2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
The time for planting aster seedlings in open ground is approaching. Usually this period falls on the second half of May. But let's remember what diseases can lie in wait for a flower until this moment in order to protect seedlings from death and enjoy bright flower beds in your garden during the summer and autumn months
Blackfoot prevention: the right container and clean soil
First of all, aster seedlings suffer from black leg. Many amateur flower growers could see and complain about how seedlings literally lie on the ground in bowls on the ground one after another. This is the same black leg.
For the prevention of this fungal disease, it is recommended to process the seeds before sowing. And also disinfect the soil. For example, pour a solution of phytosporin. But this does not guarantee that the seedlings will not get sick and the seedlings will not die. In the process of growth, there will be many more factors that can affect the development of fungal disease, even seedlings from treated seeds.
An important factor in protecting against blackleg is choosing the correct container for the seedlings. It is impossible that moisture stagnation occurs in it. Therefore, the container must have drainage holes.
The soil should be loose, but moisture-consuming. If the soil is too dense, knocked down, even without stagnation of moisture in it, a fungal infection can develop. Salvation from this is watering with a solution of biofungicides.
Another danger with too wet soil is hypothermia of the seedlings. If the windows are often opened in the room where the seedlings grow, and the weather is cold outside, there is again a risk of developing a fungal disease.
How to treat diseases at the stage of seedlings and seedlings: black leg
What to do if you notice a diseased plant in your container? Will the disease spread to other flowers as well? Or urgently replant healthy seedlings from an infected container?
Don't panic! You can still save the seedlings. But for this it is urgent to use special drugs. They are produced in tablets, powders, solutions and will help prevent the spread of the infection to other seedlings.
And it is not worth diving and replanting seedlings ahead of time. They can be infected. And weakened by the disease, it will be difficult to take root in a new place. In addition, the pathogen will migrate along with the infected soil to another pot. First, it is worth improving the seedlings. And only then proceed to the pick.
At the stage of picking, there are also possible risks. The transplant is done very carefully, trying not to damage the root and not touching the root collar with your fingers - the Achilles heel in front of the black leg. Water the soil before diving so that the ground is not dry and does not tear the roots. And then carefully, using a fork or spatula, remove the seedlings and transplant them into a new pot. It is not necessary to compress it strongly with earth. It is better to shed so that the soil itself envelopes the roots. And then add earth, burying the plant into the ground up to the cotyledonous leaves.
Fusarium wilting: what to do when the disease manifests itself in a flower bed
Another fungal disease that can affect a plant at the seedling stage, but so far invisible to the eye of the grower, is fusarium wilting. It is often possible to detect ailments already in the flower garden, when barely blossoming buds begin to wither and rot in the flower bed.
The disease is transmitted through soil. Therefore, it is so important to decontaminate the soil in which the seeds are sown. And also - the pathogen can wait for seedlings in a flower bed. And for the prevention of infection, experienced flower growers recommend not planting asters constantly in the same place from year to year.
If it was not possible to protect your flowers from fusarium wilting, you need to get rid of the first flowers on which the disease manifested itself as soon as possible. They should be dug out with a clod of earth. And pour the remaining flowers abundantly with a fungicide solution.
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