What is the most common insect that attacks rose flowers?

The most common insect that attacks rose flowers is aphids. Aphids are small, soft-bodied insects that are often found on the tips of new growth and can be a significant pest for roses. They feed by sucking the sap from the plant, which can lead to distorted leaves, stunted growth, and a decrease in flower quality. Additionally, aphids excrete a sticky substance known as honeydew, which can attract other pests and lead to sooty mold growth on the plants.

While thrips can also damage roses by feeding on the flowers and causing blemishes, they are not as prevalent as aphids. Spider mites tend to affect roses under drought conditions and are more associated with foliage damage than direct flower damage. Leafcutter bees are generally benefical pollinators and do not pose a threat to the roses themselves. Therefore, aphids stand out as the most common and impactful insect pest for rose flowers.