Matters needing attention in using Bordeaux liquid

In the use of Bordeaux liquid, to choose pure, high-quality white quicklime and pure blue copper sulfate, configured in non-metallic utensils, the configuration of the day should be used up on the same day; in the fruit ear sealing hard core period (late July to early August) for use, to ensure that the fruit, ear spray evenly, in the fruit harvest after the application of lime Bordeaux solution (1Drex 1ve200) for prevention and control.

The specific points for attention in the use of Bordeaux liquid are as follows:

Bordeaux liquid was found by the French in Bordeaux, so it has this name, it is an inorganic copper fungicide. What are the precautions when it is used as a fungicide? What are the ways to configure it? Let's learn about it with the editor.

Bordeaux liquid, as one of the fungicides, must pay attention to the following when using and configuring:

1. Configuration of Bordeaux liquid raw materials

Choose pure, high-quality white quicklime and pure blue copper sulfate and configure them in non-metallic utensils. Use up on the same day.

two。 The use time of Bordeaux liquid

Bordeaux liquid should be used after the rainy season, that is, during the hard core period of fruit sealing (from late July to early August), to ensure that the grains and ears are sprayed evenly, and to apply lime equivalent Bordeaux solution (1-1-1-15-200) after fruit harvest.

3. Bordeaux liquid suitable object

In hot and humid weather, avoid applying Bordeaux liquid to potatoes, grapes, melons, tomatoes, peppers and other crops; be careful with peaches, plums, apricots, cabbages, lettuce, soybeans, beans and other crops.

Configuration method of Bordeaux liquid:

Preparation of Copper Sulfate and Lime Milk

1. Mother liquor IRG 2% copper sulfate 200mL. Weigh 4.0g copper sulfate, put it into 250mL beaker, add a small amount of water first, wait for copper sulfate crystal to dissolve completely, then dilute to 200mL, set aside.

two。 Maternal liquid II:2% lime milk 200mL. Weigh 4.0g quicklime, put it in a 200mL beaker, add a small amount of water, rest 15min, do not stir, make it completely emulsified into paste, then dilute it with water, filter with gauze, transfer to 250mL beaker, make 2% lime milk, set aside.

Dissolve copper sulfate according to half of the water consumption, and the other half dissolve quicklime. After completely melting, slowly pour both into a spare container and keep stirring. You can also use 10%-20% water to dissolve quicklime and 80%-90% water to dissolve copper sulfate. After it is fully dissolved, the copper sulfate solution is slowly poured into the lime milk and stirred to form Bordeaux solution. Remember not to pour lime milk into copper sulfate solution, otherwise the quality is not good and the effect is poor.

Copper sulfate in Bordeaux solution is toxic, so be careful when applying it to crops to avoid poisoning by mistake. If someone eats the solution by mistake, you can immediately eat a large amount of egg white and immediately contact for medical treatment.