What about the yellowing of marigold leaves? precautions / shade for yellowing marigold leaves

Marigold is a kind of flower with high ornamental value, which can be seen in many gardens in our country, but if the leaves of this plant turn yellow, it will still affect its overall aesthetic feeling. What about the yellowing of marigold leaves? Next, the editor will take you to learn about it.

What if the leaves of marigold turn yellow?

If you want to know what to do about the yellowing of marigold leaves, first of all, we need to know what causes this phenomenon. there are many reasons for this phenomenon, such as underwatering and long-term exposure, which may lead to the yellowing of marigold leaves. There are detailed reasons and solutions below. Let's take a look at it.

1. Soil problem

In the process of marigold culture, the choice of soil is very important. If you choose highly viscous soil to cultivate marigold, it will be difficult for marigold to absorb nutrients, resulting in insufficient nutrients and yellowing leaves.

Note: in terms of soil, it is best to choose sandy soil with high porosity, which has high drainage and air permeability, which can make marigold better absorb nutrients and thus thrive.

two。 Insufficient watering

Water is an important nutrient in the process of plant growth, and marigold is no exception. If too little watering will lead to the yellowing of marigold leaves due to lack of nutrients, we need to increase the frequency of watering.

Note: when watering marigold, the amount of water in each season is different, specific watering frequency and watering method you can refer to how to water marigold, in which there is a detailed introduction.

3. Long-term exposure

Marigold is a kind of light-loving plant, which needs sufficient light in the process of growth, but it also depends on the situation. If you leave it outside to receive direct sunlight when the summer sunshine is too strong, it is easy to burn plants and cause marigold leaves to turn yellow.

Note: the climate is more suitable in spring and autumn, we can let marigold receive light all day, but summer is the season with the strongest sunshine of the year, at this time we need shade, it is best to move marigold to indoor semi-shade to breed, so that it can not only receive light, but also not yellowing because the light is too strong.

4. Occurrence of diseases and insect pests

When raising marigolds, diseases and insect pests are easy to occur if they are not properly maintained, and this phenomenon is also one of the main reasons for the yellowing of marigold leaves, so we must be careful when raising marigolds.

Note: in the occurrence of diseases and insect pests, must be dealt with in time, if the event is prolonged, it will not only be the problem of yellowing leaves, but also lead to the whole plant withered. When leaving the warehouse, we can refer to the article on pest control of marigold, in which there are all kinds of pest control methods, which you can understand.

What about marigold worms? pest control of marigold / 3 insect pests and 2 diseases

In the process of cultivating marigold, what people are most afraid of is diseases and insect pests. This phenomenon will not only make marigold leaves yellowing, but also gradually wither it, so what about marigold worms? What do you need to do to control diseases and insect pests of marigold? Next, the editor will take you to learn about it.

What to do with marigold worms / chemical spraying

If we want to know what to do with marigold worms, we first need to understand what kind of insects they grow, so that we can be targeted except that the most direct way to deal with this situation is to use pesticides to kill them. however, the chemicals used by each kind of diseases and insect pests are different, which is described in detail below, and we will move on.

II. Pest control of marigold

Insect pests of marigold

1. Diamondback moth pest

The shape of this pest is similar to that of moths, but its size is relatively small. this pest mainly feeds on the leaves of marigold and gradually eats away at the leaves of marigold, resulting in many holes in the leaves of marigold, which greatly affects its beauty. in serious cases, it will cause marigold to become a smooth rod.

Control method: in the control of this pest, we can choose to use 2.5% fenvalerate EC 1500 times to directly spray.

two。 Shell pest

In the pest control of marigold, the shell insect is a common pest. This pest mainly harms the leaves of marigold, and it will gradually absorb the juice in the leaves, resulting in the yellowing and shedding of plants due to the loss of nutrients.

Prevention and control methods: for this pest, we must control it at the initial stage. If the event is prolonged, it will cause great loss to the plant. We can use 2000 times of imidacloprid wettable powder to spray and kill.

3. Aphid pest

Aphids are a pest that occurs in many plants, and marigold is no exception. this pest mainly harms the branches and leaves of marigold, and gradually absorbs the juice, which leads to the death of marigold due to the loss of nutrients.

Control method: when dealing with aphids, we must use 2000 times of imidacloprid wettable powder in time to spray.

Diseases of marigold

1. Powdered powder disease

In the pest control of marigold, powdery mildew is a common disease. when this disease occurs, some powdery mildew layer appears on the leaves of marigold, which will gradually spread to the whole leaf, which makes marigold unable to carry out photosynthesis, resulting in premature senescence and other phenomena.

Control method: in the prevention and control of this disease, we can use 80% sulfur 400 times plus 72% benzothiourea cyanide 600 times spray to spray the plant.

two。 Black spot disease

Black spot disease has a wide range of hazards, at first, there will be many purple-brown spots on the leaves, with the passage of time, the spot will gradually spread to the whole plant, and the color of the spot will gradually change to black, resulting in plant decay and death.

Control methods: in the prevention and control of this disease, we can use methyl topiramate to spray the diseased plants, usually once every 7-12 days, and can be basically cured after 2-3 times.

What to do if the green apple leaves turn yellow? what are the methods?

Green pineapple is an evergreen foliage potted plant that purifies the environment, which is not only effective and effective, but also very easy to breed; it is deeply loved by the majority of consumers. But there are also many green pineapple farmers in the purchase home breeding for a period of time, encountered the most common and thorniest problem-the green pineapple leaves turn yellow! Watching the beloved green apple turn yellow day by day, the owners are distressed, anxious and helpless. Then what is the reason why the green apple turns yellow? What are we going to do? We have to find a way to save it! Let's find a way to solve this thorny problem.

First, to analyze the causes of leaf yellowing, generally speaking, what can cause green apple leaves to turn yellow is only related to moisture, sunlight, temperature, nutrition (fertilizer), and other reasons, but the probability is very small, almost none. The following editor provides you with some of the main causes and symptoms that will make green pineapple leaves yellowing. Parents can compare their green pineapple symptoms and find out the causes in order to better solve the problem of yellowing leaves! [improper watering, leaf yellowing] improper watering often appears on the new owners of green pineapple for the first time. Because they care so much that they don't drink enough water, they try their best to give it water. As a result, the leaves of the poor green pineapple slowly become dark and dull. What is more pitiful is that the roots are slowly rotten, and the ends of the new leaves that have just grown are not long. Or simply do not give others to drink water, so that the tips and edges of green radish leaves begin to wither, dry, or even wither and fall off.

If the green pineapple is not exposed to sunlight for a long time and cannot be properly ventilated in the corner, it is unable to promote its photosynthesis and oxygen absorption, it is easy to yellowing due to the lack of chlorophyll. Even new leaves will show symptoms of yellowing.

[the light is too strong, the leaves are yellow] the green pineapple is a shade-loving plant, and the direct light is a deadly killer for it. It will soon wilt and wither or turn yellow and fall off, especially the sunrise part will not only appear macula, but even directly kill it.

[improper fertilization, yellowing or shedding of roots and leaves] fertilization is as appropriate and appropriate as watering. Too much will make its excess nutrition, concentration increases, it will accumulate, resulting in green radish leaves hypertrophy and no luster, light yellowing, heavy shedding. On the contrary, too little, the leaf color of green pineapple will gradually fade, showing light green or yellow blocks, and slowly from the bottom up, from the roots of the leaves begin to yellow, fall off.

[temperature change] the temperature in summer and winter is different, so we should also pay attention to dry heat, because dry heat can also cause green leaves to turn yellow. [environmental adaptation] just started to plant green pineapple, green pineapple needs about 30 days to adapt to the new environment, during this period, some old leaves will show signs of yellowing, but this is a very normal phenomenon, is the running-in period between green pineapple and environment. At this time, we do not need to be in too much of a hurry to take measures, after a period of time, the green apple will naturally return to normal, gradually exuberant.

Second, the solution according to the analysis of the causes of yellowing, after finding the causes of yellowing, then one-to-one solution and proper debugging according to the main causes, which not only saves our time, but also enables us to quickly give the correct solution. first of all, we carry out one-to-one treatment according to the disease. [improper watering] if we water too much, we will stop watering in time, loosen the soil appropriately, increase the soil to make it less wet, or simply change the soil and replant it. On the contrary, if you water too little, water it in time, pay attention to step by step, not too much at a time. [lack of light or excessive light] if the light is too strong, we need to put the green apple in a cool and bright place and water it properly. If the light is too dark, we need to put the green apple in a cool place with enough light. Take timely measures to make up the light.

[improper fertilization] if it is found that the leaves turn yellow due to excessive fertilization, the times or amount of fertilization should be reduced as far as possible, and the method of pouring clear water should be used to dilute the fertilizer in the soil and reduce its concentration. You can also reduce fertilizer by washing. If it is because of too little fertilization, it is necessary to apply fertilizer as many times as possible, and replenish enough fertilizer and nutrients for green pineapple in time. If it is too serious, consider whether to change the pot soil. [other methods] Green pineapple is also a very fertile plant, we can also adopt cutting propagation when necessary, as long as we take a leaf bud on the root to plant can grow quickly and normally. Therefore, when the green pineapple is seriously yellowed, the root position is removed, the yellow leaves are removed and the cuttings are reproduced. In addition, when it is hot and dry due to the change of temperature, it is necessary to open the window for ventilation and water more to ensure nutrition. In a word, there are many ways to solve the problem, and different measures should be taken according to the different circumstances.

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