What should I do if the pine and cypress needles are yellow and black, and can I save the yellow and

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 diseases.

occurs, therefore, timely replenishment of nutrition. 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.

Thioamphanate-methyl, carbendazim.

Wait. 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. Hope.

After transplanting, the yellowing of pine leaves is not vigorous, generally iron deficiency, generally using foliar fertilization, pine leaves yellowing and iron deficiency in serious areas, must be combined with soil iron fertilizer.

Commonly used iron fertilizers include ferrous sulfate, ammonium ferrous sulfate, ammonium ferrous sulfate, and synthetic complexed iron such as ferric citrate, EDTA-FE and EDDHA-FE, etc., in most cases, the effect of soil application is not obvious, mainly because iron will quickly convert into insoluble oxides.

In order to improve the effect of iron fertilizer, iron fertilizer can be mixed with organic fertilizer, and strip application or hole application can be used.

EDDHA-Fe is very stable, and the iron supplementation effect of soil, especially alkaline soil, is significant. Spraying iron fertilizer also has the disadvantages of easy oxidation, coupled with the small mobility of iron in plants, it is best to use chelated iron fertilizer such as EDTA-Fe and spray it multiple times to effectively control iron deficiency.

There is also a possibility that due to the influence of temperature, in early spring, the aboveground temperature is high, the underground temperature is low, the aboveground part begins to grow, and the underground part is delayed by the temperature to absorb water and nutrients from the soil, resulting in nutrient deficiency, and the plant turns to and regulates the internal environment through its own signals. Decomposes chlorophyll** growth center nutrients in leaves. That is, at this time, the nutrients for plant growth are the leaves, not the roots.

The leaves lose their chlorophyll and retain lutein and tear carotene, giving them a yellow appearance. If the external environment is not improved, there may be a phenomenon of stripping.

Therefore, in order to cultivate a good pine bonsai, you need to be more careful and find the root cause from the phenomenon of pine trees to deal with it, so as to rejuvenate the pine bonsai!

Yes, there is still salvation for the black pine leaves to turn yellow and dry up. Here are some ways to help:

1.Pruning half day: After the leaves of the black pine are yellow, you can prune the yellowed leaves first, prune off the yellowed leaves, and then put them in a semi-shady environment for 15 days, or place them in a position of astigmatism for half a day, which has a relieving effect on the yellowing of the leaves and can also prevent further yellowing of the leaves.

2.Spraying carbendazim solution: the treatment method for yellowing of black pine leaves is also spraying carbendazim, if the leaves of black pine are only yellow at the top and the middle and bottom of the leaves are all green, then it should be suffering from red blight, at this time it should be diluted with carbendazim and water, and it can also be used with Bika foliar fertilizer, and then spray the leaves in the morning and evening, so that it can be effective ** red blight, and the symptoms will be relieved after waiting for about half a month.

3.Transplanting and soil change: acidic soil will be more conducive to the growth of black pine, so if the soil is alkaline or neutral, it will cause the leaves of black pine to turn yellow, then you need to replace the soil with 30% humus, 25% coarse sand and 45% vegetable garden soil, after transplanting, and then place the rotten pine bark on the surface of the soil.

4.Cool environment: black pine is afraid of the stuffy growth environment, so if it grows in a sultry environment for a long time, there will be a phenomenon of yellowing of stuffy roots and leaves, at this time it is necessary to ensure a cool environment, do not place it on the balcony, it is best to place it outdoors to breed and relax, to ensure the circulation of air, and the leaves of black pine will be eased.

5.Prune the roots: remove the black pine to see if there is rot in the roots, if there is a need to prune with scissors, and then replant, you can add a few drops of carbendazim solution to the water every time you water, which can repair the rotten wounds of the roots, so that the roots can absorb nutrients normally, and the yellowing of the leaves will also be alleviated.

The above is the rescue method for the yellow and dry leaves of black pine, I hope it will help you.

There is salvation, black pine.

If the leaves are yellow, you need to prune off the yellow leaves first, and carry out 10 days of half-day sunlight or 15 days of no light to alleviate them, if you find that the tips of the leaves are yellow and the middle of the leaves is green, you need to spray diluted carbendazim.

solution, keep it cool, and place it outdoors in a well-ventilated environment whenever possible.

In order to control the shape of the black pine bonsai, it is best not to fertilize it at will, which is easy to cause excessive growth. Generally, when pruning its new shoots, apply Bika water-soluble fertilizer, it is best to fertilize first and then prune the new shoots, so that it will not affect its germination again, and the fertilizer is nitrogen, phosphorus and potassium.

Fertilizer-based.

<>1. Pruning half daylight.

After the leaves of black pine are yellow, you can prune the yellowed leaves first, and then put them in a semi-shaded environment for 15 days, or place them in a scattered position for half a day, which has a relieving effect on the yellowing of the leaves and can also prevent further yellowing of the leaves.

2. Spray carbendazim solution.

If the leaves of black pine are only yellow at the top and the middle and bottom of the leaves are all green, then it should be suffering from red blight, at this time it should be diluted with carbendazim and water, and it can also be used with Bika foliar fertilizer, and then spray the leaves in the morning and evening, so that it can be effective ** red blight, and the symptoms will be relieved after waiting for about half a month.

3. Transplanting and soil change.

Acidic soil will be more conducive to the growth of black pine, so if the soil is alkaline or neutral, it will cause the leaves of black pine to turn yellow, then you need to replace the soil with 30% humus, 25% coarse sand and 45% vegetable garden soil, after transplanting, and then place the rotten pine bark on the surface of the soil.

4. Cool environment.

Black pine is afraid of the sultry growth environment, so if it grows in the sultry environment for a long time, there will be a phenomenon of yellowing of the stuffy roots and leaves, at this time it is necessary to ensure a cool environment, do not place it on the balcony, it is best to place it outdoors to breed and relax, to ensure the circulation of air, and the leaves of black pine will be eased.

5. Prune the roots.

Remove the black pine to see if there is rot in the roots, if there is a need to prune with scissors, and then replant, you can add a few drops of carbendazim solution to the water every time you water, which can repair the wounds of root rot, so that the roots can absorb nutrients normally, and the yellowing of the leaves will also be alleviated.

Summary. The yellowing of the leaves of black pine can be due to a variety of reasons. Here are some suggested analyses and possible causes:

1.Lack of light: Black pine needs plenty of sunlight for photosynthesis.

If there is not enough light, it can cause the leaves to turn yellow. Please check the location of the black pine and move it to a sunny place. 2.

Dehydration: Black pine needs to be kept in adequate moisture. If there is not enough water**, the leaves will turn yellow due to lack of water.

Check the soil moisture of the black pine to make sure there is enough moisture**. 3.Soil Issues:

Black pine is suitable for growing in well-drained, acidic soils. If the soil is not pH properly or poorly drained, it can lead to yellowing of the leaves. Please check the pH of the soil and if needed, add acidic fertilizer or replace the soil suitable for the growth of black pine.

4.Insufficient or excessive fertilizer: Black pine needs proper fertilizer to maintain growth.

If the fertilizer is insufficient, the leaves may turn yellow. Follow the correct fertilization method to provide the right amount of fertilizer for the black pine. On the other hand, excessive fertilization may cause the leaves to turn yellow or burn the roots.

Pests and diseases can also cause the leaves of the black pine to turn yellow. Please check the leaves of the black pine for signs of pests and diseases, such as spots, wormholes, etc. If found, please take corresponding pest control measures in time.

To solve the problem of yellowing of black pine leaves, you first need to find out the specific cause, and then take corresponding solutions according to the cause. You can refer to the above analysis and recommendations and consult a professional horticulturist.

I'm still a little confused, can you be more detailed?

The yellowing of the leaves of black pine can be due to a variety of reasons. Here are some suggested analyses and possible causes:1

Lack of light: Black pine needs plenty of sunlight for photosynthesis. If there is not enough light, it can cause the leaves to turn yellow.

Please check the location of the black pine and move it to a sunny place. 2.Water shortage:

Black pine needs to be kept in sufficient moisture. If the moisture is insufficient, the leaves will turn yellow due to lack of water. Check the soil moisture of the black pine to make sure there is enough moisture**.

3.Soil problems: Black pine is suitable for growing in well-drained, acidic soils.

If the soil is not pH properly or poorly drained, it can lead to yellowing of the leaves. Check the pH of the soil and if needed, add acidic fertilizer or replace the soil suitable for the growth of black pine. 4.

Insufficient or excessive fertilizer: Black pine needs proper fertilizer to maintain growth. If the fertilizer is insufficient, the leaves may turn yellow.

Follow the correct fertilization method to provide the right amount of fertilizer for the black pine. On the other hand, excessive fertilization may cause the leaves to turn yellow or burn the roots. Follow the recommended amount and method of fertilization.

5.Infection with pests and diseases: Pests and diseases can also cause the leaves of the black pine to turn yellow.

Please check the leaves of the black pine for signs of pests and diseases, such as spots, wormholes, etc. If found, please take corresponding pest control measures in time. To solve the problem of yellowing of black pine leaves, you first need to find out the specific cause, and then take corresponding solutions according to the cause.

You can refer to the above analysis and recommendations and consult a professional horticulturist.