefore, those pests are recognized as threats in both crops, unlike the citrus leaf miner.