What is the yellow tip of the potted cypress

There are two ways in which the leaves of potted cypress trees turn yellow:

1. The temperature is low in winter, and the leaves of cypress trees will be a little yellow, which is not as green as the growing season. It's spring, it's the growing season, and soon there will be new green leaves, which are not pests or diseases.

2. Red spider damage Red spider is the main pest and disease of cypress, and once the cypress is damaged, it will be yellow and lifeless.

Spider mites multiply quickly and are very harmful, often causing plant death in a very short period of time. It should be killed very early, you can go to the flower store to buy acaricidal drugs, use according to the instructions, and generally control it within a week. However, it is difficult for the damaged leaves to turn green that year.

How to check for spider mites: Use a piece of white paper to hold on the lower part of the branches and leaves, pat the branches and leaves with the other hand, carefully observe the fine pieces falling from the tree, if you see small black dots moving on the paper, it is a spider mite, and you should take immediate measures to kill it according to the above method.

To prevent the occurrence of pests and diseases, you can spray potassium dihydrogen phosphate of fertile leaves to enhance resistance.

Hello, potted cypress leaves are yellowing.

Reason 1: Potted plants.

The development and growth space is limited, mainly reflected in the roots, and there is not enough space for development. We can repot the plant according to its growth rate and size to ensure enough soil and space for development.

Reason 2: It may be that the potted roots are deprived of oxygen in the soil due to excessive watering, so that the roots slowly rot under the soaking of water, and then cannot supply water and fertilizer to the stems and leaves, causing the leaves to turn yellow. When planting potted plants, try to choose pots with holes, which can ensure good ventilation, in addition, do not water too much, but also do not leave the plants in a dry environment, just in moderation.

Reason 3: Too much fertilizer, we usually use nitrogen fertilizer.

Or potassium fertilizer, fertilizer should be applied far away from the roots when fertilizing, otherwise burning the roots will cause the leaves to turn yellow, serious will cause plant death, and fertilization should be appropriate, it is recommended to use water-soluble fertilizer for sea meals, which has a quick effect and a long fertilizer effect.

Summary. 1. Increase nutrition: The harsh environment weakens the disease resistance of trees, and if the water and fertilizer are not timely, it will lead to various lesions, so it is necessary to supplement nutrition in time.

Nutrient solutions can be applied to the roots to strengthen the roots, and foliar fertilizers can be sprayed on the foliar surface to increase the nutrients of the pine trees, and new shoots can be produced as soon as possible, and be sure to water them in the spring. 2. Pharmaceutical prevention and control: after the lesion occurs, it is necessary to carry out pharmaceutical treatment in time.

Generally, the yellowing of pine trees and the fall of needles are all lesions caused by fungi, and they should be treated with broad-spectrum fungicides. For example: chlorothalonil, methyl tobuzin, thiophanate-methyl, carbendazim, etc.

3. Artificially raise the underground temperature: due to the extremely harsh climatic conditions, the ground temperature can not rise for a long time, at this time, the staff can dig a pit under the tree to artificially raise the underground temperature and help the pine tree to heat up.

1. Increase nutrition: The harsh environment weakens the disease resistance of trees, and if the water and fertilizer are not timely, it will lead to various lesions, so it is necessary to supplement nutrition in time. Nutrient solutions can be applied to the roots to strengthen the roots, and foliar fertilizers can be sprayed on the foliar surface to increase the nutrients of the pine trees, and new shoots can be produced as soon as possible, and be sure to water them in the spring.

2. Pharmaceutical prevention and control: after the lesion is born early and hail, it is necessary to carry out pharmaceutical treatment in time. Generally, the yellowing of pine trees and the falling needles are all lesions caused by fungi, and they should be treated with fungicides for broad-spectrum banquet stools.

For example: chlorothalonil, methyl tobuzin, thiophanate-methyl, carbendazim, etc. 3. Artificially raise the underground temperature

Due to the extremely bad climatic conditions of Lu Xiangfan, the ground temperature can not rise for a long time, at this time, the staff can dig a pit under the tree to artificially raise the underground temperature and help the pine tree to heat up.

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It is a pus-like mucus containing bacterial bodies that overflows from the diseased part of the disease, usually in the form of dewdrops, or scattered as a layer of bacterial fluid. Generally, it is in a place with insufficient light and poor ventilation for a long time, and it occurs more frequently when watering, which can be improved by improving the maintenance environment and reasonable management, without spraying for prevention.

The yellowing of juniper bonsai leaves is mostly caused by three factors, namely overwatering, lack of nutrients and insufficient light. If it is overwatered, the root system may have rotted, be careful to loosen the soil, evaporate the water as soon as possible, and watering can be carried out when it is dry and wet. If there is a lack of nutrients, it should be supplemented in time, and compound fertilizer can be applied.

If you don't get enough light, move to a well-lit place and rehydrate to recover.

1. Improper watering.

When overwatering juniper, it will cause it to turn yellow. When you water it too much water and do not drain the specified water in the pot in time, the root system of the juniper will be soaked and rotten, and then it will make its yellow leaves.

Solution: Drain the stagnant water in the plant pot, evaporate the excess water in a ventilated place, and replace the soil after pruning the roots of juniper if it is serious.

2. Insufficient nutrients.

Juniper needs sufficient nutrients to grow, and if it is not given the necessary nutrients for a long time, it will cause it to have yellow leaves. Lack of fertilizer will lead to insufficient nutrients such as nitrogen, phosphorus, and potassium needed for plant growth, so the leaves of the plant will wilt and yellow.

Solution: To fertilize juniper, you need to follow the principle of thin fertilizer and less fertilizer, apply multi-element compound fertilizer every two months, and pay attention to not applying thick fertilizer and raw fertilizer.

3. Insufficient light.

Juniper is a light-loving plant, and it cannot be kept in a dark and lightless place for a long time, which will lead to the hindrance of photosynthesis in the leaves, the chlorophyll content in the leaves is too low, and its evaporation cycle chain will also be affected, which will make the juniper yellow leaves.

Solution: Place the plant in a place with good light conditions for maintenance, give it plenty of light, but also pay attention to give it proper shade when the sun is too high in summer. In spring, autumn and winter, it should be placed outdoors to receive sunlight, and in the hot summer, when the light is too strong, it should be kept in a place with astigmatism.