How to prevent and control flower diseases? Learn to make homemade insecticides
Common chemical agents cause varying degrees of phytotoxicity to vegetables and fruits. For example, omethoate should not be used within 30 days before harvest; malathion is phytotoxic to melons and peaches; fenitrothion is phytotoxic to cruciferous plants and should not be used within 15 days before harvesting fruits and vegetables. Dichlorvos should not be used within one week before harvesting fruit trees and vegetables...
1. Washing powder solution: Take 2 grams of washing powder, add 500 grams of water and stir into a solution, add 1 drop of clear oil, and spray on the insects on the plants. It can kill aphids, scale insects, red spiders, green stinging caterpillars, white butterflies, whiteflies, etc. Flowers with tuberous roots (such as peonies and dahlias) or with bulbs (such as lilies and lycoris) as well as fleshy root systems are susceptible to nematode damage. A washing powder solution diluted 1000 times can also be poured around the plant roots.2. Soap solution: Dissolve soap and hot boiling water in a 1:50 ratio and spray. It is effective against aphids and scale insects. Alternatively, put a little washing powder or rub some soap, preferably medicated soap, into half a basin of clean water. After stirring up foam, press the branches of the potted flowers into the soapy water and rinse them, or use a soft-bristled brush dipped in soapy water to apply to the branches and leaves. After a few days, pests such as aphids, scale insects, and red spiders can be eliminated.
3. Tobacco solution: Tobacco contains nicotine, which has a strong contact-killing effect on aphids, red spiders, ants, etc., and also has fumigant and stomach-poison effects. Take 20 grams of tobacco powder or cut tobacco, add 500 grams of water and soak for 24 hours, then filter. Add 500 grams of 2% soapy water to the filtrate and spray on leaves infested with pests; the filtrate can also be sprayed directly on the potting soil and around the bottom of the pot without adding soapy water, which can kill pests in the soil.
4. Garlic solution: Treats powdery mildew and black spot on roses. Take 30 grams of garlic bulbs, mash them, add 500 grams of water, stir well and filter. Take the filtrate and apply it to the leaf surface once a day for 3-4 consecutive sprays. In severe cases, use a brush or toothbrush to apply the garlic solution directly to the affected area. Inserting crushed garlic into the potting soil can also kill earthworms, ants, and nematodes.
5. Welsh onion solution: Take 50 grams of Welsh onion and mash into a paste, add 50 grams of water, soak for 12 hours, and spray with the filtrate several times a day for 3-4 consecutive days. It can treat aphids and other soft-bodied pests as well as powdery mildew.
6. Ginger solution: Mash ginger into a paste, add water at 20 times the amount and soak for 12 hours. Spraying with the filtrate can prevent and control leaf spot, sooty mold, rot, black-brown disease, etc., and can also prevent and control aphids, red spiders, and leaf miners.
7. Rice vinegar solution: Rice vinegar is rich in organic acids and has a good inhibitory effect on pathogens. Spray a rice vinegar solution diluted 150-200 times on the leaf surface once every 7 days or so for 3-4 consecutive sprays. It can prevent and control powdery mildew, black spot, downy mildew, etc.
8. Baking soda solution: Take 5 grams of baking soda, first dissolve it with a small amount of alcohol, then add about 1000 grams of water to make a 0.5% concentration solution, and spray the plants to prevent and control powdery mildew.
9. Mosquito coil: After lighting a mosquito coil, hang it on the plant with pests, cover the plant and flower pot with a plastic bag, and after 1 hour the pests are eliminated.
10. Essential balm: Adding water at 400-500 times the amount of essential balm can kill aphids. 11. After crushing mothballs and placing them in the potting soil, underground pests can be prevented and controlled.
12. Potassium permanganate: Potassium permanganate solution can prevent and control flower powdery mildew. In the early stage of the disease, spray with a 0.1%-0.2% solution once every 7 days or so for 2-3 consecutive sprays, and the effect can reach more than 92%.
13. Sichuan pepper solution: Take 50 grams of Sichuan pepper, add about 500 grams of water, heat and boil in a pot, and simmer into 250 of medicinal liquid. When using, add water at 6-7 times the amount and spray to prevent and control whiteflies, aphids, and scale insects.
14. Citrus peel solution: Take 50 grams of citrus peel, add 500 grams of water and soak for 24 hours. After filtering, take the filtrate and spray on the leaf surface to prevent and control aphids, red spiders, and leaf miners, or pour it into the soil to prevent and control nematodes. Alternatively, take 1 part citrus seeds and add 5 parts clean water, soak for 4-5 days, then soak flower seeds in this liquid for 10 minutes, which can prevent and control many pests.
15. Bitter melon leaf solution: Take 100-200 grams of bitter melon leaves, add water and mash, add an equal amount of lime, stir evenly, and pour around the roots of plant seedlings to prevent and control cutworms.
16. Tomato leaf solution: Mash 50 grams of fresh tomato leaves, add 150 grams of water and soak for 6 hours. After filtering, spray with the filtrate to prevent and control aphids, red spiders, etc., and it can also drive away flies.
17. Chili solution: Take 50 grams of chili, add 10 times the water, boil for 20 minutes and filter. Spraying with the filtrate can prevent and control pests such as aphids, red spiders, and stink bugs. Pouring it into the soil can prevent and control cutworms.
18. Castor leaf powder: Dry castor leaves and stalks in the sun, grind them into powder, and apply into the soil to prevent and control grubs.
19. Oleander solution: Chop 50 grams of oleander branches and leaves, add 100 grams of clean water and boil for 20-30 minutes, remove the residue and take the clear liquid to spray, preventing and controlling aphids and whiteflies, and pour it into the soil to prevent and control nematodes. However, note that oleander is highly toxic, so be careful to prevent people and livestock from eating it by mistake.
20. Beer against snails: Place a small shallow dish on the soil of potted flowers, pour beer into the shallow dish, and lure snails to crawl into the shallow dish and drown.
21. Milk against mites: Mix half a cup of whole milk with 4 cups of flour, add 20 liters of clean water and stir well, filter the liquid with gauze, and spray on branches and leaves, which can eliminate most mites and eggs.