How to treat black stems on roses
As the temperature rises, flowers and plants have also entered a period of rapid growth. Friends who like to grow flowers will also take cuttings and propagate various flowers during this period, such as roses, gardenias, camellias, money trees, etc. However, after some friends cut flowers, they always have black stems that cannot take root, causing the cutting to fail, which is really annoying!
In fact, in the process of cutting flowers and trees, in order to improve the survival rate of the cuttings, the branches and substrate must be sterilized before cutting, such as soaking the cuttings with carbendazim solution and disinfecting the cutting substrate; for To improve the survival rate, rooting agents and other drugs should also be used to promote rooting. Otherwise, the cuttings will breed a lot of bacteria after cutting, which will gradually lead to black stems in the cuttings.
In the process of cutting flowers and trees, in addition to sterilizing the cuttings, it is also very important to sterilize the cutting substrate. In addition to drug treatment, you can also use methods such as sun exposure sterilization, microwave high-temperature sterilization, steaming sterilization, etc. To sterilize the substrate, it can effectively kill the germs in the cuttings and the substrate, thereby avoiding the phenomenon of black rods after transplantation and improving the survival rate.
Rose dieback (Die Back), also known as fusarium wilt, is also called rose black stem disease. It refers to the blackening of the tops of rose branches and stems, and then continues to move downwards.
There are two main reasons why this happens to newly planted roses.
•The first is the most common – not enough water.
Newly planted roses need a lot of water because their roots have not yet taken root.
•The second reason is the acidic soil or fertilizer used during planting.
Rose needs soil with a pH value of about 6.5, which is a slightly acidic soil. If it’s too low, any new root development will be burned away.
Note that dieback can also be a completely normal condition. Roses require a lot of energy to continually reproduce stems and flowers, so they are very economical to grow. If a rose no longer needs a stem or part of a stem, it will stop the flow of sap, killing that area. This will occur at the tips of the stems where there is no noticeable growth. Such deaths are often normal.
When pruning roses, please cut 5mm above the bud point and do not leave too much bare stem. This is also the main method to avoid the occurrence of black stem disease.
Treat
If black rod occurs, cut off the affected area. When making the cutting, make sure the stem is white throughout and shows no signs of disease. If the deadhead is not removed, it will continue to move down the branches and eventually kill the plant.
Expanded information:
Anyone who enjoys growing roses will want to try cuttings. In fact, the flower arrangement of roses is very simple, but when many people cut it, the stems are easy to remove the roots. In fact, you didn’t master the time and didn’t use the correct method.
The best time to take rose cuttings is to cut them after the flowers bloom, that is, when the temperature is guaranteed to be above 15 degrees. We select the branch so that after it has finished flowering we select the branch and then select the rest of the flowering branches. Underneath the buds we find apparently intact buds where the leaves and stems join. cm, 1 to 2 pairs of leaves. After cutting off the branches, cut a bevel at the bottom. Leaves at the base of the bud point can be left on without cutting all the leaves. Only one or two small leaves should remain on top. .
After pruning, soak the pruned branches and rooting liquid in water for 2 to 3 hours. The concentration of rooting liquid should not be too high. After soaking, we can cut it. The cutting soil should be as breathable as possible. Xiaoqi generally uses nutrient soil to cut directly, because the nutrient soil has good air permeability and contains certain nutrients. Insert the branches, then pour them into the water, add a small amount of rooting solution to the water, and add carbendazim. The rooting liquid allows it to grow quickly. Carbendazim prevents fungi in the soil and causes black stem infections in wounds.
Place it in a well-ventilated area with diffuse light and ensure the potting soil is moist. When the soil surface is dry, water should be watered in time. Don’t use too big a pot. If the leaves are choked, you can mist them daily with a fine watering can. Let the leaves absorb water. If the temperature can be guaranteed to be above 15 degrees, we will find that its bud points will grow significantly in up to a week. After about two weeks, we can move it to a new soil pot because its root system The growth is very good, so here is how to cut a rose, which you have learned, can be cut with 100% survival rate.
Original article author：Fragrant Road Full，If reprinted, please indicate the source.：https://www.theroadfull.com/article/2815.html
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