These flowers are on almost every flowerbed. Therefore, the question: what ill phlox and how to treat these flowers, always relevant. The most common reason that they do not develop and disappear is their diseases or damage by pests. It may be a viral, fungal, or mycoplasmal infection. They all spread very quickly. Of insects, plants most often affect nematodes; they are loved by caterpillars of butterflies and slugs. Next, consider phlox disease with photos and their treatment.
Why do flowers get sick?
At the first symptoms, it is necessary to treat both the affected specimens and the rest of the plants. This procedure is necessary for the purpose of prevention. But some gardeners can not understand why phloxes disappear, because the diseases of flowering plants in their beginning are difficult to recognize. Therefore, it is necessary to make it a rule to carefully inspect the beds once every two weeks in order not to miss the beginning of the disease.
It is very important to disinfect a garden tool through which infection can be transmitted. This will prevent disease.
Improper care can also be the cause of death:
- insufficient watering;
- transplant in summer or late spring;
- growing on too acidic soil;
- use too cold water for watering in the heat;
- untimely thinning of landings.
What are phlox diseases and how to treat powdery mildew?
This disease affects the leaves of plants only in hot weather with low humidity. Flowers are actively infected in the second half of summer. The lower longlines are the first to suffer, then the disease spreads to the stem and upper foliage. Its causative agent is a fungus. Treatment of such a disease as powdery mildew, phlox rather laborious.
The best way to combat this infection is preventive treatment. To do this, from the beginning of summer, flowers should be periodically disinfected with copper-based products, Topaz or any other fungicide. A good result is given by spraying with a solution of furacillin prepared at the rate of 20 tablets per 10 liters of water.
Regardless of what phloxes are sick of and how to treat these plants, other crops that grow in the neighborhood should also be processed.
Preventive measures against powdery mildew are:
- regular bush replacement( every 4 years);
- thinning stems for better ventilation;
- land digging;
- timely removal of the affected leaves and stems and burning them;
- cultivation of varieties more resistant to diseases.
If the disease struck the plants, do not despair. There are many options than to treat phlox from powdery mildew.
Disinfection can be performed:
- with any copper-containing preparation( for example, vitriol);
- mixture of vitriol( 20g) and soap( 150g) dissolved in 10 liters of water;
- soda( 50g) with soap( 50g), dosage also for 10 liters of water;
- infusion of ash( 10 water and 3 kg of ash).
Spraying is carried out several times at weekly intervals. After flowering, phlox is cut and processed again. Good results are obtained with the use of Topaz, Topsin or Skor preparations with an interval of 10 days. It is also possible to spray these drugs for the prevention of diseases throughout the growing season of the plant.
Why do the leaves turn yellow?
If you are looking for why the leaves turn yellow in phlox, it is possible that the flowers were struck with "jaundice" - a mycoplasmal disease caused by pathogenic microorganisms. Additional signs of the disease is the dwarfism of flowers and the deformation of the leaves. The infection is carried on the ciccades, so it spreads very quickly. More than 200 species of plants suffer from jaundice. To catch such an infection is easy. This insidious disease has a very long incubation period - up to two months. Therefore, it can manifest itself in the next phlox flowering season. Older specimens are sick much more often than young ones.
grapes They fight jaundice by taking such measures:
- systematically thin out the bushes, they are transplanted every 3-4 years;
- in June, for the purpose of prophylaxis, they treat with Fundazole or Zineb;
- strongly yellowed plants destroy.
White bloom on phloxes
Beginning gardeners are perceived by any white bloom on the leaves as powdery mildew. But peronosporosis is often “masked” under it. Another name is downy mildew. Its difference is that it develops on plants exclusively at high humidity and lower temperatures. Downy mildew affects phlox in late summer and early fall. Contribute to the spread of infection dense planting and the presence of weeds in the garden beds. It covers the plates with a thin white patina, because of this they cannot carry out photosynthesis. The leaves curl and gradually die off.
How to treat white bloom on phlox:
- treat all bushes with preparations based on copper, Bordeaux mixture, Topaz, Home;
- cut the affected leaves and burn them;
- from the beginning of the summer every two weeks to spray the plants for the prevention of a solution of copper or pollinate sulfur with an interval of 10 days.
Both false and true powdery mildew infects the flowers from the bottom up. Therefore, it is important to regularly inspect the lower tiers of landings.
Filamentous and fern leaves
These symptoms cause viral disease of flowers. They are the most difficult in terms of treatment. Plants with such lesions to save very hard.
When the phlox is flossy, their shoots become fragile, the bushes grow very low, they do not bloom. The leaves are narrow, filiform, often with wavy edges. In the second case, phloxes resemble a fern: on them appear very small leaves attached to the central vein. Both types of deformation of the plates lead to the fact that they can not fully perform their functions. The plant does not develop well.
There is no effective method for the treatment of filamentous and fern leaves. Affected specimens must be excavated and destroyed, and the soil treated with formalin or solution of blue vitriol. Cutting affected phlox should not be.
They transfer nematode viruses, so pest control is one of the effective measures to prevent phlox virus diseases. Effective preparations are Carbation, Chlorpicrim, Nemagon. It is also recommended to carry out soil disinfection before planting with Acarin or Fitoverm. Favorable to plant next to the beds of phlox nasturtium. She scares away nematodes.
Treat phlox, like other plants, difficult. Therefore, in order not to look for what phloxs are sick of and how to cure them of any damage, it is better to prevent the occurrence of diseases in advance. And for this you should follow the proper care of flowers.