How to control orchid pests with pollution-free methods?

1. Washing powder and detergent: washing powder can dissolve the cornea of the shell worm and form a layer of foam to wrap it around the insect body, causing the worm to suffocate to death. Washing powder solution can control some diseases and insect pests. Control method: dissolve laundry powder with a small amount of warm water, then dilute it to 1000 times with water, and spray orchid plant to kill aphids, whitefly and red spider. When diluted to 600 times, sprayed once every three days and sprayed for three more times, all the shell insects died; the pig bitter bile and clear water were mixed at the ratio of 1 to 100, and a small amount of washing powder was added to spray the orchid plant to control anthracnose and soft rot. 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.

2. Liquor: mix liquor and water at 1:2, spray orchid plant, spray once a week, and spray three more times, which can kill shell insects.

3. Citrus peel: put the citrus peel at the bottom of the basin to 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.

4. Plant ash: plant ash and water are soaked in the proportion of 1:50 for two days and then filtered. Spraying orchid plants with filtrate can not only cure aphids, but also increase potash fertilizer.

5. Vinegar: mix vinegar and water at the ratio of 1:8, and spray orchid leaves evenly on the front and back of orchid leaves to treat scale insects. 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.

6. Tea bran: tea bran contains saponins and glycosides, and its water extract is alkaline, which has a good stomach toxicity and contact effect on pests. Prevention and control methods: the powdered tea bran and boiling water are soaked in 1:5 for one day and one night, and the orchid pots and other orchid pots are poured with them, which has a good control effect on snails; spraying orchid plants with tea bran water has a good control effect on aphids and red spiders, up to 90%; 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.

7. Odorous vegetables (green onion, garlic, leek, ginger, onion, etc.): odorous vegetables have their own peculiar smell, and their smell can play a role in insecticidal and sterilization. Control method: take 25 grams of garlic, mash and squeeze juice, dilute in 10 liters of water, spray orchid plant immediately, can cure aphids, red spiders, shell insects and gray mold. The peeled garlic was pressed into small pieces and placed equidistant in the orchid basin topsoil, and after a few days, the earthworms and ants disappeared; 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 consecutive days. it has a good effect on the control of aphids, soft pests and powdery mildew. Use ginger 1 jin, add water half jin, mash juice, add water 6 jin per jin, spray orchid plant, can control aphids; mix leek juice and clear water according to 1:60, spray orchid plant with it, spray orchid plant twice a day, spray repeatedly for several days, cure black spot disease; take 15 grams of chopped onion bulbs, put them into 2 jin of water for 7 hours, then filter, spray orchid plants with filtrate, and cure red spiders and aphids.

8. Cigarette butts: tobacco leaves 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.

9. Mix powdery brown sugar and boiled water at the ratio of 1 to 100, spray the orchid plant with brown sugar solution after cooling, spray once every 3 days, continue for three times, it has a good effect on the control of downy mildew, powdery mildew, black spot and leaf blight.

10. Diesel oil: diesel oil and water are mixed into emulsions at the ratio of 1:60, and then diluted with 100x water, orchid plants are sprayed to cure scale insects.