A red descendant of the hawthorn
The cultivar Paul’s Scarlet des Crataegus laevigata - the two-pronged hawthorn - is regarded as a real hawthorn. It is therefore a carmine-red flowering form of this native hedge wood. Accordingly, the hawthorn also has very similar properties and requirements - so it delights with the hawthorn-typical, decorative lobed foliage and loves the sun and nutrient-rich, chalky soils just as much as his white flowering ancestor.
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Similar disease risks
Fire blight
Unfortunately, the hawthorn also has certain disease risks in common with the hawthorn. Although it is very tolerant of frost and city air, it is prone to fire blight. This bacterial disease is very dangerous and has to be reported to the plant protection office because of its strong transmission potential to other rose plants, especially pome fruit trees.
If a hawthorn is infected, it shows darkly discolored branches and dried up shoot tips that look like burned.
Unfortunately, this disease cannot be cured well and is therefore so feared. Without countermeasures, hawthorns die off after one to two years, and young plants are killed after two to three weeks.
If the disease is diagnosed (which can clearly only be done in the laboratory), the diseased parts of the plant must be cut out very generously. If the infestation is more severe, clearing is necessary. The infected material should be incinerated if possible, in the case of larger quantities in a waste incineration plant if necessary.
In order to prevent the fire blight, you can be with during the riskiest time in summer use special yeast preparations in warm, humid weather that prevent the pathogen from penetrating the Hinder plant.
To note:
- Fire blight very infectious, reportable bacterial disease
- In the event of an infestation, cut back or Clearance necessary
- Burn diseased plant material
- For prevention: yeast preparations
Web moth
Another risk to the health of the hawthorn is that Web moth. It eats up the leaves of the plant and covers them with conspicuous, white webs.
An infestation can best be combated mechanically at first by spraying the hawthorn with a strong jet of water. It is effective, albeit laborious, to scrape the still pupated caterpillars from the branches in late winter. In the case of spun moths that have already hatched, pesticides cannot penetrate the pests through the webs that are created - in this case, remove the webs by hand.