Why does dill turn yellow and dry and what to do?
To meet a garden plot or a vegetable garden where even a small bed for greenery would not have been allocated is a rarity. Dill is an ingredient that almost no salad can do without. There are cases when dill grows like a weed in some garden plots, abundantly covering the beds of other vegetable crops. On others, dill, if it grows, is scarce or acquires a specific yellowish and reddish hue. What is the reason for such modifications, how to deal with them?
Plant features
The root system of dill is presented in the form of a rod, which, deepening into the soil, does not form branches. Therefore, for the good development of this plant, a contented deep fertile soil is needed. That is why close-planted dill only initially causes joy to the gardener with its lush bushes. As soon as the plants begin to grow stronger, a real struggle for survival takes place inside the soil, since the development of the root system requires a large amount of vitamins, which are simply not enough for everyone.
With an abundant content of humus in the soil, dill can grow well even on the same bed with demanding potatoes. A big problem for this plant is the high level of soil acidity. Alkaline environment is also undesirable.In this regard, feeding with wood ash, which is familiar to many gardeners, can be detrimental to dill. If you have been trying to get rid of the dill growing on the beds for a long time, then it is enough just to make liming. This is due to the exactingness of dill to the level of acid in the soil.
For good growth and development of the plant, a neutral soil is needed, the litmus test of which will show an acidity level of no higher than seven.
Growing advice
The main factors affecting the proper and healthy development of dill are:
- soil acid level;
- the amount of humus in the soil;
- soil moisture level;
- the presence or absence of pests;
- planting density.
To determine the acidity of the soil, litmus paper is needed. With its help, you can determine whether procedures are required to reduce acid in the soil. The procedure itself is quite simple to perform. To begin with, a shallow hole is dug ten centimeters long. Then a small wet lump of soil is taken and pressed tightly with litmus paper. It will take some time for the paper to soak into the ground. Then, by determining the shade of the paper, you can draw a conclusion about the level of acidity in your garden. With a high level of acid, dill is not recommended to be planted in this area. In order to reduce the acidity, it is advisable to dig up the area by mixing wood ash or lime into the soil.
The high content of humus in the soil significantly increases the decorativeness of the plant, making the bushes more dense and fluffy. However, overdoing it with humus is also not worth it.Otherwise, the fast-growing dill will begin to actively increase in growth, and the stalks that have not had time to get stronger will not be able to hold its weight. Eventually the dill begins to sag and break. In addition, plants overfed with nitrogenous fertilizers are very attractive to aphids, which actively settle on dill leaves.
Watering dill should be moderate. The plant is able to adapt to dry soil. It will begin to turn yellow, trying to retain a little moisture, but will actively “cling to life”. While excessively moist soil will inevitably provoke the death of the plant. In addition, many gardeners believe that the temperature of the water used for irrigation is not critical for greens. However, this is a fundamentally wrong opinion.
The soil moistened with cold water provokes the appearance of measles rot, which first causes yellowing of dill bushes, and then redness. And after some time, the plant begins to dry out.
As a rule, dill is sown "without looking." How many seeds there were, so many were thrown. The first shoots delight with their abundance and decorativeness. Nevertheless, the joy of the gardener passes quickly enough. Since dill begins to acquire a yellowish tint. And all because if, when the first shoots appear, the extra bushes are not removed, so that there is a distance of at least two centimeters between the plants, then there will not be enough nutrients in the soil for everyone, and the plant will simply die.
Many gardeners are perplexed, what is the reason for the reddening of dill. In most cases, the high acidity of the soil, which was already mentioned earlier, is to blame.The phosphorus in it is transformed into an insoluble element that the plant is not able to absorb. Roots that need nutrients cannot get them, which provokes external changes in dill.
If the young dill grows poorly or curls, then it is necessary to feed it additionally.
Diseases and harmful insects
A common reason for the change in the shade of dill to red and yellow is the appearance of harmful insects on the plant. Peronosporosis is a disease caused by downy mildew. It provokes the outer yellowing of the leaves, and a white coating appears on the inside. Dill affected by the disease immediately begins to dry out and subsequently dies.
For a disease called fusarium, it is common to manifest itself in the appearance of yellow leaves. The change in shade occurs from the lower leaves, subsequently affecting more and more of the plant. After some time, the dill acquires an already saturated burgundy hue, which is enhanced by the occurrence of root rot. Stems acquire pronounced yellowish and reddish veins.
Verticillium wilt is characterized by clogging of dill vessels, which provide nutrients from the soil to the plant structure. Their blockage reduces the amount of vitamins and minerals received by the plant, which adversely affects the growth and development of dill. As a rule, the stems begin to turn yellow in early summer and completely dry out by the end of the month.
One of the most dangerous pests for this plant is aphids. Her main food is dill juice. Aphids are characterized by rapid reproduction.One female is capable of laying up to one hundred and fifty larvae every fourteen days.
You can visually determine that the plant is susceptible to the disease by deformed upper leaves.
Ways to get rid of yellowness and redness
To combat yellowness and redness, special agrotechnical measures are taken.
They look like this.
- To change the alkaline environment to neutral, which is one of the first reasons for the appearance of yellowness on dill, you will need to acquire peat, sawdust, fresh manure, ammonium nitrate, iron sulfate or citric acid. Adding wood ash, dolomite flour, ground chalk, slaked lime and ground eggshells to the soil contributes to a decrease in acidity. The volume of added fertilizers directly depends on the dimensions of the garden plot and the deviation from the norm of the level of acidity.
- As soon as the first shoots sprout, you will need to thin out the dill well, so that there is a distance of two centimeters between the plants.
- In extremely dense soil, a small amount of sand will be required before planting. When planting dill, it is advisable to immediately start loosening the soil and mulching its top layer. This procedure will contribute to the enrichment of the soil with oxygen, useful vitamins and trace elements. Mulching helps maintain the required level of humidity and prevents water from evaporating quickly.
- It is recommended to take a responsible approach to such a process as watering dill. Soil moistening should be systematic, not chaotic. Watering is done only as needed. It is necessary to use only warm settled water.
- The use of fertilizer is not always appropriate.With good growth and development of the culture and maintaining a green tint, adding top dressing is not necessary at all. However, the pallor that occurs on the plant, which is unusual for the grown variety of dill, indicates that it is worth adding a nitrogen-containing fertilizer to the soil. These include: urea, mullein (solution), weeds (tincture), nettle, saltpeter, ammonia water and anhydrous ammonia solution. From fertilizers of organic origin, it is desirable to give preference to rotted manure and biological additives.
- In order to protect the plant from peronosporosis, the top of the dill and the soil are abundantly covered with substances such as wood ash and chalk powder. Provided that the infection has already occurred, it is recommended to use Planriz, Fitosporin-M and Bayleton.
- The initial stages of diseases such as fusarium and verticella wilt are accompanied by reddening of dill bushes and leaves. With the active spread of the disease, it is necessary to act quickly. First of all, it is recommended to treat all affected bushes with the specialized drug Previkur. It is already problematic to save a heavily affected bush, and therefore it is advisable to tear it out of the garden and throw it away so that the disease is not transmitted to adjacent plants.
- The use of insecticides to remove harmful insects from dill is strictly prohibited, as they have a harmful chemical composition. Such processing of the plant does not pass without a trace and can cause significant harm to the human body when eaten.
- To combat aphids, the use of the biological preparation "Fitoverma" is permissible.It is also recommended to spray the plant with mineral phosphorus and potash fertilizers (based on thirty grams of top dressing per ten liters of water). An excellent budget tool are various herbal tinctures and decoctions prepared independently at home. Give preference to nettle, tobacco, celandine, stems and leaves of tomatoes, chamomile, garlic leaves, onion peel, potato tops and yarrow.
- Soapy solution, which is sprayed with reddened dill leaves, does an excellent job with pests. To prepare it, one hundred grams of high-quality laundry soap is rubbed on a fine grater and diluted in ten liters of warm water.
As you know, any disease is much easier to prevent than to try to treat. In order to protect dill from possible diseases, it is necessary to follow agrotechnical recommendations and properly prepare the soil for planting. As a rule, yellowed and reddened dill can be saved, but you will have to react instantly.
It is advisable to remove severely affected bushes immediately so as not to provoke the spread of the disease to adjacent plants.
For information on how to grow dill, see the following video.