How to rescue the blackened branches of roses and drooping leaves

The stem of the potted rose branch is black, which may be caused by black spot disease, mainly prevention, if the disease occurs, it needs to be sprayed. It can also be caused by too much or too much fertilizer, so stop fertilizing, prune the roots, and replant them in pots. It can also be caused by excessive water application, which promotes the evaporation and discharge of water, and if the roots are rotten, they should also be treated.

1. Infection with melanoma.

Reason: Around April to July, you may be infected with black spots, at first only small purple-brown spots appear on the leaves, and then gradually expand and become more serious, and in the later stage, the branches also have black spots, resulting in the distribution of black branches and branches.

Solution: This disease is mainly prevention-oriented, to sweep the fallen leaves in a timely manner, you can regularly spray Trim amino acid foliar fertilizer to promote plant growth, reduce the chance of infection, if the disease occurs, it needs to be sprayed.

2. Excessive fertilization.

Reason: Potted roses have more nutrient needs, but fertilization needs to be paid attention to, once there is too much fertilization, or the concentration of fertilizer is too high, it will cause the root system to be difficult to adapt, resulting in the root being burned out, making the root rot, and the branch part will also be blackened.

Solution: After finding that there is too much fertilization, it is necessary to stop it in time, prune the roots, and replant them in pots to promote the growth of new roots.

3. Too much water.

Reason: Roses are drought-tolerant and waterlogging-tolerant plants, and if too much water is applied, water will accumulate in the potting soil, causing roots to rot and branches to cause problems.

Solution: Promote the evaporation and discharge of water, and if the roots are rotten, they should also be treated.

caused by overwatering, it can be remedied by placing the rose in a dry and ventilated place to accelerate the evaporation of water; If you are infected with black spot disease, you need to cut off the infected branches, apply 1:1:200 Bordeaux solution to the wound, and spray the whole plant with carbendazim once a week for one month; If it is caused by insufficient light, it is necessary to place the rose in a sunny place for maintenance.

The black and dry branches of the rose may be due to excessive watering, the rose is more drought tolerant, not waterlogging, too much watering will lead to oversaturation of water in the soil, the roots are difficult to breathe, affecting the development of the branches, and the appearance of black and dry. At this time, the rose should be placed in a dry and ventilated place to speed up the evaporation of moisture.

The dry and blackened branches of the rose may also be due to black spot infection, which can be caused by black spots on the infected branches and leaves. This condition requires immediate cutting of the infected part, applying 1:1:200 of Bordeaux solution to the wound and spraying the whole plant with carbendazim once a week for one month.

If the amount of fertilizer is too high or the concentration of fertilizer is too high, the roots will be burned, resulting in the black and dry branches of the rose. It is necessary to cut off the rotten roots of the roses, and then place them in the new soil, and then apply 1000 times of the general fertilizer of Hua Duoduo once a week, and control it at 20ml 30ml each time.

The blackened and withered branches of roses may also be due to a lack of light, and roses obtain energy through photosynthesis. When the light is insufficient, the rose does not have enough energy to maintain the survival of the epidermal cells of the branches, and the phenomenon of blackening and dryness appears. At this time, it is necessary to place the roses in a sunny place for maintenance.

The black and dry branches of roses are probably caused by infection, the common disease is black spot, once infected on the branch will leave black spots, the spots will gradually expand, and finally black and dry.

If this situation is caused, all the branches infected with the disease must be cut off, and they should be burned intensively, and the sterilization and disinfection solution must be sprayed on the diseased plants to avoid leaving the germs. This disease is mainly prevention, to clean up the fallen leaves in time, and strengthen management, improve the disease resistance of plants, reduce the disease.

The blackened and withered branches of the rose may also be caused by improper fertilization. It consumes a lot of nutrients during the growing season, and it needs to be topdressed, but only a thin fertilizer can be applied. If the concentration of fertilizer applied is too high, it is easy to produce fertilizer damage, which will burn the roots and gradually blacken the branches.

If this is the case, the plant should be dug out of the soil as soon as possible, the roots and branches should be pruned, sterilized and disinfected, and then replanted. Note that the top dressing must be applied diligently with thin fertilizer.

Roses are somewhat drought tolerant and are afraid of waterlogging. If it is watered frequently during planting, it will hinder the respiration of the root system, which will affect the development of the branches. If this situation is caused, it is necessary to drain the stagnant water as soon as possible, and to strengthen ventilation to evaporate the water, and if the situation is serious, it is necessary to remove the plants, prune the rotten roots, and replant.

In the later stage, the number of times and the amount of water should be controlled, and the soil should be slightly wet, and it is strictly forbidden to accumulate water. If there is continuous rain, not only should you stop watering, but you must also drain the water in the soil in time.

In order to provide disease resistance of roses, it is necessary to apply nitrogen, phosphorus and potassium compound fertilizer every 15-20 days during the growth period of the plant, and cut off the upper branches before the flower bud germination in spring each year, leaving the 3-4 buds at the base.

Hello, dear, I am glad to answer for you: three methods are provided for you.

If the branches are black and dry due to black spot infection, the diseased part should be reduced as soon as possible and sprayed.

If improper fertilization causes fertilizer damage, resulting in blackening, the blackened part should be reduced, and the plant should be dug up, pruned with roots, and then replanted with soil.

If it is caused by excessive watering and rotten roots, it is necessary to drain the water as soon as possible, and if it is serious, it is necessary to dig up the plants and re-cultivate, and water them correctly in the later stage.

It is best to cut off black branches or dry branches to avoid spreading to other branches, if you do not prune them in time, it may slowly spread to other good branches, causing the whole plant to go bad.

Summary. 1 Dark spots on the leaves of roses may be overwatered. It is a shallow-rooted plant and is also drought tolerant.

If it is watered too much or too often, it is easy to accumulate water, easy to rot roots, it can not deliver nutrients to the leaves, and the leaves are easy to grow black spots after a long time, and even fall off. In this case, it is recommended to remove the pot and repot, and in the process of changing the pot, it is necessary to trim the roots, disinfect, dry the wound and replant. In the later stage, pay attention to reducing the amount of water, do not dry and do not water at will.

What's going on with the blackening of rose leaves.

1 Dark spots on the leaves of roses may be overwatered. It is a shallow-rooted plant and is also drought tolerant. If it is watered too much or too often, it is easy to accumulate water, easy to rot roots, it can not deliver nutrients to the leaves, and the leaves are easy to grow black spots after a long time, and even fall off.

In this case, it is recommended to remove the pot and repot, and in the process of changing the pot, it is necessary to trim the roots, disinfect, dry the wound and replant. In the later stage, pay attention to reducing the amount of water, do not dry and do not water at will.

2 Roses like to grow in a well-lit environment. If it is placed in a cool place or a low-light place for a long time during the management period, it will affect the photosynthesis of the leaves, resulting in poor growth, and the leaves are prone to dark spots. In this case, move to the light as soon as possible and let it bask in the sun.

The daily light exposure time should be more than 6 hours in order to maintain normal growth. Pay attention to slowly increase the light intensity, and do not directly expose to strong light to avoid injury.

3 Roses with dark spots on their leaves can also be infected with black spots, especially between July and September. Once infected with this disease, it will seriously damage the leaves, easily lead to defoliation, and also affect flowering. Diseased leaves should be removed in time and completely destroyed.

It is also necessary to spray drugs, with chlorothalonil or zeb, spraying once every 7-10 days, and spraying three or four times in a row.