Japanese beetles are nasty, little bugs which attack gardens every summer. Japanese beetles have shiny copper-colored wings and green thoraxes; they only live a few weeks, but manage to wreak a lot of havoc in that time. Attracted to the smell of your roses, they invade and devour buds, leaves and blossoms. Some insecticides and traps may work, but to do so, these methods mimic the pheromones that the beetles use to attract each other. Therefore, these insecticides and traps will bring more Japanese beetles to your garden as they combat the pests. Instead, try more natural methods to rid your roses of Japanese beetles.
Pick or shake the Japanese beetles off of your rose bush in the cool early morning when they are least active. They are also less active at the end of the day.
Drop them into a bucket of soapy water to kill them.
Repeat this procedure daily until the infestation is under control.
Plant garlic, catnip or geraniums near your roses in the spring or fall to keep the beetles from returning to your roses. Japanese beetles are repelled by these plants.