beetroot Signs of cercosporosis: fungal pathogen and its treatmentbeetroot rich in microelements - is a favorite habitat for many pathogens. You need to know the diseases of beets: their photos, description and treatment - this is something that every gardener will definitely need. Because due to diseases, the yield of the root is significantly reduced. If you do not take any measures, you can lose up to 70% of the crop. To avoid losses, you need to know the first signs of illness. This will help them in time to detect and take appropriate action. It is also necessary to have an idea about the primary and secondary sources of infection.
Signs of downy mildew or beet peronospora
That disease affects beets in every region of our country. At the root of the first year of growth there is a twisting, thickening and fading of the leaves. Why do beets turn yellow leaves? Because they were affected by fungal spores, which are clearly visible on the lower part of the leaf in wet weather. The first sign of fast leaf wilting is a violet-gray bloom on the sheet plate. The affected leaves first become pale gray, then turn yellow, dry out or begin to rot.
Later, the infection spreads to the central socket, the buds on the periphery, flower shoots, perianth and seeds. Therefore, it is impossible to collect high-grade seed material from such plants.
In one season, the mushroom can give several generations a dispute. And the development of the disease is very conducive to increased humidity and cool temperatures. In order for the fungus to germinate and begin to share, it requires drip moisture. Under suitable conditions, the time of maturation of the dispute is reduced from 8 to 5 days.
Sources of infection are:
- Self-seeding plants, wintered after harvest;
- Sick roots of this year: removed from the beds, but left within the site;
- Sick root crops of last year, which remained in the ground, and this year formed their own outlet;
- Infected Seed.
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Signs of ascochytosis of beets
Lower, old leaves are covered first with blue-green spots, which later become necrotized brown spores. In the center of the brown spot is a lot of dark spots - this is the concentration of pathogens.
Following the leaves, the fungus infects flower stalks, seedlings and even root crops. During one vegetative period of a beet the mushroom can give some tens generations. Damaged tops quickly die off, because of this, the development of the vegetable stops, and the yield of the plot decreases by no less than 15-17%.
And you can get rid of ascochitis and perinosporosis only with the help of fungicides. In addition, it is very important to observe the correct fertilizer system. It is necessary to form it taking into account the needs of the soil and the vegetable itself. Doses of top dressing should be not only balanced, but also justified by the urgent need of root crops.
Symptoms of chalcosporosis: a fungal pathogen and its treatment.
Beet churx is the spotting of a leaf plate that a pathogenic fungus causes. Every year this disease deprives many summer residents of their legitimate harvest, because it develops very quickly and aggressively.
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At the vegetable itself, this disease appears under the guise of numerous round and oval spots that have a gray-brown shade. The spot has a characteristic brown necrotic fringe. The diameter of the fungal infection - up to 6 mm. Over time, the necrotic parts merge, and the whole leaf is affected. Shrunken fabric disappears.
If urgent measures are not taken, the fungus-pathogen will very quickly pass from the focal form of existence to the occupation of the whole plot. With such active reproduction there is a big risk of the death of all green tops.
Measures to combat the bee-ripening of crown spawn are as follows:
- Preventive treatment of beet plots with Rex Duo and Abacus preparations. The consumption rate for preventive measures is 0.7 liters per hectare.
- Urgent use of fungicides such as Abacus, Rex and Tango. Which are characterized by high antifungal effects. And also have the greatest protection period, until harvesting. This method is most effective in the early detection of infected plants;
- Collection and incineration of infected plants. All manipulations on the disposal of spore-bearing parts are best carried out outside of their site, which will help to avoid the spread of the fungus by air.
Red beet leaves and petioles: diseases or nutritional deficiencies
Why do beets have red leaves? This situation is often observed both at the time of sprouting of the seedlings, and in open beds.
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In the first case, a variety of factors can be the primary cause, for example, instead of river sand, soil sand was mixed into the soil mix. With such poisoning, the plants need to be transplanted urgently, and their roots thoroughly washed with water.
Also, the leaves of the seedlings may turn red if additional dressings were additionally added to an already fertilized factory soil mixture. With an excess of trace elements - the tops of the seedlings first turn red, and then it dries and dies completely.
What to do if the red leaves of the beets appeared already in the open field? The reasons that could cause redness in this case may be much more:
- Insufficient amount of phosphorus fertilizers applied. The solution to the problem is very simple: just add the necessary preparations to the soil.
- Increased acidity of the soil. Alkalization or oxidation of the soil prevents the absorption of the necessary fertilizer and minerals by the beets. Therefore, the growth of the root is minimal, and its tops take on a purplish-red hue. Solution: pour the area with lime milk, and thus "deoxidize" the soil.
- Sodium deficiency. Solution of the problem: at the next watering, add salt to the water, in the ratio: one tablespoon of sodium per 10 liters of water. After the earth coma dries out, you can sprinkle the plot with wood ash, which will help the plants to stock up on essential minerals.
How to grow beautiful, tasty and healthy beets - video
