Garden

Sick piracant


Question: pyracantha diseases


Hello, I will contact you because I don't know exactly who to contact. I own a 10 year old Piracanta hedge and now a plant has completely dried out, becoming completely rust colored. The same effect is starting to have another plant and I believe that if I don't do something, it will be the same for everyone. Can you help me? If you need photos, I have them. Thank you and good day. Sara

Sick pyracant: Answer: diseases of the pyracantha


Dear Sara,
the piracante are widely used to prepare hedges because, although they can be attacked by aphids and cochineal, parasites usually cannot ruin the plant, which is therefore practically free of insect problems. There are two problems that can more easily attack the pyracantha, with even lethal effects; the first is the root rot, which develops only in conditions of very high humidity, located at ground level, with tinned water for long periods of time. It seems to me unlikely, however, that only one plant of the row was affected by this pathology, which is often due to watering or to the climate, and therefore should have hit all the plants at the same time; unless the diseased plant is not the one positioned in an area where the soil has some particular problems. The other problem that can affect the pyracanth, and all rosaceae in general (from roses to photinia, from apple trees to quince, is the blast of fire; it is a bacterium, arrived in Europe from North America, which usually lives on the bark of plants, when the climatic conditions prove to be suitable (and usually in spring and summer), the bacterium takes advantage of cuts in the bark, abrasions caused by insects, any weapons broken by the wind, to enter the organs of the plant, where it has a very rapid development: the bacterium strikes the wood, causing the foliage of the foliage.Usually at the beginning the plant seems to have been hit by flames of heat, as if a small fire had been set next to it (from this symptom derives the common name of the disease); very quickly the plant becomes completely sick and dies, because the disease evolves developing rameal cancers, which can also reach the stem, and therefore the entire floor ta. Against this type of disease one can only remove the diseased plant, and destroy it quickly, burning it; consider that often on infected branches, which tend to turn red in the pyracantha, there is a milky substance, which contains thousands of live bacteria, ready to move to another plant. Then, after removing the diseased plants, also possible branches of the neighboring plants are cut, which show withered or ruined leaves, taking care to disinfect the scissors well after each cut. Since this type of pathology is very particular, before you worry, it is perhaps the case that you call an agronomist who can come and see your hedge.