No need to buy pesticides for flowers - you can make them at home
1 Pest control
1.1 Chinese pulsatilla: Wash the plant, chop it up, and mash it. Add water at a weight ratio of 1:10 and soak for 23 hours, or boil for half an hour. The filtrate can control aphids, leafhoppers, and lace bugs.
1.2 Japanese bindweed: Wash the stems, chop them up, and mash them. Add water at a weight ratio of 1:5 and soak for 24 hours. The filtrate can control aphids, leafhoppers, and lace bugs.
1.3 Sun spurge: Chop and mash the stems and leaves. Add water at a weight ratio of 1:4 and boil for 1-2 hours. The filtrate can be sprayed to control aphids and red spider mites.
1.4 Soapberry: Add water to the fruit peels at a weight ratio of 1:5 and soak for 24 hours. Take the filtrate, add 20% vegetable oil, and stir vigorously to make a stock solution. When using, dilute the stock solution with water at a volume ratio of 1:20-30 and spray. It can control beetles, aphids, and other soft-bodied animals.
1.5 Mint: Chop and mash the mint. Add water at a weight ratio of 1:5 and soak for 24 hours. The filtrate can control leafhoppers and lace bugs.
1.6 Asiatic plantain: Wash and mash the Asiatic plantain. Add water at a weight ratio of 1:5 and soak for 24 hours. The filtrate can control aphids, leafhoppers, lace bugs, and red spider mites.
1.7 Sichuan pepper: Add water to Sichuan pepper at a weight ratio of 1:10 and boil down to 5 parts stock solution. Then dilute with water at a volume ratio of 1:10 and spray. It can control whiteflies and aphids.
2 Disease control
2.1 Rose of Sharon: Take rose of Sharon flowers, add water at a weight ratio of 1:10, and soak for 24 hours. The filtrate can control root rot and damping-off disease.
2.2 Ginger: Mash ginger and squeeze out the juice. Then dilute the juice with water at a volume ratio of 1:20 and spray. It can control soft rot disease.
2.3 Sweet wormwood: Take sweet wormwood, add water at a weight ratio of 1:25, and boil down to 20 parts liquid. It can control damping-off disease.
3 Others
3.1 Baking soda: Baking soda (sodium bicarbonate) has the effect of inhibiting fungal growth. Spraying with a 0.10%-0.20% baking soda solution can control powdery mildew.
3.2 Plant ash: Take plant ash, add water at a weight ratio of 3:10, and soak for 49 hours. After settling, spray the clear liquid on plants. It can control aphids and gray mold, etc.
3.3 Mosquito coil: Light a mosquito coil containing pyrethrin and place it in the flowerpot, then seal the pot with a plastic cover. Fumigate for 50-60 minutes to kill red spider mites.
3.4 Essential balm: Spray with essential balm diluted 600-800 times. It can control aphids, beetles, red spider mites, etc.
3.5 Laundry detergent: Add water to laundry detergent at a weight ratio of 1:150, stir well, and spray once every 5 days for 2-3 consecutive sprays. It can control aphids, red spider mites, beetles, whiteflies, etc.
3.6 Potassium permanganate: Use a 0.20%-0.03% potassium permanganate aqueous solution and spray once every 2-3 days. For severe cases, spray twice. It can control powdery mildew.