Leaves turn yellow at room gerbera: why is this happening and what to do for prevention?

Many gardeners choose gerberas for their unpretentiousness, as well as for the ease of care. However, they also have some peculiarity.

With improper care, these plants begin to turn yellow. This can happen due to different circumstances.

In this article, you will learn in detail why this happens with a houseplant. What diseases she is susceptible to, we also learn how to deal with them.
What to do for prevention.

What kind of flowers are these?

Gerberas are a genus of perennial grasses of the aster family. There are several dozen species, most of which grow in Africa. The flowers resemble the shape of representatives of the genera Nivyanik, Osteosperum or other chamomile. Coloring can be anything but blue.

Addiction to disease

In spite of its unpretentiousness, gerbera has a tendency to certain diseases. For example: Alternariosis, Mosaic, Sclerotinosis. (More on all of these diseases and their prevention will be described below.) Often they are associated with improper care (you can find out about the features of care and growing gerberas at home here, and from this article you will learn about what conditions of detention should be created for garden variety of this flower). The most observed diseases: leaves turn yellow or dry, buds fade, the appearance of plaque of various colors.

In detail about the most common diseases and pests of indoor gerbera, as well as about effective methods of treating flowers, we talked here.

Dryness problems

There are a number of diseases that cause gerbera leaves to turn yellow.. Why does gerbera have this? Here are the most common:

• "Alternariosis" - spots of bright brown color appear on the leaves and petioles. With the further development of the disease, the leaves begin to lighten, gradually acquiring a yellow color. The optimal environment for the development of this disease is humid, moderately warm weather.
• “Mosaic of Gerbera” - spots of sharp limited form appear on the leaves, and also have a yellow-green color. Next, the deformation of the sheet plate occurs. It can ultimately lead to necrosis.

  IMPORTANT! There are a number of other diseases, the symptoms are different, but often the leaves turn gray.

Causes

In addition to diseases, there are many other causes of yellowing of gerbera leaves. Perhaps the most common reason is an excess of moisture. Often this is due to the fact that the pot is much larger than the size of the plant itself. When watering, water accumulates at the edges of the pot, where the roots have not yet grown, which leads to decay of the root system, as well as yellowing of the leaves.

To eliminate this problem, it is necessary to transplant a flower, after which provide constant light, which normalizes the metabolism of gerbera. It is also worth inspecting the roots. Healthy roots are light brown and white. In addition to excess moisture, the cause of yellowing of the leaves may be a lack of light and low humidity.

After all, it is worth remembering that gerbera is that photophilous plant. Increase in humidity of the air, and also increase in illumination will help to solve the problem.

What to do for prevention?

Prevention of problems associated with improper care are described above. What to do for prevention, how to help? We will tell you more about disease prevention., including those that are not associated with yellowing, and with the fact that the leaves are drying.

1. "Alternariosis". To combat this disease, in no case should we allow the weakening of diseases. For prophylaxis, it is necessary to carry out prophylaxis with fungicides ...

   REFERENCE! A good fungicide is Radomil Gold.

2. “Mosaic of Gerbera”. Since the disease is associated with plants from the pumpkin family, it is worth protecting their contact. It is also worthwhile to carry out prophylaxis with insecticides.
3. Powdery Mildew. This disease is most susceptible to young plants. The first manifestations on the petioles.

   It can be recognized by white, and later on gray-white plaque. As a result, the whole plant is covered with this coating, which leads to drying and death of the plant. If a disease occurs, it is necessary to treat with fungicides.

4. "Gray rot". there is a defeat of the base of the leaf, peduncle and flowers. All affected parts are overgrown with gray. The disease can persist in the soil for 1-2 years. It is transmitted with contaminated soil, as well as through the air. The disease gains strength with excessive moisture in the soil and with increased humidity.

   The causative agent is the mushroom "Botrytis cinerea Pers"

   As with the previous disease, it is necessary to treat with fungicides for treatment.

5. "Sclerotinosis". The plant quickly fades. Indented spots appear on the leaves and peduncles, which in the process of intensifying the disease acquire a white or gray-white color.

   The causative agent of the disease is the fungus "Sclerotinia sclerotiorum (Lib.) De Bary"

   For the fight using light aerated substrates. Instead of watering, add dry soil. Fungicides are also used.

6. "Late blight". With this disease, one of the signs is the drying of the leaf from the outside. With the further development of the disease, the inner side of the leaves and flowers begin to dry out, which soon soon leads to the death of the plant. Rotting of the roots occurs.

   The disease persists in the soil for a long time. The spread of the disease mainly occurs through contaminated soil, or through the air. The most susceptible to this disease are plants that are kept at excessively high temperatures, as well as in violation of technology for the use of agricultural technology. The disease develops most at a temperature in the range of 6 to 8 degrees Celsius.

   The causative agent is the Phytophthora fungus.

   For the fight, they use the correct agricultural technology, use aerated loose substrates. When signs appear, watering ceases, and the wet substrate is replaced by dry. Then fungicides are used.

I would also like to bring list of the highest quality fungicides: Previkur, Profit Gold, Radomil, Vitaros, Rovral, Fundazol, Topaz.

In conclusion, I would like to say that although the gerbera is considered not a particularly unpretentious plant, it is still not worth completely neglecting the care of it. In addition, the complex necessary complex is not so big. Good lighting, a suitable pot size, average air humidity, as well as proper watering are the key to the prosperity of your gerbera.

Watch the video: A Beginners Guide: Nutrient Deficiency (December 2024).