Rose plants are a beautiful addition to any home and with the proper planting and care, your plants should thrive and bloom. However, roses sometimes are plagued by pests, such as beetles. They eat the leaves and cause irreparable damage. Many types of beetles may be infesting your roses and eating away at their leaves, including the Japanese beetle and Fuller rose beetle. Fortunately, it's possible to eliminate them.
Remove the beetles manually in the morning when the beetles are slower. Shake the leaves or brush the beetles off with a paintbrush or another soft object into a bucket of soapy water to kill them. Look under the leaves as well as on top.
Apply a pesticide labeled as a beetle-killer. These usually have an active ingredient of either permethrin, cyfluthrin, lambda cyhalothrin, carbaryl, deltamethrin, bifenthrin or esfenvalerate. Always adhere to the label instructions when applying any pesticide, but in general spray the entire plant, including the flowers, on a calm day. Repeat as necessary to prevent infestation again.
Remove any lower branches that hang to the ground if you have beetles, such as the Fuller rose beetle, that do not fly. The beetles then cannot access your rose bush from any other place other than the bottom trunk(s). Place a sticky tree band available at most local garden stores around the bottom of the trunk(s) to catch and kill the beetles (and grubs) as they travel up your rose plant.