What about the yellowing of Magnolia leaves? poor root growth is the main cause / attached solution.

The flowers and colors of purple magnolia are light and elegant, and the branches are green and elegant, so it is always green and vibrant in the pictures of purple magnolia trees, but sometimes we find that the leaves of the purple magnolia we plant will turn yellow and dry. What if the leaves of purple magnolia turn yellow? Let's take a look at the specific reasons and solutions.

What if the leaves of Magnolia turn yellow?

Botanists summed up years of breeding experience found that the main reasons for yellowing of Magnolia leaves are poor root growth, insufficient leaf photosynthesis, diseases and insect pests, so when encountered the problem of yellowing leaves of Magnolia magnolia, we should start with these three reasons.

1. Poor root growth

1. Too much water / poor drainage

When watering, if too much watering, and the drainage of the basin soil is very poor, it will cause the basin soil sometimes dry and sometimes wet, so that the root system of Magnolia can not bear, resulting in poor growth, resulting in yellowing leaves.

Solution: check whether the drainage of the basin soil is good, if the drainage is poor, you should change the soil in time, not too much when watering.

2. Too much waterlogging

Pay attention to drainage and waterlogging prevention during the rainy season. If the basin soil is waterlogged too much for a long time, the root system will blacken and rot, resulting in root rot. As a result, the root system will lose its vitality. When the root is unable to absorb nutrients, the leaves will turn yellow.

Solution: during the rainy season, trenches should be dug for drainage, and potted magnolia can be moved indoors to prevent Rain Water from soaking the roots for too long.

Second, lack of photosynthesis

The key factor of photosynthesis in the leaves of plants is that photosynthesis can be carried out normally if there is enough light, but when there is a lack of light, photosynthesis will be limited, thus making the leaves less green.

Solution: how to do the yellowing of Magnolia leaves caused by photosynthesis? The answer is to increase the light, the best position is to be able to accept a certain amount of sunlight, can not be placed in a too dark place.

III. Diseases and insect pests

Diseases and pests have a great impact on Magnolia magnolia. Many pests feed on mesophyll or juice. When the juice is absorbed, the leaves will yellowing, and in serious cases, it will cause plant death.

Solution: diseases and insect pests need to be prevented in advance, strengthen management in accordance with the breeding methods and matters needing attention of Magnolia, and treat diseases and insect pests in time to avoid spread.

What about the growing insects of Magnolia Magnolia? pest control / fertilization is the key.

The cold tolerance of Magnolia is very good, so it has fewer diseases and insect pests, but if the cultivation of Magnolia is completely wrong, or if the environment is too bad, it will cause pests and disease spots to harm Magnolia. What about Magnolia magnolia? Let's take a look at the pest control of Magnolia.

Pest control of Magnolia mandshurica

Diseases of Magnolia mandshurica

1. Yellowing of Magnolia

Main symptoms: the leaves of Magnolia Magnolia gradually change from green to yellow, the chlorophyll decreases gradually due to pathological changes, the leaves turn yellow at first and then turn white gradually, the growth of the plant is slow, and in serious cases, it may lead to plant death. it is one of the most harmful diseases in the prevention and control of diseases and insect pests of Magnolia.

Etiology: chlorosis is generally caused by bacteria, viruses, nematodes, etc., and can also be caused by insufficient nutrients, such as nitrogen deficiency, sulfur deficiency, drought, etc.

Prevention and control measures: strengthen cultivation management, pay attention to reasonable fertilization, timely watering, etc.; check the soil before planting, if the quality is too poor, should be improved by fertilization and other measures. In addition, 0.1% ferrous sulfate solution can be used for blade spray to prevent.

2. Anthracnose of Magnolia

Main symptoms: nearly round or irregular disease spots appear on the leaves of Magnolia Magnolia, often on the leaf edge, with a diameter of 10-20 mm. The disease spots are gray at first, the edges are dark brown, and then there are dense black dots.

Causes: high temperature, poor ventilation, less fertilization and watering, leaves infected by microsporum, black spots are bacteria.

Prevention and control measures: ① should pay attention to reasonable maintenance, such as scientific fertilization, watering, keeping the environment ventilated to avoid excessive ambient temperature; ② found diseased plants and sprayed 50% topazine wettable powder 500-600 times in time. Or 50% carbendazim 500-600 times solution, or 1 2ju 150-200 times Bordeaux solution, or 50% carbendazim 800 times solution.

Second, purple magnolia pest

1. Red spider

Red spider is one of the most harmful pests in the pest control of Magnolia Magnolia. After spreading its leaves, it will transfer to the leaves, starting from both sides of the main veins on the back of the leaves, with leaves as the main source of food.

Control measures: when ① finds that the color of the leaves is wrong, it should carefully check the back of the leaves, and if a small number of pests appear, remove the diseased leaves as soon as possible; ② uses 40% dicofol EC 1000mm 1500 times, 20% chlorpromazine wettable powder 2000 times to spray to remove pests.

2. Frost moth

The frost moth usually forages in the early morning, but lurks in the shade during the day, feeding on the epidermis of Magnolia leaves, and then the whole leaf may be eaten up, not only the growth of the plant will be hindered, but the flowering will be reduced.

Control measures: ① regularly turn the soil, can kill the overwintering pupae; when the frost moth is more serious in ②, it can be sprayed with 20% rice full suspension agent 1500 to 2000 times, 50% zinc parathion 2500 times, and 80% dichlorvos EC 800 to 1000 times.

What is the purple magnolia flower language, how long is the flowering period of purple magnolia / with more flowering skills

Because the purple magnolia is colorful and beautiful, so it is often used to watch or give to friends, so what does purple magnolia represent when giving it to friends? What is the purple magnolia language? How long does the purple magnolia bloom? With these questions, let's find the answers.

What is the purple magnolia language?

At the bottom of the valley in China, Magnolia is a very valuable flower, which is mainly used to watch flowers, so what is the language of Magnolia? The answer is: "fragrant feelings, handsome manners", because it is famous for its elegant fragrance and graceful posture.

What does purple magnolia stand for?

Purple magnolia means to appreciate each other, because when it is budding, it looks like a straight brush. If you give purple magnolia to each other, it means to praise each other's talent and express appreciation.

How long is the flowering period of Magnolia?

Botanists have found that the flowering time of Magnolia is usually in spring, that is, from March to April, and the flowering time is greatly affected by the temperature. For example, Magnolia Magnolia cultivated in a greenhouse may blossom in March, while open-field cultivation will blossom in April.

How do purple magnolia blossom

1. Rational fertilization

The number of flower buds is directly related to the number of purple magnolia flower branches. the more flower branches, the more buds may be, and the more flowers will bloom, which requires reasonable fertilization, such as applying compound fertilizer every 10 days before flowering. It can promote the growth of flower buds. Please refer to the detailed introduction of how to apply fertilizer to Magnolia.

2. Scientific pruning

Many plants need to keep the plant shape beautiful at ordinary times, but purple magnolia is not the case. Too much pruning will cut off some flower branches, so the pruning method of purple magnolia is particularly important. Generally, branches that are more than 15cm long and too dense need to be cut off after flower shedding, but do not need to be cut as they grow.

3. Control light and temperature

As we mentioned earlier, the flowering of Magnolia is mainly affected by temperature, so controlling the temperature at 15-20 degrees can make it blossom more. In addition, there should be plenty of light, and the best place to plant is sunny base fertilizer. In a semi-shady environment, it will have few flowers, and if it is too dark, it may not blossom.