What should be done if spider mites are detected on roses?

When spider mites are detected on roses, applying a miticide is the most effective response because these pests can rapidly reproduce and cause significant damage to the plants. Miticides are specifically designed to target and eliminate spider mites while minimizing harm to the plant and beneficial insects. This treatment addresses the infestation directly and helps to prevent the mites from spreading to other leaves and plants in the vicinity.

Effective management of spider mites is crucial, as they can cause stippling on leaves, browning, and ultimately weaken or kill the plants if not controlled. While removing affected leaves can help reduce the population and mitigate immediate damage, it does not eliminate the mites that remain on the plant. Increasing watering may not have an immediate effect on the mites, and leaving them alone would allow the infestation to continue to grow, potentially leading to more severe plant health issues.

Using a miticide provides a targeted approach to manage the problem efficiently, making it the most recommended action when spider mites are present.