The beetles can’t resist their leaves and it kills them. Hand-pick the beetles and drown them if there are only a few. Use Milky Spore During the larvae stage, the Japanese beetle is very susceptible to a disease called milky spore disease. To get rid of the larvae, you can introduce this fungal disease into your lawn to help kill them off. Neem oil: This oil comes from trees and is non-toxic. How to Get Rid of Japanese Beetles 1. Create … Remove beetles by hand. Plant 4 o’clock flowers. Hand-picking the beetles off of your … The flowers open up at 4 PM – 5 PM... 3. The larvae will ingest the spores as they feed in the soil and get mortally sick. If you notice them early enough, you may be able to pick them off your leaves and out of the... 2. You can spray it on roses and other plants that …