Many friends, especially novice friends, will encounter the problem of yellow leaves when they are breeding Guanyinzhu. What is the cause? Next, I will answer this question for you.
Cause analysis and treatment methods: 1. Environmental mutation causes yellow leaves of Guanyinzhu: environmental mutation includes discomfort to soil environment. Guanyinzhu likes loam with fertile, loose and well drained soil, poor drainage, and non fertile soil will cause yellow leaves.
Solution: the best soil is loose, fertile, well drained sandy loam, which can be mixed with farmland soil, red yellow soil, humus and fine sand.
2. Too much water causes the leaves of Guanyin bamboo to turn yellow (yellowish): the old leaves have no change, while the young leaves are dull and dark yellow, the new shoots are not long, and the branches are yellow, green and small. When this happens, it shows that we have too much water.
Solution: it should be placed in a cool and ventilated place, and then it should be put back into the basin.
3. The long-term water shortage causes the leaves of Guanyinzhu to turn yellow (dry yellow): the leaves at the tip or edge of the leaves are dry and dry. The yellow of the water deficient leaves is different from that of the water rich ones. The old leaves are withered and yellow from top to bottom, while the new leaves are normal.
Solution: when watering, pay attention to pouring enough and pouring thoroughly.
4. The leaves of Guanyin bamboo turn yellow (burn yellow) due to exposure to the sun: the tip and edge of the leaves are also withered, and yellow spots appear in the sunrise part of the leaves, which is caused by long-term exposure to the sun.
Solution: move it to the shade. Avoid direct sunlight.
5. Air drying causes the leaves to turn yellow: Guanyinzhu likes humid environment, and air drying will cause the leaves to turn yellow.
Solution: spray water properly to increase air humidity and prevent dry leaves from turning yellow.
6. The phenomenon is that the leaves of the whole plant turn yellow and fall off one after another. This is because the leaves can't get enough sunlight for a long time, so that chlorophyll can't form and stay in the hidden environment for a long time.
Solution: light needs to be added to avoid the disease.
7. Excessive fertilization of Guanyin bamboo results in yellowing of leaves (fat yellow): This is caused by excessive or excessive fertilization concentration. This phenomenon is that the new leaf tip appears dry brown, usually the leaf surface is fat and unevenness is not stretch, the old leaves are scorched yellow and fall off.
Solution: stop fertilizing immediately. If it is too serious, we can clean it with plenty of water
8. The long-term lack of fertilizer in Guanyin bamboo results in the yellow leaves (lack of fertilizer yellow): the color of the young leaves becomes light, yellow or light green, while the old leaves are more normal or gradually turn from green to yellow.
Solution: check the basin soil, if there is any dry phenomenon, change the soil, apply thin fertilizer frequently and timely pour some alum water (Guanyinzhu is the fertilizer mainly applied by nitrogen fertilizer for foliage plants).
9. Diseases and insect pests cause the leaves of Guanyin bamboo to turn yellow: the main diseases and insect pests of Guanyin bamboo are scale insects, which are easy to occur in high temperature and wet weather. The main damage is yellow leaves.
Solution: spray once every 7-10 days, 2-3 times continuously. We can use 40% Omethoate 1000 times, or 50% malathion 1500 times, or 255 imipenem 1000 times, or 50% dichlorvos 1000 times, or 2.5% deltamethrin 3000 times.
Guanyinzhu leaves
Hydroponic Guanyinzhu 1. Peel the leaves. Before entering the bottle, the leaves from the base of the cuttings to the mouth of the bottle should be peeled clean, not to mention the leaves should be removed or cut off, but also the leaves attached to the stem should be peeled off, until the circles of bamboo nodes are exposed and the green and yellow skin can be seen, so that the stem won't feel slippery and the water won't It stinks easily. After peeling the leaves, use a sharp knife to cut the base into bevels. The incision should be smooth to absorb water and nutrients.
2. Water. I use pure water to raise Guanyinzhu, which may be one of the reasons why it can grow green without putting a rusty nail or adding nutrient solution. When you just buy it and plug it in, don't move or change the direction within one day. Change the water every 3-4 days, and the silvery white fibrous roots will grow in about 15 days. It is not suitable to change water after rooting, and water can only be added in time after water evaporation is reduced. Frequent water exchange is easy to cause withering of leaves and yellow branches.
3. Depth of discharge. Do not put the water too deep, so as not to grow too much, as long as 1 / 2 or 3 / 5 of the vase height is enough (use transparent vase for construction, so as to observe the growth of roots and know the height of water).
4. Placement. Don't put the Guanyinzhu where the air conditioner often blows, it will make the leaves turn yellow.
(PS: the method of obtaining hydroponic materials should be potted and root washed. The root texture is relatively hard, and it is not easy to rot after hydroponics, but the germination of new roots is slow, the more it takes a month and a half.)
The experience of Guanyinzhu water culture and conservation: the key points of soil borne conservation
Dripping Guanyin drops water along the leaves, which makes many people think that dripping Guanyin must like "drinking water", but in fact, dripping Guanyin is not always "thirsty", just water once a week. Pay attention not to spray water on the leaves of Dishui Guanyin. The water in the north is very alkaline. Spraying water will cause white spots on the leaves.
Key points of hydroponic maintenance
1: It is easy to produce yellow leaves when the sun is too weak, and parasite when the air is not good.
2: During the growth period, water should be sprayed on the leaves frequently. Guanyinzhu is one of the traditional shade plants in China. It has a long history of cultivation and is loved by people. Because it is often planted near the temple, it is like the patron saint of the temple, so people call it Guanyin palm bamboo. Guanyinzhu is regarded as a kind of auspicious plant in the folk, which can dispel evil spirits and keep the house safe. People often plant it in front of the house, behind the house and in the courtyard. In geomancy, palm bamboo is also a "lucky thing". It can be planted and placed on the balcony to ward off evil spirits and keep the room safe.
2、 Guanyinzhu has a strong role in flourishing, and the balcony plants on Fengshui are tall and strong. The thicker the plants are, the greener the plants are. Guanyinzhu is a typical example. Put it at the door, I believe that wealth will come without invitation. Guanyinzhu is a plant to protect the house and ward off evil spirits. If you think that your family is always sick, your work is always not smooth, and your study is always backward, you should put a Guanyinzhu in front of the door, let Guanyinzhu drive away evil spirits, and return a happy home to you. Guanyinzhu is a kind of water-based plant. A house facing east at the gate can put a Guanyinzhu, which can improve the health of kidney and liver. In addition, Guanyinzhu has the meaning of exorcism and peace. Guanyin bamboo has more ornamental value than ordinary bamboo. Bamboo is also a symbol of a noble spirit. Placing a basin of Guanyin bamboo in your home can improve a person's taste.