Many summer residents on hearing the drug such as Bordeaux liquid. The use of fungicides in gardening began with it. We tell what Bordeaux liquid is, how to prepare it and properly use it in the garden.
Bordeaux liquid, known to many summer residents, is the first fungicide in the world, still actively used to protect fruit and berry crops from fungal diseases. The mixture was invented in the 2nd half of the XIX century. French botanist P. Milhard, who lived in Bordeaux.
One of the first Bordeaux labels and a portrait of its inventor - Pierre Marie Millarde (1838-1902)
Nowadays, Bordeaux liquid is used to combat common plant diseases, such as:
- rust, scab, fruit rot, powdery mildew (in fruit crops);
- macrosporosis, late blight (in tomatoes, potatoes);
- Septoria, peronosporosis, anthracnose (in cucumbers);
- mildew (grapes);
- spotting (raspberry, strawberry), etc.
The composition Bordeaux mixture
In essence, Bordeaux liquid is a solution of copper sulfate in lime milk (hydrated lime). Copper sulphate (copper sulphate) has a disinfecting effect, and in combination with calcium hydroxide (lime water) it forms copper sulphate compounds, which are able to effectively neutralize a variety of harmful microorganisms.
How to cook Bordeaux mixture
Bordeaux liquid, the preparation of which is not particularly difficult, although less toxic than copper sulfate, still take care of your safety when starting to work with the mixture:
- all actions are carried out in protective clothing, as well as gloves, glasses, respirator;
- The containers in which the solution is mixed, do not use it for other needs in the future;
- Dispose of the remaining solution, buried in the ground outside the territory of the garden.
Prepare the drug should be directly on the day of use. If work in the garden is transferred the next day, add 5–10 g of sugar to the fungicide to save it.
So, 1% Bordeaux mixture - step-by-step solution preparation:
Step 1 Prepare 2 non-metallic containers (suitable for glass, enamel or earthenware) with a volume of at least 10 liters.
Step 2 Dissolve 100 g of copper sulfate in 1-1.5 liters of hot water. Then gradually pour 4 liters of cold water.
Step 3 In the second tank, extinguish 100-150 g of quicklime, pour 1-1.5 liters of hot water, and then gradually pour in 4 liters of cold water.
Step 4 Mix each solution thoroughly.
Step 5th. Add a thin stream of copper sulphate solution into a container with a solution of lime (but not vice versa!) And mix gently.
You should have a bright blue liquid.
Check if there is too much vitriol in it. To do this, lower the stainless iron object (for example, a nail) there and take a close look: if there is a copper deposit on the metal, then you need to add a little more lime solution.
To prepare a 3% solution of Bordeaux liquid, use 300 g of copper sulphate and 450 g of lime.
Why do I need Bordeaux mixture and how to dilute it, we figured out, now we proceed to the question of how to properly apply this drug in your suburban area.
Bordeaux fluid: instructions for use
Bordeaux mixture in the spring is effective for prophylactic ("blue") spraying: during the period of swelling or the start of bud break, plants are treated with a 3% solution of bordeaux liquid. During the active growing season (when the plants already have leaves) a weaker, 1% solution of fungicide is used.
Bordeaux liquid can not be mixed with other drugs, as well as used simultaneously with other fungicides.
In the fall, Bordeaux mixture is used in a more concentrated form (3%) than with the early spring treatment, since the foliage of opal and burns can not be afraid. Autumn spraying protects against seed fungus (pear, quince, apple) and stone fruit (cherry, apricot, plum) trees.
Bordeaux Cucumber Liquid
Just like tomatoes, cucumbers are sprayed with 1% Bordeaux liquid (1.5-2 liters per 10 square meters). The first prophylactic treatment is carried out at the stage of 2-3 true leaves, then repeated 2-3 times with an interval of 10-12 days.
The last spraying Bordeaux liquid should be carried out no later than 20-25 days before harvesting.
Bordeaux Potato Liquid
The first treatment is carried out before planting potatoes: the tubers are sprayed with 1% Bordeaux liquid 1-1.5 hours before planting. Then, when the potato bushes reach a height of 15-20 cm, spraying is repeated at the rate of 0.5-1 l of the mixture per 10 sq. M. The treatment is repeated after 12-15 days.
Bordeaux Grape Liquid
In the phase of the "green cone" (the kidney has not yet dissolved, the green tip is only visible), the vines are sprayed with 3% Bordeaux liquid. During the growing season, use a weaker, 1% solution of the drug.
It is necessary to spray the leaves of plants from the outside and the inside.
Bordeaux currant liquid
Currant bushes (also gooseberries, raspberries) are treated with Bordeaux liquid to prevent spotting. The first spraying is carried out in early spring, using a 3% solution, for the next 2-3 treatments prepare a 1% solution of the drug.
Bordeaux Tomato / Tomato Liquid
If tomato seedlings show signs of disease (gray, brown or black spots on the leaves), treat the seedlings with 1% Bordeaux liquid with a spray bottle.
For the prevention of late blight and other diseases, spraying tomatoes with Bordeaux mixture is carried out from the end of June - beginning of July (or 2 weeks after planting) at the rate of 1.5-2 liters of solution per 10 square meters. Whole plants are sprayed 3-4 times with an interval of 10-14 days.
Bordeaux strawberry liquid
After snow melting, garden strawberries should be treated with a 3% solution of Bordeaux mixture (0.5-1 l per 10 sq. M). Then, in the stage of growth of leaves, spraying is repeated, reducing the concentration to 1%. The following procedures are carried out at the beginning of the appearance of the buds and after harvesting (in these cases, a 1% solution is also used).
Bordeaux tree liquid
In the spring, before bud break, trees are sprayed with 3% Bordeaux liquid (10-15 liters per adult and 2-3 liters - on a young tree). Then, in the “green cone” phase, the treatment is repeated with a 1% solution of the preparation, the next spraying is carried out after the trees bloom. Further processing is done at intervals of 10-15 days, and their number should not exceed 6 sprayings per season.
As an alternative to Bordeaux mixture, drugs of similar action can be used, which also include copper oxychloride (Polykh, Oxyx, etc.). Such tools can be treated "from the inside", penetrating deeply into the tissues of plants. In addition, they can be mixed with other substances.
- Garden garden treatment for pests and diseasesPlan protective measures in the garden.