Can Bordeaux liquid be sprayed with vegetables, Bordeaux liquid is a type of pesticide, how to use B

Bordeaux liquid. It is a protective broad-spectrum inorganic fungicide, which is commonly used in vegetable production.

Pay attention to the preparation method: the quality of copper sulfate and lime should be good, copper sulfate should choose blue crystals, lime should choose white blocks. When formulating, copper sulfate is dissolved in 80% water and quicklime is dissolved in 20% water.

Then slowly pour the copper sulphate liquid into the lime water.

Stir while pouring in the middle, and do not put lime milk.

Pour into the copper sulfate solution, otherwise the colloidal particles of Bordeaux liquid will become coarse and easy to precipitate. Bordeaux liquid should be prepared and used immediately, and if it is left for too long, it will deteriorate and lose its use value.

Pay attention to the type of vegetables and the concentration used: the concentration of Bordeaux liquid used in vegetables is generally 1:1

200 (i.e. 1 part copper sulfate, 1 part quicklime, 200 parts water). Different vegetable species have different sensitivities to Bordeaux liquid, so the concentration should be different. Melons are sensitive to lime and are suitable for lime half-dose concentrations (i.e., 1::

200）；Chinese cabbage is sensitive to copper, so it is advisable to use lime multiples (i.e., 1:2:200); Potato has strong adaptability to Bordeaux liquid, and the concentration can be appropriately increased to 1:

1:160 to 1:1:1:

100 times the solution. Generally, the organs of vegetable seedlings are young and tender, and the resistance is poor, so the concentration should be lower, such as the ratio of 1::300 should be applied at the seedling stage of cucumbers.

Pay attention to climatic conditions: although Bordeaux liquid is unstable, rainy and foggy weather, the dew on the leaves does not dry or it rains immediately after spraying, it will cause an increase in the soluble copper content on the leaves, such as exceeding the tolerance level of vegetables, resulting in burns or scorching of the leaves. Therefore, a sunny day should be chosen.

Apply the pesticide when there is no dew on the leaves. In addition, it should also be avoided at noon on sunny days when the temperature exceeds 30 or more.

Pay attention to the time of application: Bordeaux liquid is a plant protection agent, so it is better to spray vegetables before or at the beginning of the disease. Bordeaux liquid is prone to precipitation, and must be stirred continuously during the spraying process to avoid concentration changes and cause pesticide damage.

The spraying should be even, and the amount of medicine sprayed on the leaf surface of vegetables should not be too much, so that there is no excess liquid flowing down from the foliage.

Pay attention to the reasonable mixing with other agents: Bordeaux liquid is alkaline, and cannot be combined with pesticides and stone sulfur that are not alkaline.

Mix pine resin. In addition, it should also be noted that the interval between the use of Bordeaux liquid and alkali-resistant drugs, such as spraying Bordeaux liquid on vegetables should not be sprayed with pine resin mixture within 15 to 20 days, 20 to 30 days should not be sprayed with stone sulfur mixture, and 7 10 days should not be sprayed with zepin Dycozeb. Used sprayers should be cleaned immediately to prevent corrosion.

*Bordeaux liquid can be sprayed with vegetables**, but improper use may cause pesticide damage. The main manifestations of pesticide damage are leaf and fruit wilt, fruit deformity, leaf roughness, thickening, and flowering is easy to cause flower drop when applied at the flowering stage. At the same time, different vegetables have different sensitivities to copper and quicklime, so it is necessary to select the appropriate proportion of Bordeaux liquid according to the safety requirements of vegetables to prevent pesticide damage.

For example, tomatoes, melons and vegetables, sweet (spicy) peppers, etc. are susceptible to lime damage, and half or equivalent Bordeaux liquid should be used; Cabbage, beans, lettuce, etc. are susceptible to copper damage, and doubled Bordeaux liquid should be used. In addition, it is necessary to choose sunny days to spray, rainy and foggy weather and crop flowering period are prone to pesticide damage, should not be used. It cannot be mixed with the agent decomposed by alkali, and the lime liquid cannot be poured into copper sulfate.

At the same time, high-quality quicklime and copper sulfate should be selected as raw materials, which are ready for use.

Bordeaux liquid. It is a highly effective pesticide, many farmers like to use it, but there are still some people who don't know how to use it, today we will introduce it. <>

1. It is necessary to master the commonly used ratio. Since different fruit trees have different sensitivities, the corresponding liquid concentration must be formulated. Good quality Bordeaux liquid is blue. The bactericidal mechanism is mainly Bobard copper sulfate.

copper ions to affect the activity of certain enzymes that have them, thus playing a bactericidal role.

2. Distinguish the concentration of drugs according to the different growth stages of fruit trees. In general, fruit tree plants are young, less resistant, and concentrations are preferably low. Such as prevention and ** grape chickenpox.

In the early stage of disease, Bordeaux liquid can be diluted 240 times to achieve the purpose of disease resistance. In the later stage, it is more necessary to increase the dilution, it is recommended to use 600 800 times the dilution of Bordeaux solution to spray, and do not reduce the dilution without authorization. Otherwise, it may cause serious pesticide residues in the later stage, so that the acceptance will not pass and seriously affect the income of farmers.

3. Understand the effects of different climatic conditions on medications. In general, during the rainy season, Bordeaux is unstable, do not spray in rain and fog, it will lead to an increase in the soluble copper content on the leaves of plants, leading to burns of the leaves.

So a sunny day should be chosen.

Spray when there is no dew. This is very important, please don't take it lightly. Once this law is broken, it will lead to crop leaf burns, which will cause a significant reduction in crop yields, or even no harvest. This will be a major disservice to the farmer friends!

5.Do not combine with other pesticides. The final spraying period of Bordeaux liquid is generally 10-15 days, and it is not appropriate to spray other chemicals 20-30 days after spraying. Because Bordeaux liquid reacts chemically with other drugs.

Affects the growth of crops. <>

I believe that through the above introduction, farmers have mastered the use of Bordeaux liquid, hurry up and apply it to practice!

When using this drug, you can strictly follow the instructions of the drug. Because when you buy this drug, you generally have a drug instructions, and you will generally not have problems if you use it according to its instructions.

The proportion of preparation is selected according to the tree species. Bordeaux liquor is made of copper sulphate, quicklime and water. Some fruit trees are particularly sensitive to copper sulphate or lime and are prone to pesticide damage.

First, the pesticide is diluted 5,000 times with water, and then loaded into a sprayer and ready to use.

1. Hello, chives are easy to cook vegetables, and they can be eaten raw, so they can not be scalded with boiling water, and a little alkaline noodles can be added to the water.

i.e. edible alkali. Usually add 5 10 grams to 500 ml of water), soak the fruits and vegetables for about 10 minutes, and then rinse 3 5 times with water, so that you can remove the remaining Bordeaux liquid.

Cleaned up.

Second, many people go to the vegetable market.

When you go grocery shopping, you will always worry about whether there are pesticide residues in the vegetables and fruits you buy. In fact, there are two forms of drug residues in vegetables and fruits: one is attached to the surface of vegetables and fruits; The other is that during the growth of vegetables and fruits, pesticides directly enter their roots, stems and leaves.

Of the two forms, the first is more common and relatively easy to deal with. The specific cleaning methods are:

First, rinse a few times before soaking in water. Rinsing with water is the cornerstone of removing residual drugs and other contaminants. Many people buy fruits and vegetables and go home and simply fill a basin of water to soak in.

As everyone knows, if the drug residue in vegetables and fruits is serious, then the medicine may further penetrate into the vegetables and fruits after dissolving in water. Therefore, to be on the safe side, you can change the procedure of soaking in water to rinse twice. The second is to wash the vegetables first, and then choose the vegetables.

Choosing a good dish and then washing it is an established procedure for most people. But in order to clean the fruits and vegetables, you might as well reverse the two procedures. Choose greens, beans, melons, etc., cut them and then rinse and soak.

The third is to scald with boiling water. This is what most people recommend. For such fruits and vegetables with some residual drugs, you can choose to blanch them quickly with boiling water, then quickly remove them, rinse them with clean water and then eat them directly or cook them.

Under normal circumstances, it is impossible to know whether there are drug residues in the fruits and vegetables you buy, and what kind of drugs are left. Therefore, the most "old-fashioned" water rinsing and soaking method is the most widely applicable.

Experiments have proved that soaking in light salt water for about 20 minutes and then rinsing with water can reduce the pesticide residues in vegetables by more than 80%.

Bordeaux liquid is a commonly used fungicide, which can prevent and control a variety of fungal and bacterial diseases, and has a good effect on the frank and preventive treatment of fruit trees, vegetables and other plant diseases. Usually, it is necessary to wait for a while after spraying Bordeaux liquid before watering to avoid dilution or washing away the effect. It is generally recommended to wait about 24 hours after spraying Bordeaux liquid before watering to ensure that the effect is fully utilized.

If the fruit is watered immediately after spraying the Bordeaux solution, the fungicide may be diluted or washed away, affecting the efficacy of the drug. In addition, it is also necessary to pay attention to the concentration and use of the liquid medicine to avoid adverse effects on the crop. In short, when using Bordeaux liquid to control plants, it is necessary to operate in accordance with the methods and precautions for the use of slag in the instructions, and use the agent reasonably to achieve the effect of disease prevention and control.

Kiss, no hail cover is recommended. Bordeaux liquid is a commonly used pesticide that is commonly used to control plant pests and diseases. It is a mixture of copper sulfate and lime.

When using Bordeaux liquid, it is often necessary to dilute it with water for better spraying on the surface of the plant. If you have already used a sliding Bordeaux liquid and have sprayed it on the surface of the plant, it is recommended that you do not water it again. Bordeaux liquor contains copper sulphate and lime, which, if irrigated with water, can cause a chemical reaction that causes the active ingredients of Bordeaux liquor to decompose, thus affecting its effectiveness in controlling pests and diseases.

Therefore, if you have already used Bordeaux liquid, it is recommended that you wait for a period of time for the Bordeaux liquid to dry or be blown dry before watering.

<> "Hello Friends! After spraying Bordeaux liquid, it is important to properly control the timing and amount of watering to ensure that the desired control effect is achieved. Bordeaux liquid (also known as Bordeaux mixture) is a commonly used pesticide used to control diseases of fruit trees, grapes and vegetable crops.

It is recommended to wait for at least 24 hours before watering after spraying with Bordeaux liquid to avoid diluting the liquid and affecting the efficacy. 2.After spraying Bordeaux liquid, the frequency and amount of watering can be appropriately reduced to ensure that the chemical solution effectively adheres to the surface of the crop.

3.Avoid using Bordeaux liquid on rainy days, as rain may wash away the solution and reduce its effectiveness. If it rains suddenly after spraying the canopy with Bordeaux liquid, it is recommended to re-spray it after the rain has stopped.

4.When spraying Bordeaux liquid, pay attention to the coverage area of spraying to ensure that the surface of the crop is evenly covered with the solution. This reduces the likelihood of liquid loss after sprinkling.

The vegetables sprayed with Bordeaux liquid cannot be eaten for the time being, and it takes about 7-15 days for the medicinal properties to disappear, and you can eat them after the time has passed.

Bordeaux slurry is generally used to control grape anthracnose, white rot, black pox, downy mildew, etc. during the hard core period of fruit heading (late July to early August). Before use, 80% mancozeb should be sprayed once, and 10-15 days after spraying, spray once with half amount of Bordeaux solution.

The spraying must be uniform and meticulous, and the fruit and cob must be sprayed. After coloring, pollution-free pesticides should be used, and Bordeaux liquid should not be sprayed again. After fruit picking, the lime equivalent Bordeaux liquid (1:1:200) can be used for control.

Bordeaux sap is the most common protective fungicide on date trees. Spray on the leaves and fruits to form a thin film of medicine, which can be protected from germs. The leaf color often turns dark green after spraying. In general, the residual period is 15-20 days.

1) Rapeseed disease.

Use O 5 equivalent or double Bordeaux liquid. For rape downy mildew and white rust, generally at the beginning of the flowering stage of rapeseed, spray o 5 equivalent or double Bordeaux liquid 50 75 kg per mu, generally spray 2 times, and the interval between each rapid pulse is 7 10 days.

To prevent and control rape black spot and white spot disease, after the onset of mu Xiangxiang in the early flowering stage of rapeseed, spray o 5 equivalent Bordeaux liquid 50 75 kg per mu, generally spray 2 times, with an interval of 7 10 days each time.

To prevent and control rape anthracnose, in the early stage of the disease, spray 50 75 kg of Bordeaux liquid with an interval of 7 10 days, a total of 2 sprays.

2) Soybean disease control soybean rust, start spraying when the lower leaves of rape flowering stage begin to have rusty spots. 50 kg of Bordeaux liquid of the same amount per mu is sprayed 2 times, with an interval of 7 days.

To prevent and control soybean purple spot disease, spray o 5 times Bordeaux liquid at the budding stage, podding stage and tender pod stage, 1 time each, and 50 kg of liquid per mu.

3) flower disease prevention and control of peanut leaf spot, in the early stage of the disease, the rate of diseased leaves 10 15 began to spray, mu spray o 5 1 equivalent Bordeaux liquid 60 75 kg, generally spray 2 times, each time between 7 lo days.

To prevent and control peanut rust and blight, in the early stage of the disease, start spraying 75 kg of Bordeaux liquid twice per mu with an interval of 7 10 days.

4) Sesame disease with O 5 equivalent Bordeaux liquid can prevent and control sesame blight, bacterial horn spot, black spot, horn spot, etc., each mu spray 40 60 kg, generally spray 2 times, each time between 7 10 days.

5) To prevent and control castor wilt and blight, at the beginning of the disease, spray 75 100 kg of Bordeaux liquid of the same amount per mu of O 5, once every 10 15 days, and spray 2 3 times. (Qianyun).