P:On the parsley and carrot leaves that I always grow in my vegetable garden, I noticed a grayish coating. It has the form of spots of various sizes, as if made of dirty flour. Is it some kind of disease? How to fight it?
O:The symptoms in question indicate a fungal disease occurring, among others, in on plants from the umbellate family, which include carrots and parsley.Probably the vegetables were affected by umbellate powdery mildew.
The occurrence of disease symptoms at the beginning of autumn, i.e. at the end of the growing season, does not seem to have any impact on the growth of roots, their value and yield.I suggest that you do not perform any spraying.It is worthwhile however, take care of the proper crop care in advance.
This type of mildew infects many plants, including weeds. The fungus can hibernate on plant debris and seeds.In spring, the disease develops e.g. on weeds from which spores are transferred with the wind to cultivated species, e.g. carrots or parsley.
The infection usually occurs in the morning or night fog, i.e. when the air humidity is high, but plants suffering from drought are particularly vulnerable to disease attack. Therefore, it is worth taking care of providing them with water.
Of course, weeds should be removed regularly. Also, you should not grow plants that are too compacted. If the first symptoms of the disease appear in spring or summer, spraying can be applied.Appropriate biopreparations will be available on the market to help fight or prevent the disease.Prophylactically, you can also spray with natural preparations made of nettle or horsetail.
