However, the beetles are quite mobile and new beetles may replace those killed by insecticides. Avoid spraying flowers so as to not kill bees. Fuller rose beetle. Scouting Both larvae and adults are pests. Larvae feed on roots while the adults chew foliage and flowers.
Adults generally feed during the night and are considered to be more damaging.
Control Control is similar to other beetle defoliators. Hand picking at night is an option with low populations. Control is the same as for the rose chafer. Identification Leafcutting bees are similar in size to honeybees, but are blackish in color. Scouting Leafcutting bees cut out sections of rose and other plant leaves to line their nests.