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Neem oil: This oil is safe to use because it comes from trees and is non-toxic. This can be sprayed on roses flowers or any other plants you see the beetles enjoy eating. This method is less stressful, and it goes a long way because once the adult beetles ingest the neem oil, they will pass it to the eggs and hatched larvae will die before it enters into their adult stage. In conclusion, neem oil is harmful to fish, so stay clear from this method if you have a fish ponds.
Soap solution: This method can be harmless to the environment if you apply correctly. This can help suffocate the beetles, mix a teaspoon of dish soap with a quart of water. Apply it to any plants affected by the beetles putting the solution into a spray bottle. You can add some solutions like rubbing alcohol and oil, and this depends on the plant you have in your area. However, it is crucial to do proper research on how these chemicals and oil could harm some plants and animals around.
Handpick them: this may be unpleasant for some people, but it is the most effective way of getting rid of the Japanese beetles is to handpick them. Remember they don’t bite, so it is entirely safe. This method can be tedious, but it works. When you pull them off the plants, but sure to put them into soapy water or boiled water both work perfectly well.
Row cover: You can protect your plant by from the beetles with row covers. If you don’t see beetle damage until the summer, when the beetles start to enter the adult stage and start feeding above ground, this method should help you. Use the row covers just when the beetles start feeding above the ground, which begin in mid-June and last about 6 to 8 weeks.
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