Sihai network

How does Mo LAN leaf turn yellow to do? Cause analysis and solution of yellow leaves of Cymbidium si

Cymbidium is a very popular potted plant, which not only has ornamental value, but also can purify the environment. However, many people often have yellow leaves when maintaining Cymbidium. In fact, this is caused by improper maintenance and management. The following editor analyzes in detail the reasons for yellow leaves of Cymbidium and how to maintain it correctly.

The reason analysis and solution of the yellow leaves of Cymbidium Cymbidium are as follows: 1. Excessive watering; when watering Cymbidium Cymbidium, we must pay attention to not pouring too much water all at once, and the water can not be absorbed immediately in the soil, which will easily lead to the root rot, root rot, and the leaves of Cymbidium Cymbidium will slowly turn yellow, even the whole plant will die. And the watering method should be proper. Many times, when we are watering plants, we are always used to pouring water from the head of the plant, which is easy to make the water flow into the new leaf buds, and will cause the leaves to turn yellow or even rot roots.

The right way to do it: in summer and autumn, the leaves should be dry before sunset and at night. In the two season of winter and spring, water is best before and after sunrise, and spray increases air humidity to facilitate the growth of Cymbidium sinensis. When the surface of the substrate is dry, it needs to be watered as soon as possible, not too long. And the watering method should be correct, along the basin along the pouring is better.

2、 If the fertilizer is applied frequently for a long time, it will lead to excessive nutrition, and over time, it will also cause the leaves to turn yellow.

The right way: therefore, the fertilizer should be sprinkled moderately, not too much. Fertilize once a week in the growing season. The growth of Cymbidium sinense is slow in autumn and winter. Fertilize less once every 20 days. Spray a small amount of water after fertilizing to prevent the fertilizer from contaminating the leaves. Fertilization must be carried out in the evening on a sunny day, and there is a risk of rotten roots on a cloudy day.

3、 The temperature is too low; if it is winter, the leaves of Cymbidium are yellow, mostly because the temperature is too low, especially in the temperature below zero.

The right way: therefore, we should pay attention to the freezing of Mulan, and don't put it outdoors in winter. The suitable temperature for Cymbidium goeringii to grow slowly in winter is 10 ~ 30 ℃ or lower than that in summer.

4、 Insufficient light; too much light is easy to cause sunburn. Excessive shading or long-term indoor will affect the photosynthesis of orchids, resulting in yellow leaves, poor growth and difficult flowering.

The right way: appropriate more sunlight, especially before 9 am morning light on Orchid growth and flowering are very favorable. Shade in summer and spring, sunny days in winter and autumn should be 90% - 80%.

5、 Because of poor ventilation and high humidity, Cymbidium is prone to ink spot disease and mold disease. Pay attention to prevent disease in time. If the cymbidium is sick, it will also cause the leaves to turn yellow, and there are many diseases in the cymbidium,

The correct way is to remove the diseased plants, strengthen ventilation and reduce humidity, and use 65% zineb powder 600 times solution or 50% carbendazim 800 times solution to control the disease. Once every half month, three times in a row. When the humidity is high, scale insects often occur. Scale insects, commonly known as blue lice, are difficult to eradicate. It can be controlled by 500-800 times of 20% Omethoate EC.

6、 Environmental pollution: the leaves of Cymbidium sinense are long and thin, with many pores and large air contact area. If some families just put them in the place opposite the smoking machine and window, the leaves will also turn yellow seriously.

The right way to do it: Cymbidium needs clean air and pollution-free environment. Moran garden should avoid nearby factories and workshops that exhaust smoke and produce a lot of dust. Family cultivation should be as far away from smoke windows, range hoods and air conditioners.

The main points of conservation for flowering Cymbidium are as follows: 1. The soil is rich in humus, loose without adhesion, and often slightly acidic. It is an excellent potting soil for cultivating Cymbidium. In the northern cultivation of Cymbidium, it is generally made of 5 parts of rotten leaf soil and 1 part of sand and mud. It can also be mixed with 4 parts of humus soil, 2 parts of peat soil, 2 parts of slag and 2 parts of river sand.

2. The best water for Mulan is rain or snow water. If some people use tap water, it can be used only after a day's exposure.

3. The method of propagation of Cymbidium sinense can be divided into two parts. The best time for the division of Cymbidium sinense is in dormancy period, that is, the dormancy period before new buds are unearthed, before new roots grow, or after flowering. The separated orchid plants should be observed and the rotten roots and dead leaves should be cut off.

Potted Cymbidium

Summary: the above is the reason analysis and the correct solution that Xiaobian shared with you about the yellow leaves of Cymbidium Cymbidium. In fact, as long as you master a series of management points such as reasonable watering, improving environmental humidity, illumination and so on, you can make your family's Cymbidium grow healthily and healthily.