How to avoid yellow leaves, four ways to avoid yellow leaves do not bloom

Although there are not many leaves in Zhu Dinghong, and people do not plant it to watch the leaves, some flower friends encounter the situation of yellowing leaves, which is not only a headache but also affects plant growth and flowering, so what about the yellowing of red leaves? Let's take a look at the specific reasons and solutions.

What if Zhu Dinghong leaves turn yellow?

1. Natural yellowing

Even if Zhu Dinghong's culture method is correct, there will be the phenomenon of old leaves turning yellow, which is a process that leaves will inevitably go through, because when the leaves undergo normal metabolism, the leaves will turn yellow after 3-5 years, which is a normal phenomenon. Just cut off the yellowing leaves.

2. Overwatering

In the process of planting Zhu Dinghong, watering is very important, but if you water too much, it will cause the leaves to turn yellow, because the roots are always in too wet soil, there will be rotten roots, so watering must not be too frequent.

3. Sun exposure

In spring and autumn, scarlet can be preserved in the sun when the sun is not too strong, but be sure to move back to a bright place in summer. If the sun is exposed to the sun, it will burn the leaves and eventually cause the leaves to turn yellow.

4. Diseases and insect pests

There are a lot of diseases and insect pests will cause leaves to turn yellow, such as leaf spot, leaf blight and so on, this situation leads to red leaves yellow how to do? The answer is to use chemicals for prevention and control, and pay attention to the usual maintenance and environmental hygiene.

How to maintain Zhu Dinghong in autumn

1. Control watering

The temperature will gradually decrease in autumn, so Zhu Dinghong's demand for water will gradually decrease, so watering will gradually decrease. If you water too much, it will not only cause the leaves to turn yellow, but also prevent Zhu Dinghong from entering the dormant period, affecting the flowering of the following year.

2. Scientific fertilization

When applying fertilizer in autumn, you should apply rotten organic fertilizer as far as possible, and don't let the fertilizer concentration be too thick when applying fertilizer. In addition, don't apply too much nitrogen fertilizer, not just phosphorus and potassium fertilizer, but pay attention to the balance of nutrition.

3. Pay attention to heat preservation

At the end of autumn, the temperature may drop below 10 degrees, at this time must be kept warm, but do not let the temperature too high, so that Zhu Dinghong can smoothly enter the dormancy period, will not be too low temperature and frost damage.

What if the leaves of Zhu Dinghong turn yellow? Causes of yellowing of leaves of Zhu Dinghong

What if the leaves of Zhu Dinghong turn yellow? Because of many different varieties, Zhu Dinghong is widely potted and has high ornamental value. But recently, many friends said that I do not know how Zhu Dinghong appeared the phenomenon of leaf yellowing, and I do not know what to do.

Under normal circumstances, the leaves of Zhu Dinghong are green and shiny. If they are not properly maintained, the leaves will yellowing. The reasons are:

① drains poorly or is too wet. Zhu Dinghong likes to be wet, but avoids being too wet and afraid of waterlogging. Whether potted or planted in the open field, the leaves will turn yellow when the substrate is poorly drained.

The ② light is too strong. Zhu Dinghong likes light, but the light should not be too strong, such as hot summer in the hot sun, will cause leaf tip scorch, leaves yellow. Therefore, in the height of summer should be placed in the sun is not too strong or take appropriate shade.

Improper fertilization of ③. When the fertilizer is too thick or not fully mature organic fertilizer, especially in the summer high temperature, it will cause fertilizer damage and make the leaves yellow.

④ disease. When suffering from leaf spot disease and leaf blight, it will also make the leaves yellow.

How to make Zhu Dinghong avoid yellowing:

Zhu Dinghong blossoms first and then grows leaves. If cultivated properly, it can produce flowers with short, thick leaves, large and colorful flowers, and great ornamental value. The specific cultivation methods are as follows: after digging up the mother ball every autumn, separate the balls around the mother ball, cut and dry the old roots according to their size, and store them in a ventilated and dry place with bamboo baskets or cloth bags for the winter. During dormancy, it is necessary to check frequently to prevent mildew and rot. From March to early April of the following year, small balls are planted in the open field. Large balls of more than 5 cm are selected and planted in an earthen bowl with a caliber of 8 cm. The basin soil can be mixed with 3 portions of pig manure, 2 parts of sawdust, 2 parts of honeycomb cinder and 3 parts of garden soil. When planting, the bulb will be exposed to the soil surface about 1 beat 2 or 1 beat 3. After planting, pour water thoroughly and put it in a half-shaded place. Move to a sunny place after 7 days to keep the basin soil moist. After half a month of planting, you can use clear water dung and a small amount of urea (bean cake liquid is better). After the bud is formed, add a small amount of potassium dihydrogen phosphate with fishy water and apply it once every 7 to 10 days. 0.3% potassium dihydrogen phosphate and 0.2% urea can also be sprayed outside the root to make the flowers bright.

Presumably through the introduction of the above editor, we should have a certain understanding of the yellowing phenomenon of Zhu Dinghong, and only by doing a good job of management can we better avoid the yellowing phenomenon of Zhu Dinghong.

What about the red worms? prevention and control measures of diseases and insect pests / environmental hygiene is very important.

The harm of diseases and insect pests to any plant is huge, and Zhu Dinghong is of course no exception. Although Zhu Dinghong has strong adaptability, it is inevitable that there will be pests and diseases, so what should we do when the red worms grow? Let's take a look at the prevention and control of diseases and insect pests in Zhu Dinghong.

What about the red worms?

1. White powder medium

There are many reasons for the emergence of white powder in Zhu Dinghong, such as temperature, light, wind, Rain Water and so on, such as too high temperature, low humidity and so on.

[control measures]: during the dormant period, 3 ~ 5.5 °B é stone sulfur mixture can be sprayed, which can play a good role in preventing white powder; insect pests can be sprayed and scale must be treated, etc., in addition, pay attention to environmental hygiene, do not let the temperature too high.

2. Aphids

Aphids usually appear on the buds of Zhu Dinghong. They use mouthparts to pierce the tissue of the buds to suck up juice and leave black spots on the buds, causing the leaves to yellowing and falling off and the buds unable to bloom.

[control methods]: 40% of dimethoate or 1500 times of omethoate can be sprayed, or 3000 times of fenvalerate can be sandblasted, sandblasting once a week, usually 2-3 times, aphids can be removed.

Prevention and control of diseases and insect pests of Zhu Dinghong

1. Nematode disease

[symptoms]: the leaves and flower stems of Zhu Dinghong first fall ill, and then occur to the base. For example, bulbs will also be affected. Nematode disease will lead to withered leaves, hindered root growth and, in serious cases, lead to Zhu Dinghong's death.

[control method]: soak the fresh stem with 43 ℃ warm water and 0.5% formalin for 3 hours. If the disease is more serious, it can be sprayed with 1000 times of triclofenac EC.

2. Spot disease

[symptoms]: round reddish-brown spots appear on leaves, flowers and bulbs, which occur most in autumn, and it is one of the most harmful diseases in the prevention and control of red diseases and insect pests.

[control methods]: disinfect the roots before planting, such as soaking in 0.5% formalin solution for 2 hours, and pay attention to reasonable fertilization, which can improve the resistance of Zhu Dinghong to spot disease.

3. Erythema

[symptoms]: purple-brown spots appear on the tip and edge of the leaf, the edge of the leaf will also rise and appear obvious lines, the disease site will be sunken, and the leaves will turn yellow and gray gradually.

[prevention and control]: remove the diseased leaves quickly and burn them centrally. Spray carbendazim 800 times solution to the plant, pay attention to the ventilation of the environment.

4. Verticillium wilt

[symptoms]: the disease usually occurs about a month after planting, first the lower half of the leaves wilt, then roll up, and then the disease changes from yellow to yellow, and finally the upper leaves will wither and die.

[control methods]: before planting, disinfect the soil and plant roots, in the process of fertilization, do not only apply nitrogen fertilizer, potassium fertilizer can improve the resistance of Zhu Dinghong to the disease, so we should pay attention to the nutritional balance of fertilizer.