Bordeaux liquid widely used growers and gardeners in many crops to protect them from the whole number of fungal and bacterial diseases. So what is caused by such wide popularity of this drug and how wisely it cook?
Bordeaux fluid was invented during the second part of the XIX in the French district of Bordeaux – hence the matter and the name. Fungicide consists of copper sulfate and lime. At first, they worked vineyards to struggle with mildew, but to the present time have significantly proved its effectiveness in destroying agents of very many diseases of cultural plants.
How to properly prepare the Bordeaux liquid?
This drug is a mixture of milk of lime and copper sulfate. In the process of its preparation is required to follow, to the mutual reaction of lime and sulfur – acidic copper flowed exclusively in an alkaline environment. Only under this condition are formed sufficiently small particles of sulfur – acidic copper, Have pronounced fungicidal action, so how they securely adhere to the sprayed plants, and for a long time is not washed away with them. Signal order, that the technological process of preparation of Bordeaux liquid was met is the appearance in the final product a bluish gelatinous precipitate, which is long It resides in the mixture in suspension form.
To obtain ten liters of one percent Bordeaux fluid you need a hundred grams of copper sulfate, such as the number of the burnt lime and eight liters of filtered water. The main components are diluted in different containers. Copper sulfate is poured into a vessel of clay, wood, copper or glass. and pour a liter of tepid water. In a separate boat, alone produce extinction burnt lime with the help of the same volume of water. Next, the prepared solutions are combined by pouring copper sulfate into the milk of lime ( but not the other way around !) With constant stirring with a wooden stick. In the resulting the mixture is introduced water such manner, that its amount has increased to the required 10 liters and more time all thoroughly kneaded. For that, to make the three percent the Bordeaux liquid above the amount of copper sulfate and quicklime lime is necessary simply to multiply on three.
Before the treatment plant in order to avoid burns, leaf reaction solution definitely check with the help of litmus paper: alkaline Wednesday is her turning blue, and acid – redness.
Let ‘s look at some errors in the preparation of Bordeaux liquid, which will help to identify the test described above. Excessive lime content dramatically reduces the effectiveness of the drug – the precipitate quickly falls off, the liquid is unevenly distributed over the sprayed surface. In such a solution, the litmus test becomes visible bluish tint.
If in preparation to shift the copper sulfate, then he will be strongly phytotoxic. In such a mixture, litmus paper usually turns red, which indicates an acid reaction.
If in your possession is not available to set of litmus paper, the correct preparation of Bordeaux fluid can check this way: dip into it any nezarzhavevshy iron object ( for example, garden tool, a piece of wire, stud and so on . N .). Education on such subject reddish spots sulfates copper indicates that fluid is unsafe to use for the treatment of garden and vegetable crops. The case in fact, that the excess copper may be the cause of the occurrence of burns on the sheets of paper, stems, and other delicate parts of the plant. To normalize the acidity of the solution, In it you need to pour the lime milk in this volume, to put in the liquid object over not stained red.
The Bordeaux liquid is extremely desirable to use for its intended purpose in the day of preparation. Already through the day after a batch of its quality dramatically reduced – particles fungicide poorly adhere to the treated surface.