Japanese beetles are one of the most prevalent insect pests in America. Adult beetles will devour just about any green plant, and the grubs, which live in the soil, are notorious for ruining otherwise lush expanses of turf. Japanese beetle traps are not effective, as they attract just as many beetles as they catch, and chemical means of controlling them are harmful to the earth. Instead, get rid of Japanese beetles by mixing up an organic home remedy spray.
Fill a pot with a gallon of water and bring it to a boil.
Drop one-half cup of chopped jalapeno peppers and one-half cup of dried cayenne peppers into the water. Reduce the heat, cover the pot and let the peppers simmer for a half hour.
Turn off the heat and let the water and peppers cool. Strain out the peppers and pour the water into a spray bottle.
Protect your hands with gloves. If the weather is windy, protect your eyes as well, as this home remedy spray will not only hurt the Japanese beetles, but will sting you if it drifts into your eyes.
Spray the plants thoroughly from top to bottom. This will get rid of the Japanese beetles, as they hate the taste of the spicy water on the leaves, but it will not harm your plant.