Why are many gardeners afraid of downy mildew, also known as peronosporosis, which so often attacks onions?
The answer is simple – fungal spores fly almost at the speed of light, affecting all plantings in the shortest possible time.
The most offensive thing, perhaps, is that the disease does not spare onions, no matter what phase of growth they are in.
As a result, the feathers quickly “bend”, and the heads do not fully ripen and therefore cannot boast a long shelf life.
Perhaps the most important thing that is required of a gardener is to recognize the disease in time.
The disease can be recognized by the gray “powder” that covers the onion feathers in the infected areas, causing them to turn yellow, white, and eventually rot.
There is also good news: this disease is afraid of copper-containing drugs like fire.
Therefore, if you do not want to lose your onion harvest, stock up on compounds such as Hom, Oxyhom or a 1% solution of Bordeaux mixture.
