Content
- Thuja diseases - symptoms and control measures
- What are the diseases of Thuja?
- Recognize symptoms
- Pest infestation by the miner moth
- Fungal attack of the Thuja
- Fight diseases of Thuja
- Tips
Fungal diseases are among the most common diseases
Thuja diseases - symptoms and control measures
Basically, the tree of life is a pretty robust plant for the hedge. Nevertheless, Thujen often turn brown. Responsible for this are diseases that can occur due to care errors or external circumstances. What are the symptoms and how do you combat the diseases of Thuja?
What are the diseases of Thuja?
Diseases are less common. Thuja usually gets ill because it was not properly cared for. Especially with the supply of moisture it comes to care mistakes. Either the hedge was not poured often enough or there is waterlogging on the site.
Incidentally, a discoloration of the needles is also caused by over-fertilization with mineral fertilizers or in winter by road salt.
If the needles of the Thuja turn yellow, they can be symptoms of a magnesium deficiency. This can be combated with a fertilizer by Epsom salts.
Recognize symptoms
Whenever the tree of life changes color, the gardener should search for the causes. When the thuja turns brown in autumn, it is a natural process. She then drops old needles.
If only the shoot tips are brown or yellow, white spots appear on the trunk or the whole tree seems dried up, either wrong care or illnesses are responsible.
Pest infestation by the miner moth
Brown shoot tips can be triggered by an infestation of the miner moth. As symptoms show up in addition to the brown tips feeding in the shoots. On the needles are small black dots, the pests of the pests.
Fungal attack of the Thuja
Fungal diseases are caused by discolored needles, which become very soft. The infestation begins at the shoot tips and continues fairly quickly to the trunk.
If the trunk below is whitish and patchy, the root cause could be root rot. It is caused by transmission of fungal spores and is favored by moist, dense sites.
Fight diseases of Thuja
If the illnesses of Thuja have been triggered by wrong care, the tree of life can often still be saved. Either provide better drainage or pour more regularly. Be economical with mineral fertilizers and use organic fertilizers like compost or manure.
If the thuja is attacked by pests, cut off all infested parts. If you have to cut into the old wood, the Thuja does not drive there again.
In a fungal attack, it depends on how strongly the tree of life is affected. With severe damage and advanced root rot, all that remains is to completely clear the tree of life and exchange the soil. In the hedge, the adjacent healthy trees must be treated with fungicides. This is the only way to prevent further spread.
Tips
If the thuja turns black, it is not a disease, but a manganese deficiency. It is triggered by too acidic soils. Fight this deficiency by licking the ground.