The pests and diseases of orchids are mostly controlled by chemical pesticides in modern times. Excessive use of pesticides, orchids susceptible to injury. The long-term use of chemical pesticides or the frequent use of pesticides will make the insects resistant to bacteria and will not achieve control effects. Spraying pesticides will also pollute the environment. In severe cases, humans and animals will be poisoned. Pollution-free control of orchid pests and diseases has been around since ancient times, and it is common in modern times. Orchid pests and diseases have the advantages of effective prevention, low cost, easy material acquisition, simple method, no pollution, no side effects and so on, and are worthy of promotion. Here are some of the small prescriptions of non-pollution prevention and control of orchid diseases and pests circulating in the country. "Small" prescriptions may often be able to solve the "big" problem. Lan friends may wish to try.
I. Tea bran
Tea bran, also known as tea withered, tea seed cake, is the slag left over from tea seed oil. Farmers often wash clothes. Tea bran contains saponin and glycosides, which are alkaline in the aqueous leachate and have good stomach toxicity and contact toxicity to the pests. Control methods: 1. The crushed tea bran and boiling water are immersed in the ratio of 1:5 for a day and night. The places where the sloping blue pots are poured and the pots are placed at the same time, and the other pots are placed on the pots, and the snails have a good preventive effect. 2. The use of tea bran water to spray blue plants has a good control effect on aphids and red spiders, reaching up to 90%. 3. Tea bran water can also kill crickets. With tea bran water poured through the pots and soil, after a short moment, the earthworms will be drilled out of the soil, pick out and remove it. He has different views on the merits and demerits of orchids. One view is that the crickets in the pot will destroy some hyphae of the bacterium and damage the root tip of the orchid root. They are pests and must be removed. According to another view, the pots in the blue pots can eat up many rots and rotted roots of orchids in the blue pot. The activity of plutonium can play a role in loosening the soil, and its excrement can also be used as a fertilizer for orchids. Do not need to kill it. It is a matter of right and wrong. It is up to Lam friends to judge according to their own practice and weigh the pros and cons.
Second, odor vegetables (green onions, garlic, leeks, ginger, onions, etc.)
Odorous vegetables have their own odor, and their odor can play a role in insecticidal sterilization. Control methods: 1. Take 25 grams of garlic, mash and squeeze the juice, dilute in 10 liters of water, immediately spray blue plants, can cure aphids, spider mites, scale insects and gray mold. The peeled garlic was pressed into small pieces and placed at equal distances in the top soil of the blue pot. After a few days, the ants disappeared. 2 The chopped green onions and water are soaked in the ratio of 1:30 for a day and night, filtered, sprayed with the blue strain, sprayed several times a day, continuously sprayed for several days, and are good for controlling aphids, soft pests, and controlling powdery mildew. Effect. 3. 1 kg of ginger, half a catty of water, smashed juice, 6 pounds of juice per kilogram of water, spray blue plants, can control aphids. 4. Mix amaranth juice and fresh water at a ratio of 1:60. Spray the blue strain with it and spray it twice a day. Repeat spraying for several days to cure melasma. 5. Take 15 grams of chopped onion bulbs, put it in 2 jins water and soak for 7 hours. After filtering, spray the blue strain with the filtrate to cure red spider and aphid.
Third, cigarette butts
Tobacco contains about 3% of nicotine. Nicotine has a strong contact and stomach poisoning effect on pests. Take 20 remaining cigarette butts and a quick lime, add water, stir and dip and filter, then add 30 parts of water, use it to spray blue plants, pots and pots and pelvic floor to eliminate ants and other non-waxy insects.
Fourth, washing powder
Washing powder can dissolve the cornea of ​​the scale insect, and at the same time form a layer of foam wrapped around the body of the insect, causing the scale insect to suffocate and die. Washing powder solution can prevent some pests and diseases. Control methods: 1. With a small amount of warm water-soluble detergent, and then diluted with water to 1000 times, spraying orchid strains can kill aphids, whiteflies, and spider mites. Diluted to 600 times liquid, sprayed once in three days, and continued spraying three times, all scale insects died. 2. The bitter bile and fresh water of pigs are mixed in a ratio of 1:100, and a small amount of detergent is added to spray the blue strain, which can prevent anthrax and soft rot. The orchid strain is sprayed with the detergent solution, and after the insects die, the leaves must be rinsed with water several times. In order to make the blue plant normal growth.
Fifth, liquor
Mix white spirit and water in a ratio of 1:2, spray blue plants, spray once a week, and continue spraying three times to kill scale insects.
Six, orange peel
Placing the citrus peel on the pelvic floor will prevent ants and other pests from entering the basin soil and harming the orchids. Citrus peel can also be cut into pieces, sprinkled on the surface of potted soil, do not water for a few days, can treat aphids, scale insects and so on.
Seven, brown sugar
Mix powdered brown sugar and boiled water in a ratio of 1:100. After cooling, spray the blue strain with the brown sugar solution. Spray once every three days for three consecutive times. It is more suitable for controlling downy mildew, powdery mildew, black spot, and leaf blight. Good results.
Eight, diesel
The emulsion of diesel and water was adjusted to a ratio of 1:60, diluted with 100 times water, and then sprayed with a blue strain to treat scale insects.
Nine, grass ash
The plant ash and water are soaked in the ratio of 1:50 for two days and nights, filtered, and the filtrate is sprayed with the blue strain, which can treat aphids and increase potash fertilizer.
X. Vinegar
Mix vinegar and fresh water in a ratio of 1:8 and use it to uniformly spray the back and the back of the blue leaf to treat scale insects. If the scale insect has become an adult, slightly increase the acidity of the mixture, spray once in three days, continue three times, you can kill the adult scale insect. Foliar spraying of vinegar can also eliminate black spot, powdery mildew, leaf spot, and yellowing disease. Industrial use vinegar was hanged.
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