What is the reason why the leaves of bluegrass are yellow and black?

If it is blackened, it means that the leaves contain more water, and they have been melted for a long time and have not been treated in time and blackened!

If it is yellow, it means that the plant is planted in the crystal mud, and the water is too high, that is, the plant planted in the crystal mud should be half water and half air, so as to facilitate the breathing of air (plants also need to breathe air like people); Or the plant has not yet adapted to grow in the crystal mud, has just come to the water from the land, and has not yet generated new roots that adapt to the water, so that it cannot provide the plant with sufficient nutrients, and the leaves are yellow!

Solution: 1. Put the root system of 2 3 of the plant in water, and the root system of 1 3 in the air.

2. Foliage plants are generally not allowed to be exposed to direct sunlight (especially direct light at noon), especially sensitive plants such as zebra evergreen, otherwise the leaves will be scorched! It is enough to put the plant in a place with scattered light! Just be in a brighter place, but not too dark!

3. Supplement plant nutrition in time, because crystal mud has no nutrients, which must be clear! You can spray foliar fertilizer or water a certain amount of liquid fertilizer once every half a month! However, this pouring method will turn the crystal mud green and black (produce a green bath).

Foliar fertilizer is recommended here!

The appearance of yellow leaves turning black, depending on the characteristics of its occurrence, bacterial infection has the following conditions:

One is water yellow. Caused by over-frequent watering, it is characterized by no obvious change in old leaves and yellowing of young leaves; This should be done with immediate water control;

The second is dry yellow. Caused by lack of water and drought, it is characterized by the first yellow leaves from the bottom up, if the lack of water for a long time, the whole plant will be yellow, and even die, should be watered in time;

The third is fat yellow. Caused by excessive fertilization or high concentration; It is characterized by thick, shiny, and uneven young leaves; Fertilizer, cultivation and watering should be controlled;

Fourth, hungry yellow. It is caused by insufficient fertilizer, low fertilizer concentration, and long fertilization interval; It is characterized by the first yellow of young leaves and young stems, and if you do not fertilize in time after seeing this phenomenon, it will also cause the whole plant yellow leaves or even die; For flowers lacking fertilizer, avoid applying a large amount of thick fertilizer at one time, so as not to cause root burning;

Fifth, iron deficiency yellow leaves. Due to the great change of soil fertility conditions, the phenomenon of yellow leaves often occurs in greenhouses, which is characterized by obvious young leaves, light old leaves, yellow mesophyll, green leaf veins, and the formation of a typical network. It can be solved by applying ferrous sulfate aqueous solution, and the method is: 7 parts of cake fertilizer, 5 parts of ferrous sulfate, 200 parts of water are poured into multiple liquids, or buy a pack of chlorothalonil spraying also has a certain curative effect.

The leaves of the orchid are yellow from the bottom to the top, but the root system is very good, so it turns out that it is suffering from this "disease".

Reasons for the blackening of bluegrass leaves:1. Dry air: If the orchid is in a dry environment, the leaf moisture imbalance is easy to blacken, so it is necessary to spray water frequently to increase humidity.

2. Watering too much: If you water it too much, it is easy to cause the leaves to turn black, so you need to stop watering as soon as possible and strengthen ventilation to evaporate water.

3. Improper fertilization: If the fertilizer with high concentration is applied, it will cause fertilizer damage, and it needs to be rinsed off with water as soon as possible.

4. Infected with diseases: Once the infected leaves are easy to turn black, prune the diseased leaves as soon as possible and spray fungicides.

It may be due to the presence of pests and diseases, or because of not watering and fertilizing in time, or because the soil is not fertile enough, or because it is not kept in sufficient light.

The main reason is that there is a lack of water, so this situation will occur, and secondly, it will be caused by the lack of nutrition, so you must pay attention when planting.

It is likely to be caused by improper watering, or it may be caused by insufficient light exposure, so be sure to take good care of the plants.

The blackening of its leaves is mostly caused by four reasons. First, the light is too strong and the sun hurts, so pay attention to the strong light and be sure to block it in time. Move the plant to a ventilated semi-shaded place and sprinkle it with water to help it recover.

The second is to be infected with a disease, to find out the specific disease as soon as possible, but also to spray. The third is excessive watering, the water will be rooted, and the leaves are easy to blacken, so the plant should be depotted as soon as possible, pruned and re-maintained. Fourth, the roots are burned due to improper fertilization, and the roots should be depotted and repaired if necessary.

What is the cause of the black leaves of orchids and what to do if the leaves are black.

1. The light is too strong Orchids are semi-negative plants and are afraid of the sun. If it is maintained under strong light during the management period, especially in the scorching sun in summer, it is easy to sunburn the plant, and the leaves will turn black and yellow. In this case, the black leaves should be cut off as soon as possible, and then moved to a ventilated semi-shaded place, sprinkled with appropriate amount of water to help the plant cool down, and slowly recover.

2. Infection disease If the environment provided by the usual environment is not suitable for infection, it is easy to be infected with disease, once the infection is not treated in time, the leaves will have black spots, which will slowly expand, and the whole leaf will become black. It is necessary to find out the specific infection disease as soon as possible and spray it for treatment. In addition, maintenance methods need to be changed to provide a conducive environment for growth, so that the plants can recover.

3. Overwatering Orchids are not tolerant to waterlogging. If you water too often, the soil will be waterlogged, and the roots will rot after a long time, and the leaves will be easy to turn black and yellow. In this case, the plant should be depotted as soon as possible, the rotten roots and black leaves should be cut off, disinfected and replanted.

Orchid Fourth, improper fertilization It needs nutrients during the growth period, and it should be fertilized scientifically. If the concentration of fertilizer applied will burn the roots, the leaves will also be easy to blacken. To change the fertilization method, apply a low concentration of fertilizer.

In addition, if the situation is serious, it is necessary to remove pots, prune roots, change soil, and re-manage.

Orchids are elegant and beautiful, and the main reasons for the blackening of the leaves are due to improper watering, excessive fertilization, too low air humidity, infection with germs, etc., so it is necessary to check the causes caused by specific signs and carry out symptomatic conditioning. When cultivating orchids, watering and fertilizing should be appropriate. In addition, it is necessary to control the temperature and prevent the occurrence of bacterial infection.

1.Watering. Orchids are plants that like moisture and have high requirements for the soil.

In order to keep the soil moist, watering must be in moderation, if the watering is insufficient and the soil is too dry, it will cause damage to the root system of the orchid, which will cause dry leaf tips and black leaves. In addition, if you water too much, it will cause stagnant water, which will cause damage to the root system and leaf tips of the orchid, causing the leaves to turn black. So be sure to pay attention to proper watering to promote its healthy growth.

2.Excessive fertilization.

In the process of orchid breeding, we must pay attention to fertilization on time, if too much fertilization, it will make its roots unable to absorb too much nutrients, and the leaves will be dry and sharp, black. Therefore, it is necessary to pay attention to the fact that when the leaves are blackened, the amount of fertilizer should be reduced, and the orchids can be better cultivated according to the principle of thin fertilizer and frequent application.

3.The air humidity is too low.

Another reason why orchid leaves turn black is because of the low humidity of the air, especially in winter, when the tips of the leaves of orchids turn black. This is caused by the imbalance of moisture in the orchid leaves due to insufficient air humidity.

4.Infection with germs.

Infection with germs can also cause the leaves of orchids to turn black, so we must pay attention to disease prevention and control when breeding. If the leaves are blackened due to infection and are not controlled in time, it will affect the healthy growth of orchids.