What is the scorching edge of the tender leaves of Chinese rose in spring?

I love greening and planting flowers. The roses maintained in urban greening basically show signs of blooming soon, while the roses maintained indoors are later, so it turns out that the roses that are grounded will always grow faster. Today, some netizens asked, flower friends said: What is the matter with the blackening of the tender leaves of Chinese rose maintained in spring? I feel that Chinese rose is so difficult to maintain.

key point: the main tasks of Chinese rose maintenance in spring are pruning and fertilizing. Of course, we should pay attention to preventing root burning when fertilizing. With the increase of temperature, we should also do a good job in pest control. Personally, I think the Chinese rose of netizens is mainly damaged by thrips, burned by high temperature water and exposed to high temperature at noon, and the weather is hot and rainy.

Let's take a look at the pictures provided by netizens:

In the first circle, the young leaves are curly, the leaves turn green, the veins turn green as well, and the tips of the leaves are black, dry and burning, while the old leaves in the second circle are normal, indicating that the young leaves have low resistance, which has a great impact on the environment. It may be caused by watering and exposure to the sun. In the third circle, it is thought that it is the drug spots left by spraying, but it is actually the phenomenon of turning green caused by thrips.

Look at the second picture:

At the position of circle 1, the leaves are curled and the dry tips are dehydrated, which is the harm of thrips.

In the second circle, the leaves are dry and burning, and the tender leaves are scorched. Note that the leaves have transparent green spots, which is obviously the harm of thrips. In fact, the scorching of the tip is caused by high-temperature watering or high-temperature exposure at noon.

There are obvious white spots on the third lap, and brown spots on the edge of the leaves, which are caused by sunburn in sunny weather after rain.

conclusion: the netizen's rose is mainly caused by thrips, sudden environmental change and high temperature exposure, sunny exposure after rain, or high temperature watering at noon, which is not a big problem, but attention should be paid to the later maintenance. In spring, the tender leaves of Chinese rose are blackened, and the flower grower gives his own suggestions

1. Don't water at high temperature at noon < P > When maintaining Chinese rose, the flower grower suggests that the water temperature and soil temperature are almost the best, and when watering, don't water at high temperature, and the sudden high temperature in spring can't water at noon, which is easy to cause burning of tender leaves.

2, prevention and control of thrips

Flower growers suggest prevention and control of thrips, otherwise the tender leaves will not curl and unfold, and all the water in the leaves will be absorbed by thrips in the later stage, resulting in transparent white spots on the leaves, which will affect the function of the leaves and lead to the tender leaves falling and dry branches. Imidacloprid and acetamiprid can be used for spray control.

3, the temperature should be stable when leaving the room

When maintaining Chinese roses in spring, indoor maintenance will move out of the balcony for maintenance, which is what we call leaving the room. Flower growers suggest that the temperature should be stable when maintaining Chinese roses in spring. It is suggested that leaving the room at about 2 degrees, avoiding leaving the room in late spring and avoiding leaving the room in high temperature and scorching sun will all cause young leaves injury.