But since they can fly, you can be sure that there will be more to come and visit your precious flowers. In small numbers, rose chafers can be hand-picked and dropped into a bucket of soapy water so they sink. Check frequently, as new rose chafers can fly into your garden. Step 3. Step 2. Most years, you will get about four weeks of feeding with the middle two weeks being the most severe. Or a barrier of cheese cloth or floating row cover material that is secured to the ground can exclude them for the four or so weeks they are feeding. Pick rose chafers off plants When small numbers are present, pick rose chafers from plants and drop into pails of soapy water to kill them. Place them in a bucket of soapy water to kill them once removed from the plant or bush. How to Get Rid of Rose Chafer Beetles For controlling rose chafers, gardeners can handpick the beetles and drop them into a container filled with soapy water. How to Get Rid of Rose Chafer Beetles Step 1. Survey your trees, shrubs or crops to determine the extent of potential foliage damage from rose chafer beetles. Or just shake the plant lightly, it dislodges lots of these beetles. Products that are effective are carbaryl with a brand name of Sevin and others and cyfluthrin with a brand name of Bayer Advanced Garden Multi-Insect Killer. Rose Chafer Control. Managing or eliminating this nasty garden pest by non-chemical means can be done by physically removing the rose chafers from the plants they are on. This works fairly well when there are small numbers of them. End their little orgies of food and fun immediately. They can fly, so you may want to be quick about it. You can also use a physical barrier, like a cheesecloth or floating row cover. If plants are sturdy, you can use a hand vacuum and empty the dirt cup having beetles into soapy water. How to Get Rid of Rose Chafers: The best way to get rid of them immediately to prevent further damage is to pick them off and destroy the bug itself. Pick off the odd beetle or two you find on your plants.