Small experience prescription for pollution-free control of orchid diseases and insect pests

In modern times, chemical pesticides are often used to control diseases and insect pests of orchids. Orchids are vulnerable to excessive use of pesticides. Long-term single use of chemical pesticides or frequent use of chemical pesticides will lead to drug resistance of pest germs and no control effect. Spraying pesticides will also pollute the environment, and in serious cases, it will poison people and animals. Pollution-free control of orchid diseases and insect pests has existed since ancient times, and it is not uncommon in modern times. The pollution-free control of orchid diseases and insect pests has many advantages, such as effective, low cost, easy to obtain materials, simple method, no pollution, no side effects and so on. Here are some folk prescriptions for pollution-free prevention and control of orchid diseases and insect pests. "small" prescription, often may be able to solve the "big" problem, orchid friends might as well give it a try. First, tea bran, also known as tea withered, tea seed cake, is the residue left after tea seed oil extraction, which is often used by farmers to wash clothes. Tea bran contains saponins and glycosides, and its aqueous extract is alkaline, which has a good stomach toxicity and contact killing effect on pests. Prevention and control methods: 1. the tea bran mashed into powder and boiling water were soaked in the proportion of 1:5 for one day and night, and the orchid basin was irrigated with it, and the place where the orchid pot was placed and other orchid pots were drenched at the same time, which had a good control effect on snails. 2. Spraying orchid plant with tea bran water has a good control effect on aphids and red spiders, up to 90%. 3. Tea bran water can also kill earthworms. Pour the pot soil with tea bran water, and after a while, the earthworms will drill out the soil surface and pick it out. Earthworms have different views on the merits and demerits of orchids. One view is that the earthworms in the basin will destroy the hyphae of some orchids and the root tips of orchid roots. They are pests and must be removed. Another view is that the earthworms in the orchid basin can eat many decaying substances in the orchid basin and the rotten roots of orchids, the activity of earthworms can play a role in loosening the soil, and their feces can also be used as fertilizer for orchids. Which is right and which is wrong, we need to weigh the pros and cons and judge them according to their own practical observation. Second, odorous vegetables (onion, garlic, leek, ginger, onion, etc.) odor vegetables have their own odor, its smell can play a role in insecticidal and sterilization. Control methods: 1. Take 25 grams of garlic, mash and squeeze the juice, dilute it in 10 liters of water, spray orchid plant immediately, and cure aphids, red spiders, shell insects and gray mold. The peeled garlic was pressed into small pieces and placed on the orchid topsoil at equal distances. Earthworms and ants disappeared after a few days. (2) the chopped green onions and water were soaked in the proportion of 1:30 for one day and then filtered, and the orchid plants were sprayed with them for several times a day for several days, which had a good effect on the control of aphids, soft pests and powdery mildew. 3. Use 1 jin of ginger, add half a jin of water, mash and take juice, add 6 jin of water per jin of juice, and spray orchid plants to control aphids. 4. The black spot disease can be cured by spraying the orchid plant with the mixture of leek juice and clear water at the ratio of 1:60, twice a day and repeatedly for several days. 5. Take 15 grams of chopped onion bulbs, put them in 2 jin of water for 7 hours, then filter, spray orchid plants with filtrate, which can cure red spiders and aphids. Third, tobacco butts contain about 3% nicotine. Nicotine has a strong contact and stomach toxic effect on pests. Take about 20 leftover cigarette butts and a portion of quicklime, stir and filter with water, and then add 30 parts of water to spray the orchid plant, basin soil and basin bottom, which can eliminate ants and other waxless pests. Detergent detergent can dissolve the cornea of the shell worm and at the same time form a layer of foam to wrap it around the worm, causing the shell worm to suffocate to death. Washing powder solution can control some diseases and insect pests. Control methods: 1. Dissolve laundry powder with a small amount of warm water, then dilute it to 1000 times with water, and spray orchid plants, which can kill aphids, whiteflies and red spiders. Diluted to 600 times, sprayed once every three days, and sprayed three more times, all the scale insects died. 2. Anthracnose and soft rot can be prevented and cured by mixing pig bitter bile and clear water at the ratio of 1 to 100 and adding a small amount of human washing powder to spray orchid plant. The orchid plant was sprayed with detergent solution, and after the pest died, the leaves must be washed with clean water several times. so that the orchid plant can grow normally. 5. the spirit will be mixed with liquor and water at the ratio of 1:2, and the orchid plant will be sprayed once a week for three more times, which can kill the scale insects. Sixth, the citrus peel put the orange peel at the bottom of the basin, which can prevent ants and other pests from entering the basin soil to harm orchids. Citrus peel can also be cut into pieces, scattered on the surface of the basin soil, not watered for a few days, can treat aphids, shell insects and so on. 7. Brown sugar will be mixed with powdered brown sugar and boiled water in the ratio of 1 to 100. After cooling, the orchid plant will be sprayed with brown sugar solution once every 3 days for three times, which has a good effect on the prevention and control of downy mildew, powdery mildew, black spot and leaf blight. 8. Diesel oil will be mixed with diesel oil and water at the proportion of 1:60 into an emulsion, and then diluted with 100x water, the orchid plant can be sprayed to cure scale insects. 9. Plant ash soaks plant ash and water at the ratio of 1:50 for two days and nights before filtering. Spraying orchid plants with filtrate can not only cure aphids, but also increase potash fertilizer. Ten. Vinegar will be mixed with vinegar and clear water at a ratio of 1:8, and the shell insects can be treated by evenly spraying the positive and back of the orchid leaves. If the scale insect has become an adult, it can slightly increase the acidity of the mixture and spray it once every three days for three more times, which can kill the scale worm of its own adult. Foliar spraying vinegar can also eliminate black spot, powdery mildew, leaf spot, chlorosis and so on. Do not use sour vinegar for industrial use.