Our Facebook Page is a great way to discuss gardening tips with a community of individuals who love roses! One of the most common questions we receive is “How can I deter Japanese Beetles from eating my roses?” – next to blackspot, this seems to be one of the most common problems in the rose world. Japanese beetles are notorious for ravaging roses and other crops, leading to an unsightly floral display.
Japanese beetles are pesky little things. They can be identified by their metallic green body and copper wings. Their life span lasts about a month or two, but don’t be fooled – they can do some serious damage in that short time! They eat a wide variety of plants – most commonly roses, beans, grapes, and raspberries.
Good gardening habits, such as watering and fertilizing will reduce the damage that Japanese beetles can make. However, this is not a guaranteed practice and other prevention may need to be taken.
Unfortunately, the most effective way to remove the Japanese beetle from your roses is to remove them by hand. It takes some time, but it works. Wear gloves when you remove them and place them in a solution of 1 tablespoon dish soap mixed with water, which will cause them to drown.
Sprays containing neem oil and potassium bicarbonate have also proven very effective to remove and prevent Japanese beetles from attacking your roses. Our Rose Rx 3-in-1 Concentrate contains both of these elements and can also help to deter powdery mildew and aphids. However, it is important to note that insecticides will not fully protect roses from every pest.
Deadheading is the most effective way to end a Japanese beetle infestation when the attack has gotten hard to manage. Nip the buds and blooms off with pruners and drop them into the aforementioned soap solution. You can also try planting geraniums, garlic, or tansy next to or near your roses as they have been shown to deter the beetles.