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Recently, people have become accustomed to fighting pests with the help of various chemical preparations. But you can do without chemistry. There are effective folk methods of combating beetles. It is worth trying. You can always go back to chemicals, but you have to take care of your health.
Colorado beetles are very afraid of the smell of juniper. To make a solution to sprinkle on potatoes or eggplants, take a nice bunch of juniper shoots and pour 10 liters of water. It is necessary to insist for 4 hours, and then sprinkle. But don't do it before it rains.
Purulent repels beetles and kills larvae. Pour 10 liters of water over fresh celandine shoots, boil for 15-20 minutes, strain. Then dilute 500 ml of infusion in a bucket of water and process the plants. It is also recommended to lay out fresh celandine shoots between the rows of eggplants, tomatoes and potatoes.
Also afraid of the Colorado wormwood beetle. Take 400 g of wormwood, 10 pods of red pepper, 10 g of garlic stalks, 100 g of celandine. Pour boiling water over everything, let it brew for 12 hours and sprinkle potatoes and other crops with the infusion.