How to prepare Bordeaux liquid? Bordeaux liquid preparation method

Bordeaux liquor is a protective biocide with an active ingredient of basic copper sulfate. The preparation has the characteristics of wide bactericidal spectrum, long duration of effect, no resistance to pathogens, and low toxicity to humans and animals, and is a fungicide with the longest application history. The main components of Bordeaux liquid are copper sulfate, quicklime and water, and the selection of materials before preparation is very important, copper sulfate is best pure blue asymmetrical triclinic crystal, and there are also granular pure blue copper sulfate, but should not be entrained with green or yellow-green impurities; Quicklime is the key to determining the quality of the prepared Bordeaux liquid, to choose the burned block quicklime, in the hand light, two pieces of quicklime touch each other sound crisp, and heavy, damp, weathered into powdery quicklime can not be used.

The proportion of Bordeaux liquor commonly used in production is equal (copper sulfate: quicklime = 1 1), multiple formula (1 2), half quantity formula (1 and multiple quantity formula (1 3 5), and the water consumption is generally 160 240 times. The proportion of copper sulfate and quicklime and the amount of water added should be determined according to the sensitivity of the tree species or variety to copper sulfate and lime (less copper sulfate is used for copper sensitive, less lime is used for lime sensitive) and the different control objects, drug seasons and temperatures.

Taking the 1 1 160 equivalent formula as an example, the preparation process is as follows: in a plastic bucket or ceramic barrel, first dissolve the kilogram of copper sulfate with 5 kg of warm water, and then add 70 kg of water to prepare a dilute copper sulfate solution. At the same time, add 5 kg of water to kilograms of quicklime in a large vat or medicine pool to prepare concentrated lime milk, and finally slowly pour the dilute copper sulfate solution into the concentrated lime milk, stirring while pouring.

The Bordeaux liquid prepared in this way is sky blue, with good suspension and good control effect. Kilograms of quicklime can also be dissolved with 40 kg of water, kilograms of copper sulfate dissolved with 40 kg of water, and then lime water and copper sulfate solution are poured into the third container, stirring while pouring.

Bordeaux liquid should be used with the mixture, and should not be left for a long time, otherwise it will produce precipitation, reduce the efficacy, and produce drug damage. Bordeaux liquid can not be mixed with soap liquid, pine resin mixture, stone sulfur mixture, mineral oil emulsion, antibacterial special, etc., and should be mixed with organophosphorus pesticides should be cautious, can be mixed with use. It takes 10 days for chestnut orchards that have been sprayed with stone sulfur mixture to be sprayed with Bordeaux liquid, and 20 to 30 days for chestnut orchards that have been sprayed with Bordeaux liquid before they can be sprayed with stone sulfur mixture.

Bordeaux liquid is a wide range of applications, a long history of copper fungicide, although the preparation method is more troublesome, but because it can effectively control a variety of fruit tree diseases and good effect, long residual effect, not easy to produce resistance, is a cheap and excellent fungicide. It has a good control effect on a variety of diseases such as grape downy mildew, black pox, anthracnose and brown spot.

Bordeaux liquor with excellent texture is a sky blue colloidal suspension, which is alkaline, relatively stable and has good adhesion, but it will precipitate for too long, produce crystallization and reduce the efficacy, so it must be prepared and used now, and cannot be stored.

The preparation method and usage method are as follows:

The Bordeaux liquid used to control grape diseases is generally 200 times the lime half amount, that is, 1 (copper sulfate, lime), 200 (water). It can also be formulated in a ratio of 1.

First, take 80 liters of lime to water, stir to fully dissolve and then filter, and prepare lime milk for later use. Then take 1 kg of copper sulfate to 20 liters of water, fully dissolve copper sulfate, (note that the large crystals should be crushed before dissolving) gauze filter for later use. The copper sulfate solution is slowly poured into the lime emulsion, so that the reaction is carried out under alkaline medium, and stirred constantly, and it can be used after a moment of rest.

A well-prepared agent contains very fine and uniform particles, slower precipitation, and less clear water layer; The poorly prepared Bordeaux liquid precipitates quickly and has more clear water layers.

Bordeaux liquid is a blue emulsion, which is an important fungicide for the prevention and control of flower and fruit tree diseases. It should be used with the mixture, no longer diluted, and cannot be stored. Because it has a corrosive effect on metal, the sprayer should be washed after each use.

Bordeaux liquid cannot be mixed with stone sulfur mixture and petroleum emulsion. When preparing, 1 part of copper sulfate is dissolved in 90 parts of water, 1 part of lumpy burnt quicklime is dissolved in 10 parts of water, and the diluted copper sulfate solution is slowly poured into the thick lime milk, and stirred while pouring. Do not pour concentrated lime into dilute copper sulfate solution to prepare.

It can only be prepared with wood, porcelain or tile pots, and cannot be prepared with metal basins or barrels to prevent corrosion.

The commonly used proportion of Bordeaux liquor in production is: Bordeaux liquid lime equivalence (copper sulfate: quicklime = 1:

, the water consumption is generally 160-240 times.

Self-preparation: The proportion of copper sulfate and quicklime and the amount of water added should be determined according to the sensitivity of the tree species or variety to copper sulfate and lime (less copper sulfate for copper and less lime for lime sensitivity) and the different control objects, medication seasons and temperatures.

Note that the selection of raw materials should be pure, high-quality, white quicklime blocks and pure blue copper sulfate. Note that copper sulphate should not be entrained with green and yellow impurities.

Master the preparation method, first take 1 3 water to prepare lime emulsion, fully dissolve and filter for later use; Then take 2 3 water to prepare copper sulfate solution, fully dissolve and set aside. Slowly pour the copper sulfate solution into the lime emulsion, stir while pouring or slowly pour the copper sulfate liquid and lime emulsion into the same container at the same time, stirring while pouring.

The lime emulsion must not be poured into the copper sulfate solution, otherwise the prepared liquid will precipitate quickly and be prone to pesticide damage. Note that the Bordeaux liquid should be used with the mixture, and the liquid medicine prepared on the same day should be used up on the same day, not for a long time, not overnight, and not diluted.

Pay attention to the drug period, after the arrival of the rainy season, it is used to prevent and control grape anthracnose and downy mildew in the hard core period of fruit heading. Before use, 80% mancozeb should be sprayed once, and 10-15 days after spraying.

Configuration Method:

The raw materials for the preparation are copper sulfate, quicklime and water, and the mixing ratio should be determined according to the sensitivity of the crop to copper sulfate and lime, the control object, and the different seasons and temperatures. The commonly used proportion of Bordeaux liquor in production is: copper sulfate lime equivalent formula (copper sulfate:

quicklime = 1:1), multiples (1:2), half-weights (1:

0 5), multi-quantity formula (1:3 5) and small amount, the water consumption is generally 160-240 times. The so-called half-volume, equal and multi-volume Bordeaux liquor refers to the ratio of lime to copper sulfate.

The preparation concentration of 1%, etc., refers to the amount of copper sulfate. For example, the application of a concentration of half-volume Bordeaux liquid, that is, with 1 part of copper sulfate, 200 parts of lime, 200 parts of water. That is, 1::

200 times Bordeaux liquid.

In the preparation process, half of the copper sulfate can be dissolved according to the water consumption, and the other half can be dissolved quicklime, and after it is completely dissolved, the two can be slowly poured into the spare container at the same time, and stirred constantly; It can also be used to dissolve quicklime in water of 10 20, dissolve copper sulfate in water of 80 90, after it is fully dissolved, the dilute copper ash method is used, the reaction is carried out in alkaline medium, the copper sulfate solution is slowly poured into the lime milk, and the two liquids are mixed evenly while pouring to obtain the sky blue Bordeaux liquid, the Bordeaux liquid prepared by this method has strong colloidal properties and is not easy to precipitate. It should be noted that lime milk must not be poured into copper sulfate solution, otherwise precipitation has occurred and the efficacy of the drug will be affected.

Larger orchards generally need to build a dispensing pool, the dispensing pool is composed of a large pool, two small pools, two small pools are located above the large pool, and the bottom is left with a water outlet to communicate with the large pool. When dispensing, plug the water outlets of two small pools, dilute copper sulfate in one small pool, dilute lime in another small pool, and fill 1 2 of the amount of water to be mixed respectively (copper sulfate and lime need to be dissolved with a small amount of water first, and the lime slag is filtered out). Then, pull out the plug hole, and the two small pools are poured into the large pool, and stir evenly.

If the amount of medicine is small, you can use a large vat, two porcelain basins or buckets. First, use two small containers to dissolve the copper sulfate and lime. Then two people each hold a container, slowly pour it into a large vat of water, and stir while pouring it, and it can be prepared.

Bordeaux liquid is a sky blue gelatinous suspension prepared by about 500 grams of copper sulfate, 500 grams of hydrated lime and 50 kilograms of water. The general laboratory preparation steps are as follows:

Mother liquor 1: 2% copper sulfate 200ml. Weigh the copper sulfate, put it in a 250ml beaker, add a small amount of water, wait for the copper sulfate crystals to be completely dissolved, and then dilute to 200ml for later use.

Mother liquor 2: 2% lime milk 200ml. Weigh the quicklime, put it in a 200ml beaker, add a small amount of water, let it stand for 15min, do not stir, make it completely emulsified into a paste, then dilute it with water, filter it with gauze, transfer it to a 250ml beaker, and set aside.

Dissolve half of the copper sulfate according to the water consumption, and the other half dissolve the quicklime, and after it is completely dissolved, slowly pour the two into the spare container, and stir constantly. It can also be used to dissolve quicklime in 10% 20% water, and dissolve copper sulfate in water of 80% 90, and after it is fully dissolved, the copper sulfate solution is slowly poured into the lime milk, and stirred while pouring to form Bordeaux liquid. Do not pour lime milk into the copper sulphate solution, as this will reduce the effect of the Bordeaux solution.

Hello, about your question It is understood that Bordeaux liquid is a copper preparation fungicide with the widest range of applications and the longest history, which is a broad-spectrum and protective fungicide, which forms a thin film on the surface of the plant after spraying, and releases copper ions at a certain humidity to destroy the protein in the cells of the germ and play a bactericidal role. When it rains or the air humidity is high, the base copper sulfate releases a large number of copper ions, which may also cause pesticide damage after being absorbed by plants. The pesticide damage is related to grape varieties and growth periods, as well as the quality and dosage of quicklime.

The more lime, the safer it is for plants, but it is slower to kill bacteria and is easy to contaminate plants. Therefore, different mixing ratios should be used for different varieties and control objects. Although the preparation method is more troublesome, it is still a cheap and excellent fungicide commonly used until now because it can effectively control a variety of diseases of fruit trees, and the control effect is good and the validity period is long.

It has a good control effect on grape black pox, downy mildew, anthracnose and brown spot and other diseases. Bordeaux liquid with excellent texture is a sky blue colloidal suspension, which is alkaline, relatively stable and has good adhesion, but it will precipitate if it is placed for too long, resulting in amorphous crystals and reducing the efficacy. Therefore, Bordeaux liquid must be prepared for use and cannot be stored.

Second, the preparation method.

1) Material: copper sulfate, quicklime, water.

2) Preparation method: 1 part of copper sulfate, 1 part of quicklime, 100 parts of water (generally abbreviated as 1 1 100), prepared into 1% lime equivalent Bordeaux liquid. There are two methods for preparing Bordeaux liquid, namely the two-liquid simultaneous pouring method and the copper sulfate pouring lime liquid method.

The two liquids are poured together: dissolve quicklime and copper sulfate with 50 kg of water respectively (such as hot water is best used in winter), filter them separately, and wait until the temperature of the two liquids is close to each other, slowly pour the two liquids into a large container at the same time, and stir continuously and strongly until it becomes a viscous sky blue solution.

Copper sulfate poured into lime liquid method: 10 kg of water is used to dissolve the lime first, and then the copper sulfate is dissolved with an appropriate amount of hot water, then filtered with a fine basket, and 90 kg of water is added to prepare a dilute copper sulfate solution slowly poured into the lime solution, and at the same time strong stirring is made.

The prepared Bordeaux liquid, it is best to use a rust-free iron knife (piece) to soak in the liquid medicine, and then take it out, if there is rust on the iron knife (piece), it can not be used, and an appropriate amount of lime should be added.

Hope it helps.

1. Bordeaux liquid is a sky blue gelatinous suspension made of about 500 grams of copper sulfate, 500 grams of hydrated lime and 50 kilograms of water. The ingredient ratio can be appropriately increased or decreased as needed.

2. Bordeaux liquid is generally alkaline and has good adhesion properties, but the long-term release of the material with the skin shape is damaged, it is advisable to mix it with it or make it into dehydrated Bordeaux powder, and then mix it with water when it is used.