What chemicals and methods are generally used for soil disinfection?

Pentachloronitrobenzene.

Pentachloronitrobenzene is a protective biocide. There is no inner f suction for the river. To be used for soil treatment and seed disinfection. It has a good control effect on diseases caused by Rhizoctonia spp.

Soil disinfection (also known as soil fumigation) is an emerging and efficient pest, disease and weed control technology in recent years, which has been widely used abroad. In the soil planted for many years, it is easy to breed a large number of harmful bacteria, fungi, viruses, as well as root-knot nematodes, underground pests, weeds, etc., which is difficult to control.

Soil disinfection can effectively kill a variety of pests in the soil, solve the control problems of heavy stubble and soil-borne diseases, nematodes, etc., and significantly improve the yield and quality of crops, which is an effective measure to ensure the quality and safety of agricultural products.

One of the common methods of disinfection of soil is to disinfect with chemicals.

Pesticides are applied to the soil before and after sowing with the aim of preventing the spread of seed carryover and soil-borne diseases. The main application methods are as follows.

1) Spraying or watering method. The agent is diluted to a certain concentration with water, sprayed on the surface of the soil with a sprayer, or directly poured into the soil, so that the liquid can penetrate into the deep soil and kill the germs in the soil. Spray application treatment soil is suitable for field, seedling nutrient soil, lawn renewal, etc.

The irrigation method is suitable for the irrigation of fruit trees, melons, eggplant crops and the disinfection of various crop seedbeds.

2) Poison soil method. The agent is first formulated into poison soil and then administered. The preparation method of toxic soil is to mix pesticides (emulsifiable concentrate, wettable powder) with fine soil with a certain humidity in proportion. The application methods of poisonous soil include furrow application, hole application and sprinkling application.

3) Fumigation. Use a soil syringe or soil disinfection machine to inject fumigant into the soil, and cover the soil surface with a film or other covering. In a closed or semi-closed facility, the toxic gases of the fumigant are diffused in the soil to kill germs.

After soil fumigation, sowing can only be done after the agent is fully dissipated, otherwise, it is easy to produce pesticide damage. Commonly used soil fumigation disinfectants are methyl bromide, formaldehyde, etc. This method has been applied in the planting of strawberries, watermelons, and vegetables in facility agriculture, as well as the seedbeds of seedlings and the planting of green lawns.

What to do if the soil is sick? How to do floor disinfection? A little trick to tell you.

How to disinfect the soil when planting green plants? Teach you several methods.

Soil disinfection: a technology that efficiently and quickly kills germs and pests in the soil.

Different ways of soil disinfection are carried out according to different planting needs, and the soil disinfection of ginseng planted in the wild is relatively simple, but as you said, planting ginseng on the windowsill is definitely not possible.

What are the chemicals commonly used in soil disinfection treatment? Answer: (1) Insecticides are:

5% chlorpyrifos granules 2000g 667m2; avermectin granules 2000g 667m2; 3% phosphine granules 3000g 667m2; (2) Fungicides are: 50% multibacterial silver spirit wettable powder 2000 grams 667m2; 80% Fumei double 2000g 667m2; 80% aluminum triethylphosphonate 1500g 667m2; 70% sodium dichlorina 2000g 667m2; 50% chlorobromoisocyanurate wettable powder 500 g 667m2.

1. Scorching sun exposure.

The easiest way is to use a piece of black plastic film, spread the soil on it, spread the soil evenly, expose it to the scorching sun, and often turn the soil, you can kill the germs and insect eggs and insects in the soil, generally 2 3 days of continuous exposure, you can complete the sterilization and insecticide of the soil.

The use of black plastic film when exposed to the sun is mainly to increase the ability to absorb heat, which can produce a higher temperature, so as to better kill germs and insect eggs; Turning the soil frequently can clear out all kinds of hidden weeds, and also allow the soil to be evenly heated.

2. Disinfection of boiling water.

After the water is boiled, the temperature can reach more than 90 degrees to 100 degrees, the boiling water is poured directly into the soil, the old soil can be packed in a container first, and then poured boiling water, be sure to water evenly, the waste water over the soil surface, and after the soil is dried to room temperature, it can be spread out for use.

3. Use of quicklime and plant ash.

Quicklime can be used to disinfect and improve soil, increase nitrogen content in soil, and neutralize acidity in soil. In the soil, a little quicklime can be mixed appropriately to achieve the effect of sterilization and disinfection. Of course, the dosage must be less than more, after using quicklime, the soil needs to be left for a week or two before use.

Grass ash can also achieve the effect of sterilization and disinfection, but now it is rare to collect plant ash in the city, this method is more suitable for friends in rural areas, plant ash can also be bought online, but it is certainly not so cost-effective.

4. Soil fungicide.

Sprinkle some fungicides in the soil to achieve the effect of sterilization, such as the commonly used carbendazim. If you want to remove the germs in the soil, you can also use the dichloride, which can prevent the growth of germs and has a good effect on preventing root rot.

Of course, there are a variety of different fungicides on the market, in addition to fungicides, it is necessary to add some beneficial microbial agents to the soil to improve the soil.

5. Soil pesticides.

If you want to remove eggs and insects in the soil, you also need to use soil insecticides, which can be used more insecticides, such as imidacloprid, dinotefuran and cyfluthrin, etc., which are generally managed for half a year at a time. It can remove common ants, needleworms, red spiders, small black flies, scale insects, aphids and maggots in the soil.

After these agents are sterilized and insecticidal, they can be mixed with some fertile soil, and the amount of old soil should not exceed 30% of the potting soil. In the soil, you can mix some compost soil and well-rotted manure. If you are planting potted plants, it is recommended to use well-rotted sheep manure and cow manure, the fertility will be milder and not easy to burn the plant.

Diluted ferrous sulfate or potassium permanganate is poured into the soil and covered with a film. 3. Heating: Wrap the soil in a bag and put it in a pot to steam.

4. Prepare soil: mix gravel, decomposed organic fertilizer and soil evenly. How to sterilize and disinfect the soil 1, when the soil is disinfected by sunlight exposure, the soil can be directly placed on the floor or wooden board, and then moved to an environment with direct light, exposed to the sun for 2-3 days, turning the soil every 3-4 hours, and the eggs and bacteria can be eliminated after exposure.

2. If you want to completely disinfect the bacteria in the soil, you can spray potassium permanganate, ferrous sulfate, tobuzin, etc., dilute the agent with water and water it into the soil, then cover it with plastic film, lift it after 2 days, and dry the soil for 1 week. 3. If there is a continuous rainy day in the heat treatment, the soil can be wrapped in a plastic bag, and then placed in a pot to heat, after the temperature in the soil rises, it can destroy bacteria, or directly water boiling water in the soil. 4. After the preparation of soil disinfection, it can be mixed with fine gravel, humus and sediment soil to increase the air permeability of the soil, and add well-rotted manure to the soil to provide nutrients to the root system of the plant.

Many friends will encounter such a problem when raising flowers: whether the soil should be disinfected and reused. Some friends may find it troublesome to dig up the soil and use it, but in fact, this practice is incorrect.

Because undisinfected soil may harbor many germs or insect eggs, this is why many plant diseases appear out of nowhere.

Therefore, whether it is soil for seedbeds, potted flowers, or open-air nurseries, they should be thoroughly disinfected before planting, and family flowers are no exception. So how to disinfect flower soil? Here are a few common methods:

1. Sunlight disinfection: Sunlight disinfection is the easiest disinfection method, but the disadvantage is that the disinfection may not be thorough enough.

Method: Put the prepared culture soil on a clean concrete floor, wooden board or iron sheet, spread it thinly, and expose it to the sun for 3-15 days to kill a large number of pathogen spores, hyphae and eggs, pests and nematodes.

2. High temperature steam disinfection: This method kills most bacteria, fungi, nematodes, insects, etc., and deactivates most weed seeds. However, the procedure can be complicated.

Method: Put the nutrient soil into a steamer or pressure cooker and steam it to 60-100 for 30-60 minutes (the heating time should not be too long, so as not to kill the beneficial microorganisms that can decompose the fertilizer and affect the soil fertilizer efficiency).

3. Boiled and sterilizedMethod: Pour the culture soil into the pot, add water and boil for 30-60 minutes, then drain the water and dry to moderate humidity.

4. Fire disinfection: This method also uses high temperatures to kill microbial germs. It is often used in protected seedbeds or a small amount of soil for cuttings and sowing.

Method: It can be put into an iron pot or iron plate and burned with fire, and then burned for an hour after the soil particles become dry, so that the diseases and insects in the soil can be completely eliminated.

5. DisinfectantThis method is generally aimed at family pot cultivation with a small amount of soil, and different agents can be used to fumigate the soil, that is, after the soil is sifted, a layer of soil is sprayed with chemicals, and then a layer of soil is added, and then sprayed again, and finally covered with plastic film, sealed for 5-7 days, and then open for ventilation for 3-5 days to use. Commonly used agents are formaldehyde, zebze, carbendazim, sulfur powder, etc.

SummarySoil disinfection is also an important part of flower breeding, many friends are easy to ignore and eventually lead to many disasters in the later stage of flowers, so remember to disinfect the soil before planting in the future, it will save a lot of worry!