2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Blackleg is a fairly widespread disease of seedlings and seedlings. It manifests itself in the form of noticeable darkening in the area of the root parts of the stems during the cultivation of seedlings. The basal parts of fragile stems first become watery, and a little later turn brown and begin to rot. The black leg is especially harmful on waterlogged soils and in wet weather, therefore, these indicators must be carefully monitored
A few words about the disease
The tissues of the root necks of plants, when damaged by a black leg, soften and turn black, and the fragile stems become thinner and, after some time, lie down.
Adult seedlings are attacked by a harmful fungus called Rhizoctonia solani. The causative agents of the destructive black leg remain in the soil in the form of sclerotia, oospores or cysts, the accumulation of which is noted during the permanent cultivation of cabbage seedlings in greenhouses and greenhouses.
The development of this ailment is favored by high temperatures during the cultivation of seedlings, along with high acidity and moisture of the soil.
Most often, the following cabbage varieties are susceptible to blackleg infection: Belorusskaya 455, Amager 611 and Moskovskaya late 9.
How to fight
Perhaps the most important way to protect yourself from a black leg is to properly care for cabbage seedlings. Both planting seedlings and picking seedlings should be timely. Before planting, it is recommended to pickle seeds with Planriz or TMTD. Biological preparations such as "Fitolavin-300", "Fitosporin" and "Baktofit" are also suitable for disinfecting seeds. For this purpose, you can use more effective chemicals ("Cumulus DF" or "Fundazol"). Such dressing contributes to the destruction of blackleg pathogens on the seeds. However, at the same time, one should not forget that the causative agents of this disease can also be found in the soil.
Also, for cultivation, it is better to select cabbage varieties resistant to black leg (Kazachok and a number of others).
It is important not to allow unnecessarily thickened crops. Lack of ventilation, excessive watering and elevated temperatures are also provocateurs of blackleg development. During watering, it is important to remember that the soil in no case should be waterlogged.
Three days before planting seedlings, the soil in greenhouses and in the beds must be watered with a solution of colloidal sulfur (ten liters of colloidal sulfur water will require about 40 g). Sulfur-containing preparations such as Cumulus DF or Tiovit Jet are also suitable. Also, the soil in greenhouses before planting seedlings, experienced summer residents are advised to water it with a hot solution of potassium permanganate - for five liters of water it is taken 1.5 g. Usually, such a volume of solution is consumed per square meter. In the same way, the soil is prepared for seedlings.
Periodically, the soil in greenhouses and hotbeds should be thoroughly disinfected by steaming or replaced. You can also spill it with Fitosporin. Also, the soil is regularly lime, since the acidic environment is the best assistant in the development of the black leg.
During cultivation, seedlings are systematically watered with potassium permanganate, and a mixture of ash and sand is poured onto its stems with a layer of about two centimeters, or simply river sand.
If foci of the disease were noticed on the seedlings, then the affected vegetation is carefully removed, then all the seedlings are watered with a pink solution of potassium permanganate (10 liters of water will need it from 3 to 5 g), and after that, during the week, all watering is stopped altogether.
Good large seedlings affected by a black leg can be tried to reanimate by cutting off the stems just above the damaged areas. The cuttings formed as a result of such pruning are placed in water until roots begin to appear. You can add special root formers to the water.
It is noteworthy that seedlings grown in plastic cups, as well as in peat cassettes and pots, are practically not affected by the ill-fated black leg.
Recommended:
So That The Cabbage Tied An Excellent Head Of Cabbage
Many vegetables in our garden are not very comfortable - they are thermophilic and would be happy to warm themselves in a greenhouse. But for cabbage in the middle lane - the very place! Moreover, this year's summer turned out to be just the right one, as culture loves - cool and rainy. But, as you know, the nature of the weather is capricious, and her mood changes quickly. What care will the cabbage require in case of the return of hot days and what else do you need to know about its cultivation?
We Fight With A Black Leg In Seedlings: Prevention And Treatment
Perhaps this is one of the most dangerous and insidious diseases that can destroy all your seedlings: the black leg is completely unpretentious in choosing a place of residence and affects any seedlings, from flowers to vegetables
Cabbage Why. White Cabbage. Continuation
Many questions arise about the main vegetable on our table - white cabbage. Let's find answers to some of them today. We will tell you about increasing seed germination, better neighbors, harvesting times
Cabbage Why. Chinese Cabbage
Many people like the juicy heads of Peking cabbage with an unusual taste and delicate structure, lying on the shelf in the store in winter. I would like to grow the same ones on my site. For many years we have been purchasing ready-made seedlings from sellers in the spring, but the result is zero. Some yellow flowers adorn our beds. What is the reason for these failures?
Cabbage Why. White Cabbage. Start
Every summer resident wants to get an excellent harvest of vegetables, fill the bins with quality material. Sometimes ignorance of elementary agrotechnical techniques negates all the efforts spent. Today we will discuss several important points on the path to success
